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Utvärdering av mikrofon- och högtalarelement för högtalartelefonsapplikation
Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
2012 (Swedish)Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesisAlternative title
Evaluation of microphone and speaker driver for speakerphone application (English)
Abstract [en]

The project deals with the evaluation and testing of speaker and microphone elements as well as microphone cavity.The first part of the report comprises a comprehensive theoretical part about drivers, microphone elements, and to some extent microphone cavity.The goal was to , on the behalf of the company Limes Audio AB, develop proposals on microphone element and cavity as well as drivers for a speakerphone application, based on specific factors. The main factors were performance, price and form factor.The aim was to create the best possible conditions for Limes Audio's software developers to implement the company's audio-enhancing software, mainly adaptive echo cancellation.The testing was carried out using Adobe Audition and MatLab. The test methods were developed in conjunction with Limes Audio and are described below.The project will result in suggestions for a speaker, a microphone and a cavity. The cavity were removed from the product because the results indicated that the cavity matter little for the end result.The report concludes with a discussion on how the measurements could have been enhanced to simplify the interpretation of the results and making the testing more efficient.

Abstract [sv]

Projektet behandlar utvärdering och testning av högtalar- och mikrofonelement samt mikrofonkavitet.Första delen av rapporten består i en omfattande teoridel kring högtalarelement, mikrofonelement samt i viss mån även mikrofonkavitet.Målet var att för företaget Limes Audio AB ta fram förslag på mikrofonelement och kavitet samt högtalarelement för en högtalartelefonsapplikation, utifrån givna faktorer. De viktigaste faktorerna var prestanda, pris och formfaktor. Syftet var att skapa så bra förutsättningar som möjligt för Limes Audios mjukvaruutvecklare att implementera företagets ljudförbättrande mjukvara, främst adaptiv eko-cancellering. I genomförandet användes programvaran Adobe Audition samt MatLab. Testmetoderna utvecklades tillsammans med Limes Audio och står beskrivna nedan. Projektet resulterar i förslag på en högtalare, en mikrofon samt en kavitet. Kaviteten tas sedan bort ur produkten på grund av att resultaten från urprovningen pekade på att kaviteten spelar liten roll för slutresultatet.Rapporten avslutas med en diskussion kring hur främst mätningarna hade kunnat förbättrats för att förenkla tolkningen av resultatet och effektivisera genomförandet.

Place, publisher, year, edition, pages
2012. , 59 p.
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:umu:diva-58129OAI: oai:DiVA.org:umu-58129DiVA: diva2:547011
External cooperation
Limes Audio AB
Educational program
Bachelor of Science in Applied Electronics
Uppsok
Technology
Supervisors
Examiners
Available from: 2012-08-26 Created: 2012-08-26 Last updated: 2012-08-26Bibliographically approved

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