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Paper Abstract and Keywords
Presentation 2016-08-10 13:20
Detection threshold of pure tone during sound localization with head movement
Yukio Iwaya (Tohoku Gkuin Univ.), Akio Honda (Yamanashi Eiwa Univ.), Yusuke Ozaki (Tohoku Gkuin Univ.) EA2016-29
Abstract (in Japanese) (See Japanese page) 
(in English) We can localize a sound position with both ears (sound localization ability). It is known the characteristics between a sound source and ears as head-related transfer functions (HRTFs). The sound localization can be realized with HRTFs empirically. In addition, the sound localization precision will be increased when we localize a sound with head movement. It may be said that not only HRTFs but also dynamic cues from head movement are an important in sound localization. The sound localization process with dynamic cue is called as ‘active listening process.’ Recently, active listening process is actively being investigated. In sense of vision, input stimulus are suppressed in saccadic movement of eyes (saccadic suppression). On the analogy of the saccadic suppression, auditory stimulus may be suppressed in active listening process.
Therefore, we investigated the change of detection threshold of pure tone in the active sound localization. From one of five loudspeakers, a band-limited white noise was emitted to a listener. She/he was asked to localize the sound with/without head movement. Another loudspeaker was set directly above listener’s head. From the top loudspeaker, a pure tone (1 kHz/ 500 Hz) was radiated. The listener was also asked to judge the existence of the pure tone. The detection threshold was estimated from the collected answers by drawing accumulated normal distribution. From the results, we found the detection threshold in 500 Hz was 1-1.5 dB increased when listener localized a sound with head movement. It may suggest sound stimulus in active listening is suppressed.
Keyword (in Japanese) (See Japanese page) 
(in English) Sound localization / head movement / detection threshold of a pure tone / / / / /  
Reference Info. IEICE Tech. Rep., vol. 116, no. 179, EA2016-29, pp. 55-58, Aug. 2016.
Paper # EA2016-29 
Date of Issue 2016-08-02 (EA) 
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)
Download PDF EA2016-29

Conference Information
Committee EA ASJ-H  
Conference Date 2016-08-09 - 2016-08-10 
Place (in Japanese) (See Japanese page) 
Place (in English) Tohoku Gakuin Univ., Tagajo Campus 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Ultra-Realistic Acoustics, Engineering/Electro Acoustics, Psychological and Physiological Acoustics, and Related Topics 
Paper Information
Registration To EA 
Conference Code 2016-08-EA-H 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Detection threshold of pure tone during sound localization with head movement 
Sub Title (in English)  
Keyword(1) Sound localization  
Keyword(2) head movement  
Keyword(3) detection threshold of a pure tone  
1st Author's Name Yukio Iwaya  
1st Author's Affiliation Tohoku Gakuin University (Tohoku Gkuin Univ.)
2nd Author's Name Akio Honda  
2nd Author's Affiliation Yamanashi Eiwa University (Yamanashi Eiwa Univ.)
3rd Author's Name Yusuke Ozaki  
3rd Author's Affiliation Tohoku Gakuin University (Tohoku Gkuin Univ.)
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Speaker Author-1 
Date Time 2016-08-10 13:20:00 
Presentation Time 30 minutes 
Registration for EA 
Paper # EA2016-29 
Volume (vol) vol.116 
Number (no) no.179 
Page pp.55-58 
Date of Issue 2016-08-02 (EA) 

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