Do wavelet filters provide more accurate estimates of reverberation times at low frequencies

Manuel A. Sobreira Seoane; David Pérez Cabo; Finn T. Agerkvist

Do wavelet filters provide more accurate estimates of reverberation times at low frequencies

Manuel A. Sobreira Seoane, David Pérez Cabo, Finn T. Agerkvist

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

Abstract

It has been amply demonstrated in the literature that it is not possible to measure acoustic decays without significant errors for low BT values (narrow filters and or low reverberation times). Recently, it has been shown how the main source of distortion in the time envelope of the acoustic decay is the frequency dependent group delay of the common implementations of the 1/3 and 1/1 octave filters. Some authors report good results using wavelet filter banks as an alternative to the usual filters. In this paper, a critical review of the performance of wavelet filter banks is undertaken. A filter bank using the continuous wavelet transform (CTW) has been implemented using a Morlet mother function. Although in general, the wavelet filter bank performs better than the usual filters, the influence of decaying modes outside the filter bandwidth on the measurements has been detected, leading to a biased estimation of the reverberation time in the frequency band of interest.

Original language	English
Title of host publication	Proceedings of the Inter-noise 2016
Editors	Wolfgang Kropp
Publisher	German Acoustical Society (DEGA)
Publication date	2016
Pages	1088-1096
ISBN (Electronic)	978-3-939296-11-9
Publication status	Published - 2016
Event	45th International Congress and Exposition on Noise Control Engineering - Hamburg, Germany Duration: 21 Aug 2016 → 24 Aug 2016 Conference number: 45 http://www.internoise2016.org/

Conference

Conference	45th International Congress and Exposition on Noise Control Engineering
Number	45
Country/Territory	Germany
City	Hamburg
Period	21/08/2016 → 24/08/2016
Internet address	http://www.internoise2016.org/

Keywords

Acoustics and Ultrasonics
Acoustic decay
Continous wavelet transform
Reverberation time
Wavelets
Acoustic noise
Acoustic variables control
Architectural acoustics
Bandpass filters
Filter banks
Frequency bands
Frequency estimation
Reverberation
Wavelet transforms
Acoustic decays
Biased estimation
Continous wavelet transforms
Continuous Wavelet Transform
Frequency dependent
Wavelet filter banks
Group delay

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title = "Do wavelet filters provide more accurate estimates of reverberation times at low frequencies",

abstract = "It has been amply demonstrated in the literature that it is not possible to measure acoustic decays without significant errors for low BT values (narrow filters and or low reverberation times). Recently, it has been shown how the main source of distortion in the time envelope of the acoustic decay is the frequency dependent group delay of the common implementations of the 1/3 and 1/1 octave filters. Some authors report good results using wavelet filter banks as an alternative to the usual filters. In this paper, a critical review of the performance of wavelet filter banks is undertaken. A filter bank using the continuous wavelet transform (CTW) has been implemented using a Morlet mother function. Although in general, the wavelet filter bank performs better than the usual filters, the influence of decaying modes outside the filter bandwidth on the measurements has been detected, leading to a biased estimation of the reverberation time in the frequency band of interest.",

keywords = "Acoustics and Ultrasonics, Acoustic decay, Continous wavelet transform, Reverberation time, Wavelets, Acoustic noise, Acoustic variables control, Architectural acoustics, Bandpass filters, Filter banks, Frequency bands, Frequency estimation, Reverberation, Wavelet transforms, Acoustic decays, Biased estimation, Continous wavelet transforms, Continuous Wavelet Transform, Frequency dependent, Wavelet filter banks, Group delay",

author = "{Sobreira Seoane}, {Manuel A.} and {P{\'e}rez Cabo}, David and Agerkvist, {Finn T.}",

year = "2016",

language = "English",

pages = "1088--1096",

editor = "Kropp, {Wolfgang }",

booktitle = "Proceedings of the Inter-noise 2016",

publisher = "German Acoustical Society (DEGA)",

note = "45th International Congress and Exposition on Noise Control Engineering, INTER-NOISE 2016 ; Conference date: 21-08-2016 Through 24-08-2016",

url = "http://www.internoise2016.org/",

}

Do wavelet filters provide more accurate estimates of reverberation times at low frequencies. / Sobreira Seoane, Manuel A.; Pérez Cabo, David; Agerkvist, Finn T.
Proceedings of the Inter-noise 2016 . ed. / Wolfgang Kropp. German Acoustical Society (DEGA), 2016. p. 1088-1096.

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

TY - GEN

T1 - Do wavelet filters provide more accurate estimates of reverberation times at low frequencies

AU - Sobreira Seoane, Manuel A.

AU - Pérez Cabo, David

AU - Agerkvist, Finn T.

N1 - Conference code: 45

PY - 2016

Y1 - 2016

N2 - It has been amply demonstrated in the literature that it is not possible to measure acoustic decays without significant errors for low BT values (narrow filters and or low reverberation times). Recently, it has been shown how the main source of distortion in the time envelope of the acoustic decay is the frequency dependent group delay of the common implementations of the 1/3 and 1/1 octave filters. Some authors report good results using wavelet filter banks as an alternative to the usual filters. In this paper, a critical review of the performance of wavelet filter banks is undertaken. A filter bank using the continuous wavelet transform (CTW) has been implemented using a Morlet mother function. Although in general, the wavelet filter bank performs better than the usual filters, the influence of decaying modes outside the filter bandwidth on the measurements has been detected, leading to a biased estimation of the reverberation time in the frequency band of interest.

AB - It has been amply demonstrated in the literature that it is not possible to measure acoustic decays without significant errors for low BT values (narrow filters and or low reverberation times). Recently, it has been shown how the main source of distortion in the time envelope of the acoustic decay is the frequency dependent group delay of the common implementations of the 1/3 and 1/1 octave filters. Some authors report good results using wavelet filter banks as an alternative to the usual filters. In this paper, a critical review of the performance of wavelet filter banks is undertaken. A filter bank using the continuous wavelet transform (CTW) has been implemented using a Morlet mother function. Although in general, the wavelet filter bank performs better than the usual filters, the influence of decaying modes outside the filter bandwidth on the measurements has been detected, leading to a biased estimation of the reverberation time in the frequency band of interest.

KW - Acoustics and Ultrasonics

KW - Acoustic decay

KW - Continous wavelet transform

KW - Reverberation time

KW - Wavelets

KW - Acoustic noise

KW - Acoustic variables control

KW - Architectural acoustics

KW - Bandpass filters

KW - Filter banks

KW - Frequency bands

KW - Frequency estimation

KW - Reverberation

KW - Wavelet transforms

KW - Acoustic decays

KW - Biased estimation

KW - Continous wavelet transforms

KW - Continuous Wavelet Transform

KW - Frequency dependent

KW - Wavelet filter banks

KW - Group delay

M3 - Article in proceedings

SP - 1088

EP - 1096

BT - Proceedings of the Inter-noise 2016

A2 - Kropp, Wolfgang

PB - German Acoustical Society (DEGA)

T2 - 45th International Congress and Exposition on Noise Control Engineering

Y2 - 21 August 2016 through 24 August 2016

ER -

Do wavelet filters provide more accurate estimates of reverberation times at low frequencies

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Conference

Keywords

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