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Paper Abstract and Keywords
Presentation 2009-06-26 13:30
Optical measurement of tympanic membrane vibration in human under bone-conducted ultrasonic stimulation
Kazuhito Ito, Seiji Nakagawa (AIST) EA2009-30
Abstract (in Japanese) (See Japanese page) 
(in English) Tympanic membrane (TM) vibrations under bone-conducted ultrasonic (BCU) stimuli were measured in a human subject using a laser Doppler vibrometer (LDV). We presented an signal processing algorithm to increase the SNRs (signal-to-noise ratios) of measured LDV signals by removing only optical noise components from the signals. Further, to clarify the factors of BCU perception, we analyzed the TM vibrations using the presented method to investigate the contribution of nonlinear distortion in bone conduction, i.e. the possibility of generating the audible subharmonics. As a result, we did not find any audible signals corresponding to the subjective pitch of BCU in the TM vibrations. This suggests that there is no evidence for the osseotympanic route with nonlinear distortion.
Keyword (in Japanese) (See Japanese page) 
(in English) bone-conducted ultrasound / pitch perception / tympanic membrane vibration / subharmonics / laser Doppler vibrometer / / /  
Reference Info. IEICE Tech. Rep., vol. 109, no. 100, EA2009-30, pp. 73-78, June 2009.
Paper # EA2009-30 
Date of Issue 2009-06-18 (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 EA2009-30

Conference Information
Committee EA  
Conference Date 2009-06-25 - 2009-06-26 
Place (in Japanese) (See Japanese page) 
Place (in English)  
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Paper Information
Registration To EA 
Conference Code 2009-06-EA 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Optical measurement of tympanic membrane vibration in human under bone-conducted ultrasonic stimulation 
Sub Title (in English)  
Keyword(1) bone-conducted ultrasound  
Keyword(2) pitch perception  
Keyword(3) tympanic membrane vibration  
Keyword(4) subharmonics  
Keyword(5) laser Doppler vibrometer  
1st Author's Name Kazuhito Ito  
1st Author's Affiliation National Institute of Advanced Industrial Science and Technology (AIST)
2nd Author's Name Seiji Nakagawa  
2nd Author's Affiliation National Institute of Advanced Industrial Science and Technology (AIST)
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Date Time 2009-06-26 13:30:00 
Presentation Time 30 
Registration for EA 
Paper # IEICE-EA2009-30 
Volume (vol) IEICE-109 
Number (no) no.100 
Page pp.73-78 
#Pages IEICE-6 
Date of Issue IEICE-EA-2009-06-18 

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