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Paper Abstract and Keywords
Presentation 2015-11-12 13:00
Estimation of sound pressure levels of direct sound and reflected sounds based on single-channel signal separation
Irwansyah, Taira Onoguchi, Yoshifumi Chisaki (Kumamoto Univ.) EA2015-24 EMM2015-45
Abstract (in Japanese) (See Japanese page) 
(in English) Recent studies have shown that the reflected sounds from nearby buildings affect the speech intelligibility of public address (PA) systems. Therefore, the PA system volumes and the loudspeaker directions should be adjusted to compensate for the effect of reflected sounds which can change over time due to building construction. This study aims at estimating the sound pressure levels (SPLs) of direct sound and reflected sounds that can be taken as a consideration before adjusting the PA systems. This paper proposes an approach for separating direct sound and reflected sounds that employs time-frequency information of a single-channel signal. This method consists of three steps: (1) the estimation of time difference of arrivals (TDOAs) between direct sound and reflected sounds, (2) the estimation of reflected-to-direct gain ratios (RDRs), and (3) the single-channel signal separation based on (1) and (2) in frequency domain. Numerical tests were conducted to evaluate the performance of the proposed method. The results show that the proposed method is able to separate direct sound and up to five reflected sounds as well as estimate its SPLs.
Keyword (in Japanese) (See Japanese page) 
(in English) Sound pressure level / Single-channel signal / Direct sound / Reflected sound / Time difference of arrivals / / /  
Reference Info. IEICE Tech. Rep., vol. 115, no. 302, EA2015-24, pp. 1-6, Nov. 2015.
Paper # EA2015-24 
Date of Issue 2015-11-05 (EA, EMM) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
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)
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Conference Information
Committee EA EMM  
Conference Date 2015-11-12 - 2015-11-13 
Place (in Japanese) (See Japanese page) 
Place (in English) Kumamoto Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Multimedia Fusion, Content Processing, Multimedia Retrieval, Digital Watermarking, and Related Topics 
Paper Information
Registration To EA 
Conference Code 2015-11-EA-EMM 
Language English 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Estimation of sound pressure levels of direct sound and reflected sounds based on single-channel signal separation 
Sub Title (in English)  
Keyword(1) Sound pressure level  
Keyword(2) Single-channel signal  
Keyword(3) Direct sound  
Keyword(4) Reflected sound  
Keyword(5) Time difference of arrivals  
1st Author's Name Irwansyah  
1st Author's Affiliation Kumamoto University (Kumamoto Univ.)
2nd Author's Name Taira Onoguchi  
2nd Author's Affiliation Kumamoto University (Kumamoto Univ.)
3rd Author's Name Yoshifumi Chisaki  
3rd Author's Affiliation Kumamoto University (Kumamoto Univ.)
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Speaker Author-1 
Date Time 2015-11-12 13:00:00 
Presentation Time 30 minutes 
Registration for EA 
Paper # EA2015-24, EMM2015-45 
Volume (vol) vol.115 
Number (no) no.302(EA), no.303(EMM) 
Page pp.1-6 
Date of Issue 2015-11-05 (EA, EMM) 

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