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| Presentation | 2010-01-25 15:00 Out-of-phase excitation for parametric loudspeaker -- Effect of arrangment of ultrasonic projectors on parametric fields -- Akira Kikuchi, Yoshu Maekawa, Yoshiyuki Hara, Tomoo Kamakura, Hideyuki Nomura, Shinichi Sakai (Univ. of Electro-Comm.)  US2009-95 EA2009-103 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | A parametric loudspeaker is practically promising because its directivity is much sharper than that of a conventional loudspeaker. However, ultrasonic exposure due to intense carrier waves still remains, and is successfully solved for developing further the parametric loudspeaker. Ultrasonic emitters consist of several projectors that are driven individually at the same frequencies but different phase angles. Especially, two extreme cases of the usual in-phase driving and out-of-phase driving are focused on. Some experimental results show that carrier ultrasound pressures are decreased by 20~dB or more without deteriorating the features of parametric audio sounds. |
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| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Parametric loudspeaker / Out-of-phase driving / Harmonic distortion / Intermodulation distortion / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 109, no. 388, US2009-95, pp. 43-46, Jan. 2010. | |
| Paper # | US2009-95 | |
| Date of Issue | 2010-01-18 (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 | US2009-95 EA2009-103 |
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| Conference Information | |
| Committee | EA US |
| Conference Date | 2010-01-25 - 2010-01-26 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Paper Information | |
| Registration To | US |
| Conference Code | 2010-01-EA-US |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Out-of-phase excitation for parametric loudspeaker |
| Sub Title (in English) | Effect of arrangment of ultrasonic projectors on parametric fields |
| Keyword(1) | Parametric loudspeaker |
| Keyword(2) | Out-of-phase driving |
| Keyword(3) | Harmonic distortion |
| Keyword(4) | Intermodulation distortion |
| Keyword(5) | |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Akira Kikuchi |
| 1st Author's Affiliation | The University of Electro Communications (Univ. of Electro-Comm.) |
| 2nd Author's Name | Yoshu Maekawa |
| 2nd Author's Affiliation | The University of Electro Communications (Univ. of Electro-Comm.) |
| 3rd Author's Name | Yoshiyuki Hara |
| 3rd Author's Affiliation | The University of Electro Communications (Univ. of Electro-Comm.) |
| 4th Author's Name | Tomoo Kamakura |
| 4th Author's Affiliation | The University of Electro Communications (Univ. of Electro-Comm.) |
| 5th Author's Name | Hideyuki Nomura |
| 5th Author's Affiliation | The University of Electro Communications (Univ. of Electro-Comm.) |
| 6th Author's Name | Shinichi Sakai |
| 6th Author's Affiliation | The University of Electro Communications (Univ. of Electro-Comm.) |
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| Speaker | Author-1 |
| Date Time | 2010-01-25 15:00:00 |
| Presentation Time | 25 minutes |
| Registration for | US |
| Paper # | US2009-95, EA2009-103 |
| Volume (vol) | vol.109 |
| Number (no) | no.388(US), no.389(EA) |
| Page | pp.43-46(US), pp.25-28(EA) |
| #Pages | 4 |
| Date of Issue | 2010-01-18 (US, EA) |
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