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Paper Abstract and Keywords
Presentation 2011-11-19 10:30
Distance measurement method measurable from 0m based on power spectrum fluctuation of the interference sound for 1ch observations
Noboru Nakasako, Keiji Kawanishi, Toshihiro Shinohara, Tetsuji Uebo (Kinki Univ.) EA2011-92
Abstract (in Japanese) (See Japanese page) 
(in English) In many engineering fields, distance to target is very important information. Typical distance measurement methods use time delay between transmitted and reflected waves, but it is difficult to estimate short distance. On the other hand, a method for measuring short distances using phase interference, which is generated by phase interference of transmitted and reflected waves, is known in the field of microwave radar. However, the minimum measurable distance depends on the bandwidth of transmitted wave. The shorter distance measurement requires the wider bandwith of the transmitted wave. The authors have already proposed the distance eastimation method so as to be able to measure a distance close to 0m, but the method requires two microphones. This paper describes a new distance estimation method measurerable from 0m only using the single microphone. More concretely, we introduce a complex analytic signal instead of power specrum and examine the validity and effectiveness of our method by applying it to an actual sound field.
Keyword (in Japanese) (See Japanese page) 
(in English) phase interference / distance estimation / power spectrum / phase spectrum / range spectrum / 0m / /  
Reference Info. IEICE Tech. Rep., vol. 111, no. 306, EA2011-92, pp. 61-66, Nov. 2011.
Paper # EA2011-92 
Date of Issue 2011-11-11 (EA) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
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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 2011-11-18 - 2011-11-19 
Place (in Japanese) (See Japanese page) 
Place (in English) Kumamoto Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) General Topics 
Paper Information
Registration To EA 
Conference Code 2011-11-EA 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Distance measurement method measurable from 0m based on power spectrum fluctuation of the interference sound for 1ch observations 
Sub Title (in English)  
Keyword(1) phase interference  
Keyword(2) distance estimation  
Keyword(3) power spectrum  
Keyword(4) phase spectrum  
Keyword(5) range spectrum  
Keyword(6) 0m  
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Keyword(8)  
1st Author's Name Noboru Nakasako  
1st Author's Affiliation Kinki University (Kinki Univ.)
2nd Author's Name Keiji Kawanishi  
2nd Author's Affiliation Kinki University (Kinki Univ.)
3rd Author's Name Toshihiro Shinohara  
3rd Author's Affiliation Kinki University (Kinki Univ.)
4th Author's Name Tetsuji Uebo  
4th Author's Affiliation Kinki University (Kinki Univ.)
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Speaker Author-1 
Date Time 2011-11-19 10:30:00 
Presentation Time 30 minutes 
Registration for EA 
Paper # EA2011-92 
Volume (vol) vol.111 
Number (no) no.306 
Page pp.61-66 
#Pages
Date of Issue 2011-11-11 (EA) 


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