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dc.creatorAdavanne, Sharath
dc.date.accessioned2011-10-24T11:26:11Z
dc.date.available2011-10-24T11:26:11Z
dc.date.issued2011-10-24
dc.identifier.urihttp://dspace.cc.tut.fi/dpub/handle/123456789/20707
dc.description.abstractRoom surface estimation is the process of estimating and characterizing the surfaces of a room from the measurement provided by an array of microphones. In any normal room, wavefront radiated by the source reaches the microphones after reflecting from the surfaces of the room. On performing the post processing on this recorded signal, depending on the type of source signal used; we obtain the unique signature of the room called the room impulse response (RIR). Historically room impulse responses have been used to calculate the acoustical parameters. These are generally used for objective evaluation of the rooms. Here is an effort to extract more information out of the RIR by understanding the physics of it. In this thesis the reflection from the surfaces is employed as useful information and methods to use this information are presented. The reflective information can be used in the determination of the reflection coefficient of the surface. The reflection coefficients of four common room materials are obtained from their respective impulse response at oblique incidence. The obtained reflection coefficients are studied for the classification of materials. The problem of estimating the room surface using the reflection coefficients has been approached in a systematic way, accounting for parasitic reflections and background noise. The room impulse response is obtained using the sine sweep signal transmitted through the speaker attached to one microphone array, and recorded by another microphone array. The recorded signal was used to identify possible surfaces using clustering on the obtained reflection coefficients. The classification so obtained is compared with the ground truth to calculate the performance and practicability. /Kir11en
dc.format.mimetypeapplication/pdf
dc.language.isoenen
dc.relation.isformatof50 p.en
dc.rightsThis publication is copyrighted. You may download, display and print it for Your own personal use. Commercial use is prohibited.en
dc.titleRoom Surface Estimation Using Reflection Coefficients Measured In-Situen
dc.typeDiplomityö
dc.identifier.urnURN:NBN:fi:tty-2011102414858
dc.revVisa, Ari
dc.revPertilä, Pasi
dc.thsPertilä, Pasi
dc.contributor.laitosSignaalinkäsittelyn laitos – Department of Signal Processingen
dc.contributor.tiedekuntaTieto- ja sähkötekniikan tiedekunta – Faculty of Computing and Electrical Engineering
dc.contributor.yliopistoTampereen teknillinen yliopisto - Tampere University of Technologyfi
dc.programmeMaster's Degree Programme in Information Technologyen
dc.date.published2011-10-05
dc.contributor.laitoskoodisgn


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