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Utveckling av lyssningstillbehör för samtalsförstärkare
Karlstad University, Faculty of Health, Science and Technology (starting 2013).
2014 (Swedish)Independent thesis Basic level (degree of Bachelor), 15 credits / 22,5 HE creditsStudent thesisAlternative title
Development of Listening Accessories for Personal Amplifiers (English)
Abstract [sv]

En av Bellman & Symfons produkter är den så kallade samtalsförstärkaren. Samtalsförstärkaren är ett hörselhjälpmedel, som genom digital signalbehandling förstärker ljudnivån samtidigt som oönskat bakgrundsljud dämpas.

Via ett 3,5 mm jack på enheten kan vanliga lyssningstillbehör anslutas, såsom hörlurar och öronsnäckor. De lyssningstillbehör som Bellman & Symfon erbjuder idag är av enkel modell, och lämnar mycket att önska vad gäller ljudkvaliteten.

Genom detta projektarbete har jag studerat förbättringsalternativ till dessa lyssningstillbehör, men har fokuserat främst på så kallade stetoclips.

Via mjukvaran Smaart v.7 Di simulerade jag upplevd frekvensgång hos olika lyssningstillbehör. Dessa uppmätta värden kompletterade jag sedan med lyssningstester.

Testresultaten ledde fram till utvecklingen av en prototypmodell. Via två olika testgrupper jämfördes prototypmodellen med de befintliga lyssningstillbehören. Testgruppernas tankar och åsikter ligger till grund för många av de slutsatser som dras i slutet av rapporten.

Abstract [en]

One of Bellman & Symfon’s products is the so–called personal amplifier. The personal amplifier is a hearing aid, which uses digital signal processing to amplify the sound level, while unwanted background noise is attenuated.

Standard listening accessories, such as headphones and ear buds, can be attached to the device via a 3,5 mm jack. The accessories offered by Bellman & Symfon today are simple and doesn’t match the quality of the personal amplifier.

In this project, I have examined which improvement can be made on these listening accessories, to make them better suit the needs of hearing impaired persons. My main focus has been on the so-called stetoclips, which lacks a lot of details in terms of sound quality.

I have simulated perceived frequency response via the software Smaart v.7 Di, and I combined these results with the results from different listening tests.

The test results lead to the development of a new prototype model.

Two different test groups compared the prototype to the current models, and gave me some very useful thoughts and opinions about the project.

Many of the conclusions drawn at the end of this project are based on the results from the two test groups.

Place, publisher, year, edition, pages
2014. , 30 p.
Keyword [en]
personal amplifiers, headphones, hearing, sound technology
Keyword [sv]
samtalsförstärkare, hörlurar, hörsel, ljudteknik
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kau:diva-34329OAI: oai:DiVA.org:kau-34329DiVA: diva2:755204
External cooperation
Bellman & Symfon
Educational program
Music and Sound Engineering, 180 hp
Supervisors
Examiners
Available from: 2014-10-20 Created: 2014-10-14 Last updated: 2014-10-20Bibliographically approved

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Daniel Fredrikson - Utveckling av lyssningstillbehör för samtalsförstärkare(16030 kB)179 downloads
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