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Paper Abstract and Keywords
Presentation 2020-08-07 14:05
Influence of the existense of beamforming for low frequency region on sound quality in sound-space acquisition
Kanji Watanabe, Masayuki Nishiguchi, Shouichi Takane, Koji Abe (Akita Pref. Univ.) EA2020-16
Abstract (in Japanese) (See Japanese page) 
(in English) This study is aiming at the realization of spatial sound acquisition and reproduction system that can reproduce a certain sound field in another space. In our proposed method, the beamforming techniques for the directional sound acquisition are applied to signals obtained by microphone arrays. This processing is comprehensively performed in all direction, and the system acquires signals for each direction of arrival. Since each signal obtained by beamforming is considered as one coming from a corresponding sound source, the head-related transfer functions (HRTFs) are convolved to synthesized the sound images. Then, the binaural signals are synthesized by summation all processed signals. In our system, it is necessary to install the wide microphone intervals for low frequency range to achieve uniform directivity characteristics regardless of frequency. That means an unrealistically huge array is needed. We investigate whether a smaller array can be realized by omitting the beamforming process in low frequency range. In our previous investigations, the results of the subjective experiments showed that no beamforming required in the region of frequencies lower than 600~Hz. In this report, the further experiments showed that the beamforming with smaller array than suitable size applied to the region of frequencies between 600 and 1200~Hz did not significantly influence on auditory evaluation.
Keyword (in Japanese) (See Japanese page) 
(in English) microphone array / beamforming / spatial sound aquisition and reproduction / / / / /  
Reference Info. IEICE Tech. Rep., vol. 120, no. 128, EA2020-16, pp. 15-22, Aug. 2020.
Paper # EA2020-16 
Date of Issue 2020-07-31 (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 EA2020-16

Conference Information
Committee EA ASJ-H  
Conference Date 2020-08-07 - 2020-08-07 
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, and Related Topics 
Paper Information
Registration To EA 
Conference Code 2020-08-EA-H 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Influence of the existense of beamforming for low frequency region on sound quality in sound-space acquisition 
Sub Title (in English)  
Keyword(1) microphone array  
Keyword(2) beamforming  
Keyword(3) spatial sound aquisition and reproduction  
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1st Author's Name Kanji Watanabe  
1st Author's Affiliation Akita Prefectural University (Akita Pref. Univ.)
2nd Author's Name Masayuki Nishiguchi  
2nd Author's Affiliation Akita Prefectural University (Akita Pref. Univ.)
3rd Author's Name Shouichi Takane  
3rd Author's Affiliation Akita Prefectural University (Akita Pref. Univ.)
4th Author's Name Koji Abe  
4th Author's Affiliation Akita Prefectural University (Akita Pref. Univ.)
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Speaker Author-1 
Date Time 2020-08-07 14:05:00 
Presentation Time 25 minutes 
Registration for EA 
Paper # EA2020-16 
Volume (vol) vol.120 
Number (no) no.128 
Page pp.15-22 
#Pages 8 
Date of Issue 2020-07-31 (EA) 

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