| Presentation | 2005/5/6 Improvement of the conversion efficiency for a parametric sound system Yoshihiro HAMAMOTO, Tomoo KAMAKURA, Kenichi AOKI, Shinichi SAKAI, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | A parametric speaker whose directivity is much sharper than that of a conventional dynamic speaker still leaves room to improve the conversion efficiency from electric power to acoustic power. By connecting an appropriate coil in parallel with the input terminals of an ultrasonic emitter, one may expect to reduce reactive current in the emitter, improving the power efficiency reasonably. For speech and music programs, the average electric power in working the speaker was actually reduced by about 30% by connecting the coil. Moreover, the prospective modulation method of SSB with an envelope carrier is discussed to reduce distortion in parametric sounds. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | parametric speaker / effective power / single-side band / envelope |
| Paper # | US2005-11 |
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| Conference Information | |
| Committee | US |
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| Conference Date | 2005/5/6(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) | Improvement of the conversion efficiency for a parametric sound system |
| Sub Title (in English) | |
| Keyword(1) | parametric speaker |
| Keyword(2) | effective power |
| Keyword(3) | single-side band |
| Keyword(4) | envelope |
| 1st Author's Name | Yoshihiro HAMAMOTO |
| 1st Author's Affiliation | The University of Electro-Communications() |
| 2nd Author's Name | Tomoo KAMAKURA |
| 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 | Shinichi SAKAI |
| 4th Author's Affiliation | Mitsubishi Electric Engineering Co., Ltd. |
| Date | 2005/5/6 |
| Paper # | US2005-11 |
| Volume (vol) | vol.105 |
| Number (no) | 44 |
| Page | pp.pp.- |
| #Pages | 4 |
| Date of Issue | |