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Paper Abstract and Keywords
Presentation 2008-10-24 13:30
Relationship between hearing sensitivity characteristic and reality of reproduced sound by the 5.1ch surround system
Daisuke Morikawa, Tatsuya Hirahara (Toyama Pref. Univ.), Makoto Otani (RIEC. Tohoku Univ.) EA2008-80
Abstract (in Japanese) (See Japanese page) 
(in English) A 5.1-channel surround system has been popularly used as a sound reproduction system. This paper clarifies how much the perceptual “reality” of the reproduced sound differs among listeners and how the signal bandwidth affects the “reality” of the sound. First, hearing thresholds from 125 Hz to 18 kHz are measured for listeners ranging in age from 19 to 52. As generally known, ability to hear high frequencies degrades among aged listeners. Second, listeners in different age-range are compared with respect to the “reality” of the reproduced original sound and low-pass or high-pass filtered sounds; the original sound signal is extracted from one scene of a cinema. Younger listener’s responses was that the narrower the bandwidth the less the “reality”, whereas aged listeners hardly distinguish differences among original sounds and low-pass filtered (fc = 8, 16 kHz) sounds. Results are similar when surround headphones are used, whereas filtering effects are small when sounds are reproduced by a binaural system using head-related transfer function.
Keyword (in Japanese) (See Japanese page) 
(in English) surround / 5.1ch / hearing sensitivity characteristic / reality / / / /  
Reference Info. IEICE Tech. Rep., vol. 108, no. 255, EA2008-80, pp. 91-96, Oct. 2008.
Paper # EA2008-80 
Date of Issue 2008-10-16 (EA) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
and
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)
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Conference Information
Committee EA  
Conference Date 2008-10-23 - 2008-10-24 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
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Paper Information
Registration To EA 
Conference Code 2008-10-EA 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Relationship between hearing sensitivity characteristic and reality of reproduced sound by the 5.1ch surround system 
Sub Title (in English)  
Keyword(1) surround  
Keyword(2) 5.1ch  
Keyword(3) hearing sensitivity characteristic  
Keyword(4) reality  
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1st Author's Name Daisuke Morikawa  
1st Author's Affiliation Toyama Prefectural University (Toyama Pref. Univ.)
2nd Author's Name Tatsuya Hirahara  
2nd Author's Affiliation Toyama Prefectural University (Toyama Pref. Univ.)
3rd Author's Name Makoto Otani  
3rd Author's Affiliation Research Institute of Electrical Communication Tohoku University (RIEC. Tohoku Univ.)
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Speaker Author-1 
Date Time 2008-10-24 13:30:00 
Presentation Time 30 minutes 
Registration for EA 
Paper # EA2008-80 
Volume (vol) vol.108 
Number (no) no.255 
Page pp.91-96 
#Pages 6 
Date of Issue 2008-10-16 (EA) 

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