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| Presentation | 2008-01-29 13:30 Studies on Parametric Loudspeaker System Using Dynamic Single-Sideband Modulator Hidetoshi Aiko, Kenta Nomura, Kenichi Aoki, Tomoo Kamakura, Shinichi Sakai (Electro-Communications Univ.), Vincent Joly (Maine Univ.)  US2007-102 EA2007-107 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | A parametric loudspeaker using the self-demodulation effect of a finite-amplitude ultrasound that is amplitude- modulated by audio signals is promisingly applicable to a highly directive audio system. This loudspeaker has been technically developed and advanced for practical use so far. However, several problems remain still unclear. Especially, the improvements of insufficient sound quality and low conversion efficiency from electric to sound power are need primarily for further applications of the parametric loudspeaker. To overcome the former problem, we propose the dynamic carrier modulation that is based on the Weaver single side-band method. Using a prototyped Weaver modulator, we discuss theoretically and experimentally the field characteristics of secondary waves such as the difference frequency tone from the perspective of signal distortion and linearity. |
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| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Parametric loudspeaker / Digital modulator / Envelope / Weaver method / DSB / SSB / / | |
| Reference Info. | IEICE Tech. Rep., vol. 107, no. 468, US2007-102, pp. 33-38, Jan. 2008. | |
| Paper # | US2007-102 | |
| Date of Issue | 2008-01-22 (US, 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 | US2007-102 EA2007-107 |
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| Conference Information | |
| Committee | EA US |
| Conference Date | 2008-01-28 - 2008-01-29 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Kansai University |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | General |
| Paper Information | |
| Registration To | US |
| Conference Code | 2008-01-EA-US |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Studies on Parametric Loudspeaker System Using Dynamic Single-Sideband Modulator |
| Sub Title (in English) | |
| Keyword(1) | Parametric loudspeaker |
| Keyword(2) | Digital modulator |
| Keyword(3) | Envelope |
| Keyword(4) | Weaver method |
| Keyword(5) | DSB |
| Keyword(6) | SSB |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Hidetoshi Aiko |
| 1st Author's Affiliation | The University of Electro-Communications (Electro-Communications Univ.) |
| 2nd Author's Name | Kenta Nomura |
| 2nd Author's Affiliation | The University of Electro-Communications (Electro-Communications Univ.) |
| 3rd Author's Name | Kenichi Aoki |
| 3rd Author's Affiliation | The University of Electro-Communications (Electro-Communications Univ.) |
| 4th Author's Name | Tomoo Kamakura |
| 4th Author's Affiliation | The University of Electro-Communications (Electro-Communications Univ.) |
| 5th Author's Name | Shinichi Sakai |
| 5th Author's Affiliation | The University of Electro-Communications (Electro-Communications Univ.) |
| 6th Author's Name | Vincent Joly |
| 6th Author's Affiliation | University of Maine (Maine Univ.) |
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| Speaker | Author-1 |
| Date Time | 2008-01-29 13:30:00 |
| Presentation Time | 30 minutes |
| Registration for | US |
| Paper # | US2007-102, EA2007-107 |
| Volume (vol) | vol.107 |
| Number (no) | no.468(US), no.470(EA) |
| Page | pp.33-38(US), pp.35-40(EA) |
| #Pages | 6 |
| Date of Issue | 2008-01-22 (US, EA) |
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