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| Presentation | 2013-01-24 13:10 A study on reproduced area control based on separating emission of carrier and subband waves Masato Nakayama, Tadashi Matsui, Takanobu Nishiura (Ritsumeikan Univ.)  US2012-92 EA2012-123 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | The parametric loudspeaker is ideal candidate to achieve audio system with the super high directivity by using ultrasound. An emitted intense amplitude modulated wave from the parametric loudspeaker is demodulated into the original audible sound in the air. In the frequency domain, the amplitude modulated wave is represented as the composite wave of carrier and sideband waves. This suggests that we can control the demodulation area by separating carrier and sideband waves by using multiple loudspeakers. Therefore, we propose the new reproduced area control method based on separating emission of carrier and sideband waves. In this paper, we also attempt to reduce a harmonic distortion from sideband wave by separating emission of sideband waves. Finally, we confirmed the effectiveness of the proposed method through evaluation experiments in real environments. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Parametric loudspeaker / Amplitude-modulated wave / Carrier wave / Sideband wave / Control of reproduction area / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 112, no. 388, EA2012-123, pp. 25-30, Jan. 2013. | |
| Paper # | EA2012-123 | |
| Date of Issue | 2013-01-17 (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 | US2012-92 EA2012-123 |
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| Conference Information | |
| Committee | US EA |
| Conference Date | 2013-01-24 - 2013-01-25 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Kambaikan, Doshisha Univ. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | [Joint Meeting on Acoustics and Ultrasonics Subsociety] Engineering/Electro Acoustics, Ultrasonic and Underwater Acoustics，and Related Topics |
| Paper Information | |
| Registration To | EA |
| Conference Code | 2013-01-US-EA |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A study on reproduced area control based on separating emission of carrier and subband waves |
| Sub Title (in English) | |
| Keyword(1) | Parametric loudspeaker |
| Keyword(2) | Amplitude-modulated wave |
| Keyword(3) | Carrier wave |
| Keyword(4) | Sideband wave |
| Keyword(5) | Control of reproduction area |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Masato Nakayama |
| 1st Author's Affiliation | Ritsumeikan University (Ritsumeikan Univ.) |
| 2nd Author's Name | Tadashi Matsui |
| 2nd Author's Affiliation | Ritsumeikan University (Ritsumeikan Univ.) |
| 3rd Author's Name | Takanobu Nishiura |
| 3rd Author's Affiliation | Ritsumeikan University (Ritsumeikan Univ.) |
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| Speaker | Author-1 |
| Date Time | 2013-01-24 13:10:00 |
| Presentation Time | 20 minutes |
| Registration for | EA |
| Paper # | US2012-92, EA2012-123 |
| Volume (vol) | vol.112 |
| Number (no) | no.387(US), no.388(EA) |
| Page | pp.25-30 |
| #Pages | 6 |
| Date of Issue | 2013-01-17 (US, EA) |
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