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Paper Abstract and Keywords
Presentation 2020-03-03 12:35
Real-time visualization of reverberation time using frequency domain variants of velvet noise
Hideki Kawahara (Wakayama Univ.), Ken-Ichi Sakakibara (Health Science Univ. Hokkaido), Mitsunori Mizumachi (Kyushu Inst. Tech.), Masanori Morise (Meiji Univ.), Hideki Banno (Meijo Univ.) EA2019-159 SIP2019-161 SP2019-108
Abstract (in Japanese) (See Japanese page) 
(in English) We introduce a wavelet-based method for real-time visualization of reverberation time for extending acoustic measurement based on the frequency domain variant of velvet noise (FVN). For application to acoustic measurement, we introduced a method to construct orthogonal set of sequences by allocating individual FVNs with orthogonal binary sequences for weighting. The proposed set of sequences enable simultaneous measurement of multiple acoustic paths. The mixture of the set also enables one-shot measurement of linear and non-linear responses of an acoustic system. In addition to these merit, we introduce a method to calculate the four-times longer impulse response than the allocation interval. We discuss about integration of the proposed method to the interactive and real-time acoustic measurement tool based on FVN. We also discuss about failure of group-delay for estimating reverberation time from the acoustic impulse response.
Keyword (in Japanese) (See Japanese page) 
(in English) impulse response / frequency domain variant of velvet noise / reverberation time / group delay / wavelet transform / / /  
Reference Info. IEICE Tech. Rep., vol. 119, no. 439, EA2019-159, pp. 337-342, March 2020.
Paper # EA2019-159 
Date of Issue 2020-02-24 (EA, SIP, SP) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
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reproduction
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF EA2019-159 SIP2019-161 SP2019-108

Conference Information
Committee SP EA SIP  
Conference Date 2020-03-02 - 2020-03-03 
Place (in Japanese) (See Japanese page) 
Place (in English) Okinawa Industry Support Center 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To EA 
Conference Code 2020-03-SP-EA-SIP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Real-time visualization of reverberation time using frequency domain variants of velvet noise 
Sub Title (in English)  
Keyword(1) impulse response  
Keyword(2) frequency domain variant of velvet noise  
Keyword(3) reverberation time  
Keyword(4) group delay  
Keyword(5) wavelet transform  
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1st Author's Name Hideki Kawahara  
1st Author's Affiliation Wakayama University (Wakayama Univ.)
2nd Author's Name Ken-Ichi Sakakibara  
2nd Author's Affiliation Health Science University of Hokkaido (Health Science Univ. Hokkaido)
3rd Author's Name Mitsunori Mizumachi  
3rd Author's Affiliation Kyushu Institute of Technology (Kyushu Inst. Tech.)
4th Author's Name Masanori Morise  
4th Author's Affiliation Meiji Universityi (Meiji Univ.)
5th Author's Name Hideki Banno  
5th Author's Affiliation Meijo University (Meijo Univ.)
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Speaker Author-1 
Date Time 2020-03-03 12:35:00 
Presentation Time 25 minutes 
Registration for EA 
Paper # EA2019-159, SIP2019-161, SP2019-108 
Volume (vol) vol.119 
Number (no) no.439(EA), no.440(SIP), no.441(SP) 
Page pp.337-342 
#Pages
Date of Issue 2020-02-24 (EA, SIP, SP) 


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