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Paper Abstract and Keywords
Presentation 2021-07-15 16:00
Acoustic characteristics of a face mask invented for the purpose of not impairing speech clarity
Hiroki Matsuzaki (HUS) EA2021-10
Abstract (in Japanese) (See Japanese page) 
(in English) Due to the epidemic of the new coronavirus infection (COVID-19), wearing a mask is required in daily life to prevent the infection, and it has become necessary to have a conversation while wearing the mask. Cloth, paper, urethane, etc. used as the material of the mask may suppress the vibration of the sound and absorb it, which may impair the clarity of the spoken voice when the mask is worn. Unclear voice not only interrupts smooth conversation by re-listening, but also increases the risk of infection by removing the mask and talking. In order to solve the above problems, a patent application has been filed for the invention of a "face mask clearly transmitting voice" that maintains the original function of the mask and does not impair the clarity of voice even when talking while wearing the mask. There was an opportunity to examine the speech clarity of sound passing through the "face mask clearly transmitting voice" in a TV program plan, and acoustic measurements of the sound passing through the "face mask clearly transmitting voice", a non-woven fabric mask and a face shield were performed. From the experiment results, it was shown that the face shield attenuates the components in the higher frequency range than about 2 kHz and both masks from 4 kHz to 5 kHz. It was also shown that the "face mask clearly transmitting voice" had a larger attenuation than the non-woven fabric mask, however, strengthened the components in the 3kHz to 4kHz band.
Keyword (in Japanese) (See Japanese page) 
(in English) face mask / face shield / speech clarity / acoustic characteristics / / / /  
Reference Info. IEICE Tech. Rep., vol. 121, no. 112, EA2021-10, pp. 47-52, July 2021.
Paper # EA2021-10 
Date of Issue 2021-07-08 (EA) 
ISSN 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)
Download PDF EA2021-10

Conference Information
Committee EA ASJ-H  
Conference Date 2021-07-15 - 2021-07-16 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Engineering/Electro Acoustics, Psychological and Physiological Acoustics, Speech, Musical Acoustics, Education in Acoustics, and Related Topics 
Paper Information
Registration To EA 
Conference Code 2021-07-EA-H 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Acoustic characteristics of a face mask invented for the purpose of not impairing speech clarity 
Sub Title (in English)  
Keyword(1) face mask  
Keyword(2) face shield  
Keyword(3) speech clarity  
Keyword(4) acoustic characteristics  
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1st Author's Name Hiroki Matsuzaki  
1st Author's Affiliation Hokkaido University of Science (HUS)
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Speaker Author-1 
Date Time 2021-07-15 16:00:00 
Presentation Time 25 minutes 
Registration for EA 
Paper # EA2021-10 
Volume (vol) vol.121 
Number (no) no.112 
Page pp.47-52 
#Pages 6 
Date of Issue 2021-07-08 (EA) 

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