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Paper Abstract and Keywords
Presentation 2011-10-29 09:30
Effectiveness of Horn Speakers for Multi-way System in Car Audio Systems
Masahiro Mitsuishi, Kenji Furihata (Shinshu Univ.) EA2011-77
Abstract (in Japanese) (See Japanese page) 
(in English) Many cars have acoustic problems that interfere with an in-dash receiver's ability to produce clear, well-balanced sound. For listeners, several loudspeakers are positioned asymmetrically. Compared to an ordinary listening room, an automobile presents a very different acoustic environment. Doors are acceptable for midbasses playing below 500Hz[1], but are poor for midranges of any kind. Therefore, in this paper, for placing a sweet spot for the sounds at the driver seat and the passenger seat, a multi-way system with four small horn tweeters on the dashboard panel is proposed. To minimize the sound interference between the seat places, a small horn loudspeaker is designed and made that the low-cut frequency is 500Hz, the half value angle of directional characteristic is less 50 degree, and the size is 34mm height × 72.6mm width ×120mm length. The horn tweeters for a multi-way system were experimentally discussed whether is effective to produce clear and well-balanced sound. The results suggest that an effective control method for a resonance phenomenon of about Q=10 with the horn tweeters is one way to use an acoustic absorption material, and the multi-way system combined the four horn tweeters is more effective than a typical car audio system in sound quality.
Keyword (in Japanese) (See Japanese page) 
(in English) Car audio system / Sweet spot / Multi-way system / Horn speaker / Acoustic absorption material / / /  
Reference Info. IEICE Tech. Rep., vol. 111, no. 270, EA2011-77, pp. 55-60, Oct. 2011.
Paper # EA2011-77 
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)
Download PDF EA2011-77

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) Effectiveness of Horn Speakers for Multi-way System in Car Audio Systems 
Sub Title (in English)  
Keyword(1) Car audio system  
Keyword(2) Sweet spot  
Keyword(3) Multi-way system  
Keyword(4) Horn speaker  
Keyword(5) Acoustic absorption material  
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1st Author's Name Masahiro Mitsuishi  
1st Author's Affiliation Shinshu University (Shinshu Univ.)
2nd Author's Name Kenji Furihata  
2nd Author's Affiliation Shinshu University (Shinshu Univ.)
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Speaker Author-1 
Date Time 2011-10-29 09:30:00 
Presentation Time 30 minutes 
Registration for EA 
Paper # EA2011-77 
Volume (vol) vol.111 
Number (no) no.270 
Page pp.55-60 
#Pages 6 
Date of Issue 2011-10-21 (EA) 

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