| Presentation | 2008-01-29 Studies on Parametric Loudspeaker System Using Dynamic Single-Sideband Modulator Hidetoshi AIKO, Kenta NOMURA, Kenichi AOKI, Tomoo KAMAKURA, Shinichi SAKAI, Vincent JOLY, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(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. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Parametric loudspeaker / Digital modulator / Envelope / Weaver method / DSB / SSB |
| Paper # | US2007-102,EA2007-107 |
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| Conference Information | |
| Committee | EA |
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| Conference Date | 2008/1/22(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Engineering Acoustics (EA) |
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| Language | JPN |
| 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 |
| 1st Author's Name | Hidetoshi AIKO |
| 1st Author's Affiliation | The University of Electro-Communications() |
| 2nd Author's Name | Kenta NOMURA |
| 2nd Author's Affiliation | The University of Electro-Communications |
| 3rd Author's Name | Kenichi AOKI |
| 3rd Author's Affiliation | The University of Electro-Communications |
| 4th Author's Name | Tomoo KAMAKURA |
| 4th Author's Affiliation | The University of Electro-Communications |
| 5th Author's Name | Shinichi SAKAI |
| 5th Author's Affiliation | The University of Electro-Communications |
| 6th Author's Name | Vincent JOLY |
| 6th Author's Affiliation | Universite du Maine |
| Date | 2008-01-29 |
| Paper # | US2007-102,EA2007-107 |
| Volume (vol) | vol.107 |
| Number (no) | 470 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |