| Presentation | 2013-01-24 A study on reproduced area control based on separating emission of Carrier and sideband waves Masato NAKAYAMA, Tadashi MATSUI, Takanobu NISHIURA, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(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) |
| Keyword(in English) | Parametric loudspeaker / Amplitude-modulated wave / Carrier wave / Sideband wave / Control of reproduction area |
| Paper # | US2012-92,EA2012-123 |
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| Conference Information | |
| Committee | US |
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| Conference Date | 2013/1/17(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Ultrasonics (US) |
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| Language | JPN |
| 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 sideband 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 |
| 1st Author's Name | Masato NAKAYAMA |
| 1st Author's Affiliation | College of Information Science and Engineering, Ritsumeikan University() |
| 2nd Author's Name | Tadashi MATSUI |
| 2nd Author's Affiliation | College of Information Science and Engineering, Ritsumeikan University |
| 3rd Author's Name | Takanobu NISHIURA |
| 3rd Author's Affiliation | College of Information Science and Engineering, Ritsumeikan University |
| Date | 2013-01-24 |
| Paper # | US2012-92,EA2012-123 |
| Volume (vol) | vol.112 |
| Number (no) | 387 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |