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  • 301.
    Stenfelt, Stefan
    Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology. Linköping University, Faculty of Health Sciences.
    Overview and recent advances in bone conduction physiology2007In: Middle Ear Mechanics in Research and Otology: Proceedings of the 4th International Symposium / [ed] A Huber and A Eiber, Singapore: World Scientific Publishing Co. , 2007, p. 1-9Chapter in book (Other academic)
    Abstract [en]

    In the summer of 2006, the 5th International Symposium on Middle Ear Mechanics in Research and Otology was held at the University of Zurich, Switzerland. More than 250 participants from 33 countries in all five continents came together to present their most current research results, exchange their knowledge in practical applications, to discuss open questions and discover new unsolved problems. This book includes representative, peer-reviewed articles of the lectures and papers presented during the symposium, and thereby gives an overview of the ongoing research and current knowledge in the function and mechanics of the normal, diseased and reconstructed middle ear. It covers basic research, engineering and clinical aspects of evaluation, diagnosis and surgery of the middle ear as well as implantable hearing devices in a very broad and interdisciplinary way. Following the tradition of the organizers of the previous conferences to collect the contributions of the symposium, this volume further initialized and promotes many fruitful discussions on middle ear mechanics with different points of view.

  • 302.
    Stenfelt, Stefan
    Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology. Linköping University, Faculty of Health Sciences.
    Overview and recent advances in bone conduction physiology2006In: 4th International Symposium on Middle Ear Mechanics in Research and Otology, Zurich, Switzerland, 2006Conference paper (Refereed)
  • 303.
    Stenfelt, Stefan
    Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology . Linköping University, Faculty of Health Sciences.
    Perception of one’s own voice with hearing aids2010In: International Hearing Aid Research Conference 2010, 2010Conference paper (Refereed)
  • 304.
    Stenfelt, Stefan
    Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology . Linköping University, Faculty of Health Sciences.
    Physiological aspects regarding bilateral fitting of BAHAs2005In: Cochlear Implants International, ISSN 1556-9152, Vol. 6, no S1, p. 83-86Article in journal (Refereed)
  • 305.
    Stenfelt, Stefan
    Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology. Linköping University, Faculty of Health Sciences.
    Physiology of Bone Conduction III2007In: 1st International Symposium – Bone Conduction Hearing and Osseointegration, Halifax, Canada, 2007Conference paper (Refereed)
  • 306.
    Stenfelt, Stefan
    Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology. Linköping University, Faculty of Health Sciences.
    Recent advances on direct bone conduction2009In: 2nd Int Symposium on Bone Conduction Hearing – Craniofacial Osseointegration, Göteborg, Sweden, 2009Conference paper (Refereed)
  • 307.
    Stenfelt, Stefan
    Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology. Linköping University, Faculty of Health Sciences.
    Screening strategies2009In: Deutsches Ärzteforum 2009, Berlin, Germany, 2009Conference paper (Other academic)
  • 308.
    Stenfelt, Stefan
    Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology. Linköping University, Faculty of Health Sciences.
    Skull vibration during bone conduction hearing2013In: 20th International Congress on Sound and Vibration, Bangkok, Thailand, 2013Conference paper (Refereed)
  • 309.
    Stenfelt, Stefan
    Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology. Linköping University, Faculty of Health Sciences.
    Specifics of inner ear hearing loss – a modelling approach2008In: International Congress of Audiology, Hong Kong, 2008Conference paper (Refereed)
  • 310.
    Stenfelt, Stefan
    Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology. Linköping University, Faculty of Health Sciences.
    Specifics of inner ear hearing loss – model and simulations2008In: NTAF-STAF 2008, Hudiksvall, Sweden, 2008Conference paper (Other academic)
  • 311.
    Stenfelt, Stefan
    Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology. Linköping University, Faculty of Health Sciences.
    Specifics of the hearing impairment and its affect on the ascending information stream2007In: From Signal to Dialogue, Linköping, Sweden, 2007Conference paper (Refereed)
  • 312.
    Stenfelt, Stefan
    Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology. Linköping University, Faculty of Health Sciences.
    Stapediusreflexens påverkan på egna rösten2010In: Sveriges tekniska audiologers förening, 2010 Eskilstuna, 2010Conference paper (Other academic)
  • 313.
    Stenfelt, Stefan
    Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology. Linköping University, Faculty of Health Sciences.
    The demands on the cognitive system – what the audiogram does not tell you2013Conference paper (Refereed)
  • 314.
    Stenfelt, Stefan
    Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology. Linköping University, Faculty of Health Sciences.
    The perception of own-voice with hearing aids usage2006In: 28th International Congress of Audiology, Innsbruck, Austria, 2006Conference paper (Refereed)
  • 315.
    Stenfelt, Stefan
    Linköping University, Faculty of Health Sciences. Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology .
    Towards understanding the specifics of cochlear hearing loss: a modelling approach2008In: International Journal of Audiology, ISSN 1499-2027, E-ISSN 1708-8186, Vol. 47, no suppl 2, p. 10-15Article in journal (Refereed)
    Abstract [en]

    It is well known that two patients suffering from a sensorineural hearing loss with similar audiograms can benefit significantly differently from amplified hearing even if the same settings of the hearing aids are used. The origin of this problem is complex but one part can be caused by the diagnosis itself; all inner-ear hearing losses are assumed similar. Such hypothesis is a simplification that probably leads to suboptimal hearing-aid fitting. For a better understanding of the signal degeneration caused by a cochlear lesion a model layout of the signal transmission in the peripheral hearing organ is presented. This model differentiates between processes in the inner ear caused by the outer hair cells, the inner hair cells, and the endocochlear potential driving the system. The model is intended to predict alteration of the signal caused by different types of cochlear lesions. Ultimately, the model may lead to improved hearing aids and fittings. 

  • 316.
    Stenfelt, Stefan
    Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology. Linköping University, Faculty of Health Sciences.
    Transcranial Attenuation of Bone-Conducted Sound When Stimulation Is at the Mastoid and at the Bone Conduction Hearing Aid Position2012In: Otology and Neurotology, ISSN 1531-7129, E-ISSN 1537-4505, Vol. 33, no 2, p. 105-114Article in journal (Refereed)
    Abstract [en]

    Hypothesis: The transcranial attenuation of bone-conducted (BC) sound depends on the stimulation position and the stimulation frequency. less thanbrgreater than less thanbrgreater thanBackground: Subjective transcranial attenuation of BC sound has previously only been measured at a few audiometric frequencies and with the stimulation at the mastoid. The results reported are on average of 5 to 10 dB with large intersubject variability and inconsistent with results obtained using vibration measurements of the cochlea. less thanbrgreater than less thanbrgreater thanMethods: Pure tone hearing thresholds were measured in 28 unilateral deaf subjects at 31 frequencies between 0.25 and 8 kHz. The stimulation was provided at 4 positions: ipsilateral and contralateral mastoid, and ipsilateral and contralateral position for a bone conduction hearing aid. less thanbrgreater than less thanbrgreater thanResults: With stimulation at the mastoid, the median transcranial attenuation is 3 to 5 dB at frequencies up to 0.5 kHz; between 0.5 and 1.8 kHz, it is close to 0 dB. The attenuation increases at higher frequencies; it is close to 10 dB at 3 to 5 kHz and becomes slightly less at the highest frequencies measured (4 dB at 8 kHz). When measured at the bone conduction hearing aid position, the median transcranial attenuation is 2 to 3 dB lower than at the mastoid. The intersubject variability is large at each frequency (around 40 dB), but there are small differences in general trends of the transcranial attenuation between individuals. less thanbrgreater than less thanbrgreater thanConclusion: The median transcranial attenuation depends on stimulation position and frequency. However, the variability is great, both between individuals and within subjects for adjacent frequencies.

  • 317.
    Stenfelt, Stefan
    Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology. Linköping University, Faculty of Health Sciences.
    Utvärdering av nya stimuli för klinisk hjärnstamsaudiometri2009In: TeMA Hörsel, Jönköping, Sweden., 2009Conference paper (Refereed)
  • 318.
    Stenfelt, Stefan
    Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology . Linköping University, Faculty of Health Sciences.
    Värt att veta om ASSR2006In: Audio-Nytt, ISSN 0347-6308, Vol. 33, no 3, p. 14-16Article in journal (Other (popular science, discussion, etc.))
  • 319.
    Stenfelt, Stefan
    Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology. Linköping University, Faculty of Health Sciences.
    Wideband absorbance measures2013Conference paper (Refereed)
  • 320.
    Stenfelt, Stefan
    et al.
    Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology. Linköping University, Faculty of Health Sciences.
    Asp, Filip
    Karolinska Institutet.
    Harder, Henrik
    Linköping University, Faculty of Health Sciences. Linköping University, Department of Clinical and Experimental Medicine, Oto-Rhiono-Laryngology and Head & Neck Surgery. Östergötlands Läns Landsting, Reconstruction Centre, Department of ENT - Head and Neck Surgery UHL.
    Hergils, Leif
    Linköping University, Faculty of Health Sciences. Linköping University, Department of Clinical and Experimental Medicine, Oto-Rhiono-Laryngology and Head & Neck Surgery. Östergötlands Läns Landsting, Reconstruction Centre, Department of ENT - Head and Neck Surgery UHL.
    Karltorp, Eva
    Karolinska Institutet.
    Mäki-Torkko, Elina
    Linköping University, Faculty of Health Sciences. Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology.
    Klinisk utvärdering av 80 barn med bilaterala cochleaimplantat2009In: TeMA Hörsel, Jönköping, Sweden, 2009Conference paper (Refereed)
  • 321.
    Stenfelt, Stefan
    et al.
    Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology . Linköping University, Faculty of Health Sciences.
    Goode, Richard
    Stanford University.
    Bone conducted sound: Physiological and clinical aspects2005In: Otology and Neurotology, ISSN 1531-7129, E-ISSN 1537-4505, Vol. 26, no 6, p. 1245-1261Article in journal (Refereed)
  • 322.
    Stenfelt, Stefan
    et al.
    Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology . Linköping University, Faculty of Health Sciences.
    Hato, Naohito
    Stanford University.
    Goode, Richard
    Stanford University.
    Factors contributing to bone conduction: The middle ear2002In: Journal of the Acoustical Society of America, ISSN 0001-4966, E-ISSN 1520-8524, Vol. 111, no 2, p. 947-959Article in journal (Refereed)
  • 323.
    Stenfelt, Stefan
    et al.
    Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology. Linköping University, Faculty of Health Sciences.
    Håkansson, Bo
    Chalmers.
    A bone conduction implant – measurements in a human cadaver2008In: International Congress of Audiology, Hong Kong, 2008Conference paper (Refereed)
  • 324.
    Stenfelt, Stefan
    et al.
    Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology . Linköping University, Faculty of Health Sciences.
    Håkansson, Bo
    Chalmers.
    Air versus bone conduction: An equal loudness investigation2002In: Hearing Research, ISSN 0378-5955, E-ISSN 1878-5891, Vol. 167, no 1-2, p. 1-12Article in journal (Refereed)
  • 325.
    Stenfelt, Stefan
    et al.
    Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology. Linköping University, Faculty of Health Sciences.
    Håkansson, Bo
    Chalmers.
    An implantable hearing aid using bone conduction transmission2006In: 28th International Congress of Audiology, Innsbruck, Austria, 2006Conference paper (Refereed)
  • 326.
    Stenfelt, Stefan
    et al.
    Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology . Linköping University, Faculty of Health Sciences.
    Jacobs, Reinhilde
    Catholic University Leuven.
    Olmarker, K
    Göteborg University.
    Rydevik, Björn
    Göteborg Universitet.
    Brånemark, Per-Ingvar
    Applied Biotechnology.
    A Technique for Determination of Vibrotactile Force Threshold Levels in Patients with Orthopaedic Osseointegrated Implants1998In: Osseoperception / [ed] R. Jacobs, Leuven: Catholic University of Leuven , 1998, p. 105-123Chapter in book (Other academic)
  • 327.
    Stenfelt, Stefan
    et al.
    Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology. Linköping University, Faculty of Health Sciences.
    Janssen, Thomas
    Technische Universität München.
    Schirkonyer, Volker
    Technische Universität München.
    Grandori, Ferdinando
    Instituto di Ingengeria Biomedica Milano.
    e-Health technologies for adult hearing screening2011In: Audiology Research, ISSN 2039-4349, Vol. 1, p. 55-57Article in journal (Refereed)
    Abstract [en]

    The development of hearing diagnosis methods and hearing screeningmethods are not isolated phenomena: they are intimately relatedto changes in the cultural background and to advances in fields of medicineand engineering. In the recent years, there has been a rapid evolutionin the development of fast, easy and reliable techniques for lowcosthearing screening initiatives. Since adults and elderly people typicallyexperience a reduced hearing ability in challenging listening situations[e.g., in background noise, in reverberation, or with competingspeech (Pichora‑Fuller & Souza, 2003)], these newly developedscreening tests mainly rely on the recognition of speech stimuli innoise, so that the real experienced listening difficulties can be effectivelytargeted (Killion & Niquette, 2000). New tests based on therecognition of speech in noise are being developed on portable, battery-operated devices (see, for example, Paglialonga et al., 2011), ordistributed diffusely using information and communication technologies.The evolutions of e-Health and telemedicine have shifted focusfrom patients coming to the hearing clinic for hearing health evaluationtowards the possibility of evaluating the hearing status remotelyat home. So far, two ways of distributing the hearing test have primarilybeen used: ordinary telephone networks (excluding mobile networks)and the internet. When using the telephone network for hearingscreening, the predominantly test is a speech-in-noise test oftenreferred to as the digit triplet test where the subjects hearing status isevaluated as the speech-to-noise threshold for spoken digits. This testis today available in some ten countries in Europe, North America andAustralia. The use of internet as testing platform allows several differenttypes of hearing assessment tests such as questionnaires, differenttypes of speech in noise tests, temporal gap detection, sound localization(minimum audible angle), and spectral (un)masking tests.Also, the use of the internet allows audiovisual presentations as wellas visual interaction and cues in the tests for a more ecologicalapproach. Even if several new and novel approaches for hearingassessment using the internet are surfacing, the validated tests arebased on questionnaires or speech-in-noise. Although the internetallows for a broader flora of pure auditory and audiovisual tests forhearing health assessment, calibration problems such as timinguncertainty, output levels and modes of presentation (speakers or earphones)limits the usability at present.

  • 328.
    Stenfelt, Stefan
    et al.
    Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology . Linköping University, Faculty of Health Sciences.
    Janssen, Thomas
    Technische Universitaet Muenchen.
    Schirkonyer, Volker
    Technische Universitaet Muenchen.
    Grandori, Ferdinando
    Istituto di Ingegneria Biomedica, Italy.
    New technologies for adult hearing screening2010Conference paper (Refereed)
  • 329.
    Stenfelt, Stefan
    et al.
    Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology. Linköping University, Faculty of Health Sciences.
    Puria, Sunil
    Stanford University.
    Consider bone-conducted human hearing2010In: The Use of Vibrations in Communication: properties, mechanisms and function across Taxa / [ed] C. O'Connell-Rodwell, Research Signpost , 2010, p. 142-162Chapter in book (Other academic)
    Abstract [en]

    This volume is a collection of chapters representing the depth and breadth of research that underlies the understanding of the complexity and diversity of vibrational communication in the animal kingdom. The chapters, organized by taxa, are all contributed by specialists in their respective fields. Peggy Hill, whose recent book Vibrational Communication in Animals helped set the stage for this volume, has supplied a useful and unifying introduction. The initial three chapters on invertebrates review the remarkable array of mechanisms employed by crustaceans, spiders and insects to generate and detect vibrations. These chapters address the subtleties of the social contexts in which vibration is used in communication, prey detection and avoidance. Also explored is the influence of the ecology of these organisms on vibration transmission and detection as well as the significance of habitat selection in assuring optimal vibration transmission. The next five chapters include a review of what is known about vibration generation, propagation and detection in amphibians and snakes as well as in small and large mammals, including humans. They present in detail the anatomy of the various ear (and jaw) structures that process vibrations, tracing the development of the ear from the simpler frog and snake ear to the more derived mammalian ear that incorporates three bones from the jaw. The treatment of the opercularis of the frog, progressing to the jawbones of snakes, then to the hypertrophied middle ear bones found in small rodents and elephants illustrates the depth of the research that has contributed to our understanding in this field. Topics such as vibration production and detection in the particular context of the sender and receiver are reviewed, as well as other anatomic variants relevant to the generation and detection of vibrations, wave architecture and transmission properties of the substrate. The phenomenon of bone conduction adds a separate pathway for detection through the skeleton in mammals, with pressure waves generated by substrate-borne vibrations oscillating the middle-ear bones in the same way as airborne vibrations, which are then processed in the auditory cortex, although having arrived via this alternative pathway. The penultimate chapter provides a summary of field recording methods that should prove useful for investigators new to this field. It should also be helpful to researchers wishing to compare vibration recording techniques applicable to different species or to learn more about equipment and options for recording vibration transmission properties in different media and soil types. The final chapter presents an overview of what is known about the ability of the largest land mammal, the elephant, to detect and interpret vibrations.

  • 330.
    Stenfelt, Stefan
    et al.
    Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology . Linköping University, Faculty of Health Sciences.
    Puria, Sunil
    Stanford University.
    Hato, Naohito
    Stanford University.
    Goode, Richard
    Stanford university.
    Basilar membrane and osseous spiral lamina motion in human cadavers with air and bone conduction stimuli2004In: Hearing Research, ISSN 0378-5955, E-ISSN 1878-5891, Vol. 198, no 1-2, p. 10-24Article in journal (Refereed)
  • 331.
    Stenfelt, Stefan
    et al.
    Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology. Linköping University, Faculty of Health Sciences.
    Reinfeldt, Sabine
    Chalmers.
    A model of own-voice perception with hearing aid usage2006In: 4th joint meeting of the Acoustical Societies of America and Japan, Honolulu, Hawaii, 2006Conference paper (Refereed)
  • 332.
    Stenfelt, Stefan
    et al.
    Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology. Linköping University, Faculty of Health Sciences.
    Rönnberg, Jerker
    Linköping University, The Swedish Institute for Disability Research. Linköping University, Department of Behavioural Sciences and Learning, Disability Research. Linköping University, Faculty of Arts and Sciences.
    Swedish matrix speech-in-noise test (Hagerman test) in normal hearing subject: psychometric function and relation to working memory2011Conference paper (Other academic)
  • 333.
    Stenfelt, Stefan
    et al.
    Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology . Linköping University, Faculty of Health Sciences.
    Rönnberg, Jerker
    Linköping University, The Swedish Institute for Disability Research. Linköping University, Department of Behavioural Sciences and Learning, Disability Research. Linköping University, Faculty of Arts and Sciences.
    The Signal-Cognition interface: interactions between degraded auditory signals and cognitive processes.2009In: Scandinavian journal of psychology, ISSN 1467-9450, Vol. 50, no 5, p. 385-393Article in journal (Refereed)
    Abstract [en]

    A hearing loss leads to problems with speech perception; this is exacerbated when competing noise is present. The speech signal is recognized by the cognitive system of the listener; noise and distortion tax the cognitive system when interpreting it. The auditory system must interact with the cognitive system for optimal signal decoding. This article discusses this interaction between the signal and cognitive system based on two models: an auditory model describing signal transmission and degeneration due to a hearing loss and a cognitive model for Ease of Language Understanding. The signal distortion depends on the specifics of the hearing impairment and thus differently distorted signals can affect the cognitive system in different ways. Consequently, the severity of a hearing loss may not only depend on the lesion itself but also on the cognitive recourses required to interpret the signal.

  • 334.
    Stenfelt, Stefan
    et al.
    Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology . Linköping University, Faculty of Health Sciences.
    Wild, Tim
    Stanford University.
    Hato, Naohito
    Stanford University.
    Goode, Richard
    Stanford University.
    Factors contributing to bone conduction: The outer ear2003In: Journal of the Acoustical Society of America, ISSN 0001-4966, E-ISSN 1520-8524, Vol. 113, no 2, p. 902-913Article in journal (Refereed)
  • 335.
    Stenfelt, Stefan
    et al.
    Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology. Linköping University, Faculty of Health Sciences.
    Zeitooni, Mehrnaz
    Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology. Linköping University, Faculty of Health Sciences.
    Binaural Hearing Ability in Normal Hearing Subjects When Stimulation is by Bone Conduction2012Conference paper (Refereed)
  • 336.
    Stenfelt, Stefan
    et al.
    Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology. Linköping University, Faculty of Health Sciences.
    Zeitooni, Mehrnaz
    Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology. Linköping University, Faculty of Health Sciences.
    Binaural hearing ability with mastoid applied bilateral bone conduction stimulation in normal hearing subjects2013In: Journal of the Acoustical Society of America, ISSN 0001-4966, E-ISSN 1520-8524, Vol. 134, no 1, p. 481-493Article in journal (Refereed)
    Abstract [en]

    The ability to use binaural cues when stimulation was by bilaterally applied bone conduction (BC) transducers was investigated in 20 normal hearing participants. The results with BC stimulation were compared with normal air conduction (AC) stimulation through earphones. The binaural hearing ability was tested by spatial release from masking, binaural intelligibility level difference (BILD), binaural masking level difference (BMLD) using chirp stimulation, and test of the precedence effect. In all tests, the participants revealed a benefit of bilateral BC stimulation indicating use of binaural cues. In the speech based tests, the binaural benefit for BC stimulation was approximately half that with AC stimulation. For the BC BMLD test with chirp stimulation, there were indications of superposition of the ipsilateral and contralateral pathways at the cochlear level affecting the results. The precedence effect test indicated significantly worse results for BC stimulation than for AC stimulation with low-frequency stimulation while they were close for high-frequency stimulation; broad-band stimulation gave results that were slightly worse than the high-frequency results.

  • 337.
    Stenfelt, Stefan
    et al.
    Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology. Linköping University, Faculty of Health Sciences.
    Zeitooni, Mehrnaz
    Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology. Linköping University, Faculty of Health Sciences.
    Loudness functions with air and bone conduction stimulation in normal-hearing subjects using a categorical loudness scaling procedure2013In: Hearing Research, ISSN 0378-5955, E-ISSN 1878-5891, Vol. 301, p. 85-92Article in journal (Refereed)
    Abstract [en]

    In a previous study (Stenfelt and Håkansson, 2002) a loudness balance test between bone conducted (BC) sound and air conducted (AC) sound was performed at frequencies between 0.25 and 4 kHz and at levels corresponding to 30–80 dB HL. The main outcome of that study was that for maintaining equal loudness, the level increase of sound with BC stimulation was less than that of AC stimulation with a ratio between 0.8 and 0.93 dB/dB. However, because it was shown that AC and BC tone cancellation was independent of the stimulation level, the loudness level difference did not originate in differences in basilar membrane stimulation. Therefore, it was speculated that the result could be due to the loudness estimation procedure. To investigate this further, another loudness estimation method (adaptive categorical loudness scaling) was here employed in 20 normal-hearing subjects.

    The loudness of a low-frequency and a high-frequency noise burst was estimated using the adaptive categorical loudness scaling technique when the stimulation was bilaterally by AC or BC. The sounds where rated on an 11-point scale between inaudible and too loud. The total dynamic range for these sounds was over 80 dB when presented by AC (between inaudible and too loud) and the loudness functions were similar for the low and the high-frequency stimulation. When the stimulation was by BC the loudness functions were steeper and the ratios between the slopes of the AC and BC loudness functions were 0.88 for the low-frequency sound and 0.92 for the high-frequency sound. These results were almost equal to the previous published results using the equal loudness estimation procedure, and it was unlikely that the outcome stems from the loudness estimation procedure itself. One possible mechanism for the result was loudness integration of multi-sensory input. However, no conclusive evidence for such a mechanism could be given by the present study.

  • 338.
    Stenfelt, Stefan
    et al.
    Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology. Linköping University, Faculty of Health Sciences.
    Zeitooni, Mehrnaz
    Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology. Linköping University, Faculty of Health Sciences.
    Loudness Growth with Bone Conduction Stimulation in Normal Hearing Subjects Using a Categorical Scaling Procedure2012Conference paper (Refereed)
  • 339.
    Stenfelt, Stefan
    et al.
    Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology. Linköping University, Faculty of Health Sciences.
    Østergaard-Olsen, Steen
    Dept Otorhinolaryngology, Head & Neck Surgery, University Hospital, Rigshospitalet, Copenhagen, Denmark.
    Mäki-Torkko, Elina
    Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology. Linköping University, Faculty of Health Sciences.
    Nielsen, Lars-Holme
    Dept Otorhinolaryngology, Head & Neck Surgery, University Hospital, Rigshospitalet, Copenhagen, Denmark.
    Glad, Henrik
    Dept Otorhinolaryngology, Head & Neck Surgery, University Hospital, Rigshospitalet, Copenhagen, Denmark.
    Zeitooni, Mehrnaz
    Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology. Linköping University, Faculty of Health Sciences.
    Comparison Of Two Digital Bone-Conduction Hearing Aids In Experienced Users: A Two-Center Study2011In: 3rd International Symposium on Bone Conduction Hearing – Craniofacial Osseointegration, Sarasota, Florida, 2011Conference paper (Refereed)
  • 340.
    Strömberg, Anna-Karin
    et al.
    Linköping University, Department of Clinical and Experimental Medicine, Division of Neuroscience.
    Stenfelt, Stefan
    Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology. Linköping University, Faculty of Health Sciences.
    Olofsson, Åke
    Karolinska Institutet.
    Westin, M
    Karolinska Institutet.
    Duan, Maoli
    Karolinska Institutet.
    Evaluation of temporary cochlear depression in patients after low-frequency cVEMP exposure by means of Békésy audiometry and DPOAEs2012Conference paper (Refereed)
  • 341.
    Sundewall Thorén, Elisabet
    et al.
    Eriksholm Research Centre, Oticon A/S, Snekkersten, Denmark.
    Lunner, Thomas
    Eriksholm Research Centre, Oticon A/S, Snekkersten, Denmark.
    Andersson, Gerhard
    Linköping University, Department of Behavioural Sciences and Learning, Psychology. Linköping University, Faculty of Arts and Sciences.
    Öberg, Marie
    Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology. Linköping University, Faculty of Health Sciences. Östergötlands Läns Landsting, Sinnescentrum, Department of ENT - Head and Neck Surgery UHL.
    Professional online rehabilitation of hearing-impaired adults2012Conference paper (Other academic)
  • 342.
    Sundewall Thorén, Elisabet
    et al.
    Linköping University, Department of Clinical and Experimental Medicine. Linköping University, Faculty of Health Sciences.
    Svensson, Monica
    Lund University.
    Tornqvist, Anna
    Lund University.
    Andersson, Gerhard
    Linköping University, Department of Behavioural Sciences and Learning, Clinical and Social Psychology. Linköping University, Faculty of Arts and Sciences.
    Carlbring, Per
    Umeå University.
    Lunner, Thomas
    Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology. Linköping University, Faculty of Health Sciences.
    Online self-help via a controlled discussion forum2009In: Binaural Processing and Spatial Hearing, Ballerup: The Danavox Jubilee Foundation , 2009Conference paper (Other academic)
    Abstract [en]

    Recent studies on hearing rehabilitation with group discussions show similar long-term benefits as conventional professional counselling (Abrams et al., 2002; Hickson et al., 2007). The use of professional support for self-help via Internet may reduce anxiety and depression (Andersson et al., 2005). Inspired by those results, we created an online discussion forum for self-help where 29 experienced hearing-aid users communicated, on their own for five weeks. Each week they started the discussions from a given topic, without any professional assistance. We measured their reported subjective hearing problems online using standardized questionnaires (HHIE, IOI-HA and SADL) pre and post the online intervention. The findings show that the participants reduced their reported subjective hearing problems significantly by taking part in the discussions. Six months after the online intervention was finished the significant reduction was persistent.

    By using manifest qualitative content analysis of the participants’ online communication we will present results including typical categories and themes in the discussions, as well as peer-to-peer helping behavior.

    The findings indicates that interacting with peers have a positive significant effect on the long-term outcome of their hearing rehabilitation. Further development of this tool could be a very useful instrument in the rehabilitation of hearing impaired adults.

     

    References: Abrams, H., Chisholm., T. H., McArdle, R. (2002). A cost-utility analysis of adults group audiologic rehabilitation: Are the benefits worth the cost? Journal of Rehabilitation Research and Development, 5, 549-558.

    Andersson, G., Bergström, J., Carlbring, P., Lindefors, N. (2005). The use of internet in the treatment of anxiety disorders. Current opinion in Psychiatry, 18, 73-77.

    Hickson, L., Worrall, L., Scarinci, N. (2007). A randomized controlled trial evaluating the Active Communication Education program for older people with hearing impairment. Ear and Hearing, 28, 212-230.

  • 343.
    Sundewall Thorén, Elisabet
    et al.
    Linköping University, Faculty of Health Sciences. Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology.
    Svensson, Monica
    Lund University.
    Tornqvist, Anna
    Lund University.
    Andersson, Gerhard
    Linköping University, Faculty of Arts and Sciences. Linköping University, Department of Behavioural Sciences and Learning, Psychology.
    Carlbring, Per
    Umeå University.
    Lunner, Thomas
    Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology. Linköping University, Faculty of Health Sciences.
    Rehabilitative Online Education versus Internet Discussion Group for Hearing Aid Users: A Randomized Controlled Trial2011In: JOURNAL OF THE AMERICAN ACADEMY OF AUDIOLOGY, ISSN 1050-0545, Vol. 22, no 5, p. 274-285Article in journal (Refereed)
    Abstract [en]

    Background: By using the Internet in the audiological rehabilitation process, it might be possible in a cost-effective way to include additional rehabilitation components by informing and guiding hearing aid users about such topics as communication strategies, hearing tactics, and how to handle hearing aids. Purpose: To evaluate the effectiveness of an online education program for adult experienced hearing aid users including professional guidance by an audiologist and compare it with the effects of participation in an online discussion forum without any professional contact. Research Design: A randomized controlled study with two groups of participants. Repeated measures at prestudy, immediate follow-up, and a 6 mo follow-up. Study Sample: Fifty-nine experienced hearing aid users participated in the study, ranging in age from 24 to 84 yr (mean 63.5 yr). Intervention: The intervention group (N=29) underwent a five-week rehabilitative online education in which activities for each week included information, tasks, and assignments, and contact with a professional audiologist was included. The participants in the control group (N=30) were referred to an online discussion forum without any audiologist contact.. Data Collection and Analysis: A set of questionnaires administered online were used as outcome measures: (1) Hearing Handicap Inventory for the Elderly, (2) International Outcome Inventory for Hearing Aids, (3) Satisfaction with Amplification in Daily Life, and (4) Hospital Anxiety and Depression Scale. Results: Significant improvements measured by the Hearing Handicap Inventory for the Elderly were found in both groups of participants, and the effects were maintained at the 6 mo follow-up. The results on the Hospital Anxiety and Depression Scale showed that the participants in the intervention group showed reduced symptoms of depression immediately/6 mo after the intervention. At the 6 mo follow-up participants in the control group reported fewer symptoms of anxiety than they did before the intervention started. Conclusions: This study provides preliminary evidence that the Internet can be used to deliver education to experienced hearing aid users who report residual hearing problems such that their problems are reduced by the intervention. The study also suggests that online discussion forums could be used in rehabilitation. A combination of online professional supervised education and online informal discussions could be a promising rehabilitation tool.

  • 344.
    Söderberg, Rufus
    et al.
    Örebro universitet, Hälsoakademin.
    Lyxell, Björn
    Linköping University, The Swedish Institute for Disability Research. Linköping University, Department of Behavioural Sciences and Learning, Disability Research. Linköping University, Faculty of Arts and Sciences.
    Larsby, Birgitta
    Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology. Linköping University, Faculty of Health Sciences.
    Dynamic Compression, Spatial Hearing, and Cognitive Performance2008Conference paper (Other academic)
  • 345.
    Söderberg, Rufus
    et al.
    Örebro universitet, Hälsoakademin.
    Lyxell, Björn
    Linköping University, The Swedish Institute for Disability Research. Linköping University, Department of Behavioural Sciences and Learning, Disability Research. Linköping University, Faculty of Arts and Sciences.
    Larsby, Birgitta
    Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology. Linköping University, Faculty of Health Sciences.
    Dynamic compression, spatial Hearing, and cognitive performance2010In: Hearing and deafness from memory to society: ongoing thesis projects / [ed] Magnus Emilsson, 2010Conference paper (Other academic)
    Abstract [en]

    INTRODUCTION. Spatial hearing outcome of hearing aid fitting might benefit from further knowledge of sound lateralization. Effects from signal processing and cognitive speed on sound lateralization performance have been examined in this study.

    METHOD. Sound lateralization performance and cognitive performance were measured in adult participants. They assessed direction of noise pulses presented through earphones. Direction was simulated with interaural level differences with and without interaural time differences. Dynamic compression was set to bypass, independent channels, or linked left and right channels. Cognitive performance was assessed by means of letter matching, lexical or phonological tasks. The mean response time and the number of correct responses were recorded for each test condition.

    RESULTS. For sound lateralization accuracy, presence of interaural time differences improved performance. Independent channels dynamic compression reduced lateralization accuracy. For sound lateralization speed, presence of interaural time differences improved performance by 145 ms. The response time for the lateralization tasks correlated more to the letter matching task than the other cognitive tasks.

    ADDITIONAL DATA. A preview of data from a follow-up experiment will be presented.

  • 346.
    Söderberg, Rufus
    et al.
    Örebro universitet, Hälsoakademin.
    Lyxell, Björn
    Linköping University, The Swedish Institute for Disability Research. Linköping University, Department of Behavioural Sciences and Learning, Disability Research. Linköping University, Faculty of Arts and Sciences.
    Larsby, Birgitta
    Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology. Linköping University, Faculty of Health Sciences.
    Sound lateralization and cognitive performance2010In: From speech to understanding: Biological and cognitive mechanisms / [ed] Agneta Wiberg, 2010Conference paper (Other academic)
    Abstract [en]

    Introduction. Spatial hearing outcome of hearing aid fitting might benefit from further knowledge of sound lateralization. Effects from signal processing and cognitive speed on sound lateralization performance have been examined in this study.

    Method. Sound lateralization performance and cognitive performance were measured in adult participants. They assessed direction of noise pulses presented through earphones. Direction was simulated with interaural level differences with and without interaural time differences. Dynamic compression was set to bypass, independent channels, or linked left and right channels. Cognitive performance was assessed by means of letter matching, lexical or phonological tasks. The mean response time and the number of correct responses were recorded for each test condition. For the lateralization task, two-way fixed-effects ANOVA for repeated measurements were performed. Pearson correlation coefficients were calculated between the lateralization tasks and the cognitive tasks.

    Results. For sound lateralization accuracy, presence of interaural time differences improved performance. Independent channels dynamic compression reduced lateralization accuracy. For sound lateralization, presence of interaural time differences improved the response time by 145 ms and the response accuracy by 9.5 %-units. Dynamic compression with separate sides level detection worsened the response accuracy by 14 %-units compared to bypassed or common level detector compression. The response time for the lateralization tasks correlated more to the letter matching task (Pearson r = 0.7) than the other cognitive tasks (Pearson r ≤ 0.5).

  • 347.
    Sörqvist, Patrik
    et al.
    Linköping University, The Swedish Institute for Disability Research. Linköping University, Department of Behavioural Sciences and Learning. Linköping University, Faculty of Arts and Sciences. University of Gävle, Sweden.
    Stenfelt, Stefan
    Linköping University, The Swedish Institute for Disability Research. Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology. Linköping University, Faculty of Health Sciences.
    Rönnberg, Jerker
    Linköping University, The Swedish Institute for Disability Research. Linköping University, Department of Behavioural Sciences and Learning, Disability Research. Linköping University, Faculty of Arts and Sciences.
    Working Memory Capacity and Visual-Verbal Cognitive Load Modulate Auditory-Sensory Gating in the Brainstem: Toward a Unified View of Attention2012In: Journal of cognitive neuroscience, ISSN 0898-929X, E-ISSN 1530-8898, Vol. 24, no 11, p. 2147-2154Article in journal (Refereed)
    Abstract [en]

    Two fundamental research questions have driven attention research in the past: One concerns whether selection of relevant information among competing, irrelevant, information takes place at an early or at a late processing stage; the other concerns whether the capacity of attention is limited by a central, domain-general pool of resources or by independent, modality-specific pools. In this article, we contribute to these debates by showing that the auditory-evoked brainstem response (an early stage of auditory processing) to task-irrelevant sound decreases as a function of central working memory load (manipulated with a visual-verbal version of the n-back task). Furthermore, individual differences in central/domain-general working memory capacity modulated the magnitude of the auditory-evoked brainstem response, but only in the high working memory load condition. The results support a unified view of attention whereby the capacity of a late/central mechanism (working memory) modulates early precortical sensory processing.

  • 348.
    Tham, Richard
    et al.
    Linköping University.
    Larsby, Birgitta
    Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology. Linköping University, Faculty of Health Sciences.
    Möller, Claes
    Linköping University.
    Niklasson, Magnus
    Östergötlands Läns Landsting.
    Ödkvist, Lars
    Östergötlands Läns Landsting.
    Vestibulotoxicity of organic solvents1991In: Fourth international conference on combined effect of environmental factors / [ed] Laurence D. Fechter, Johns Hopkins University , 1991, p. 101-105Conference paper (Other academic)
  • 349.
    Tham, Richard
    et al.
    Linköping University.
    Larsby, Birgitta
    Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology. Linköping University, Faculty of Health Sciences.
    Niklasson, Magnus
    Östergötlands Läns Landsting.
    Ödkvist, Lars
    Östergötlands Läns Landsting.
    Lesions of the commisural vestibular fibers in rats: The effect on the vestibulo- and opto-oculomotor system1988Conference paper (Other academic)
  • 350.
    Thodi, Chryssola
    et al.
    European University Cyprus, Nicosia.
    Parazzini, M.
    Istituto di Ingegneria Biomedica, Milano, Italy.
    Kramer, Sophia
    VU University Medical Center, Amsterdam, The Netherlands.
    Davis, Adrian
    Royal Free London NHS Foundation Trust, London, UK.
    Stenfelt, Stefan
    Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology. Linköping University, Faculty of Health Sciences.
    Janssen, Thomas
    Technische Universitaet Muenchen, Germany.
    Smith, Pauline
    Royal Free London NHS Foundation Trust, London, UK.
    Stevens, Dye
    Cardiff University, Wales, UK.
    Pronk, Marieke
    VU University Medical Center, Amsterdam, The Netherlands.
    Anteunis, L. I.
    University Medical Centre, Maastricht, The Netherlands .
    Schirkonyer, Volker
    Technische Universitaet Muenchen, Germany.
    Grandori, Ferdinando
    Istituto di Ingegneria Biomedica, Milano, Italy.
    Adult Hearing Screening: Follow-Up and Outcomes2013In: American Journal of Audiology, ISSN 1059-0889, E-ISSN 1558-9137, Vol. 22, p. 183-185Article in journal (Refereed)
    Abstract [en]

    PURPOSE:

    To screen hearing and evaluate outcomes in community-dwelling older adults.

    METHOD:

    Three thousand and twenty-five adults responded to an invitation to be screened by questionnaire, otoscopy, and pure-tone audiometry. Pure-tone average (PTA) >35 dB HL in the worse ear, unilateral hearing loss, or otoscopic findings were the criteria for referral for services. A questionnaire related to compliance with referral recommendations was completed by telephone interview for 160 randomly selected participants after 1-2 years from referral.

    RESULTS:

    The referral rate for audiologic/hearing aid evaluation was 46%, and referral for cerumen removal/medical evaluation was 17%. Of the people referred for audiologic/hearing aid evaluation, 18% tried a hearing aid; 2 years later, 11% were using a hearing aid. Screening recommendations affected participants' decision to seek help. Study participants stated that the screening was helpful, it should be offered to everybody, and they would participate in future screenings.

    CONCLUSION:

    Although adult hearing screening offered timely identification of hearing loss for adults seeking help, follow-up with hearing aid treatment was low.

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