Energy decay curves in reverberation chambers and the influence of scattering objects on the absorption coefficient of a sample

Jamilla Balint, Florian Muralter, Melanie Nolan, Cheol-Ho Jeong

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

This work deals with the multi-exponential nature of energy decay curves in reverberation chambers. Impulse response measurements have been carried out with different room and sample configurations to investigate the effect of scattering elements and the position of the absorber on the slopes and bending points of the energy decay curve. In this context Annex A of ISO 354 is discussed also. The reverberation time is calculated by fitting a sum of exponentials to the data instead of using conventional parameters obtained with linear regression. The absorption coefficient is calculated with the reverberation time obtained from the initial part of the energy decay. The results are compared with theoretically obtained values, also considering the size effect.
Original languageEnglish
Title of host publicationEuronoise 2018 - Conference Proceeding
Number of pages6
PublisherEuropean Acoustics Association
Publication date2018
Publication statusPublished - 2018
EventEuronoise 2018 - Convention Center Creta Maris, Hersonissos, Crete, Greece
Duration: 27 May 201831 May 2018

Conference

ConferenceEuronoise 2018
LocationConvention Center Creta Maris
CountryGreece
CityHersonissos, Crete
Period27/05/201831/05/2018

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