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Paper Abstract and Keywords
Presentation 2011-10-29 11:45
Methods for Binaural Recording and Reproduction by Earplug Type Electroacoustic Transducers
Ryosuke Sato, Shogo Kambe, Kenji Furihata (Shinshu Univ) EA2011-81
Abstract (in Japanese) (See Japanese page) 
(in English) Individual HRTFs are almost universally measured with blocked or partially blocked ear canals. However, accuracy of frequency response at the eardrum is essential for correct localization with binaural hearing, that is to say “record the sound pressure at the eardrum of a listener and then reproduce the exact same sound pressure on playback”. Therefore, a probe (a soft silicon medical tubing; the internal diameter 0.5mm, external diameter 1mm and length 42mm) microphone (Knowles TO-30031) was developed that allows comfortable measurements at the eardrum. The compact probe microphone can sit very close to the eardrum with no discomfort, and no disturbance of normal hearing. In this paper, an earplug type earphone system for a virtual reality system was proposed, and individual earplug type earphone equalization is obtained in the same way. The sound pressure levels at the 11 listener’s eardrums as a function of frequency were measured, and constructed an inverse filter (adaptive filter) for the earplug type earphone. The results suggest that individual inverse-filtering characteristics shall be designed for a virtual reality system.
Keyword (in Japanese) (See Japanese page) 
(in English) Earplug type electroacoustic transducers / Transfer function of external auditory canal / Sound pressure at the position of the eardrum / Adaptive filter / Head Related Transfer Function / / /  
Reference Info. IEICE Tech. Rep., vol. 111, no. 270, EA2011-81, pp. 79-84, Oct. 2011.
Paper # EA2011-81 
Date of Issue 2011-10-21 (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 2011-10-28 - 2011-10-29 
Place (in Japanese) (See Japanese page) 
Place (in English) Faculty of Engineering, Shinshu Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) General Topics 
Paper Information
Registration To EA 
Conference Code 2011-10-EA 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Methods for Binaural Recording and Reproduction by Earplug Type Electroacoustic Transducers 
Sub Title (in English)  
Keyword(1) Earplug type electroacoustic transducers  
Keyword(2) Transfer function of external auditory canal  
Keyword(3) Sound pressure at the position of the eardrum  
Keyword(4) Adaptive filter  
Keyword(5) Head Related Transfer Function  
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Keyword(7)  
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1st Author's Name Ryosuke Sato  
1st Author's Affiliation Shinshu University (Shinshu Univ)
2nd Author's Name Shogo Kambe  
2nd Author's Affiliation Shinshu University (Shinshu Univ)
3rd Author's Name Kenji Furihata  
3rd Author's Affiliation Shinshu University (Shinshu Univ)
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Speaker
Date Time 2011-10-29 11:45:00 
Presentation Time 30 
Registration for EA 
Paper # IEICE-EA2011-81 
Volume (vol) IEICE-111 
Number (no) no.270 
Page pp.79-84 
#Pages IEICE-6 
Date of Issue IEICE-EA-2011-10-21 


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