| Presentation | 2009-01-29 Phase inversion driving for parametric loudspeaker : Reduction of ultrasonic sound pressure and application for head model Masayoshi KONDO, Daisuke FUKAGAWA, Hideyuki NOMURA, Tomoo KAMAKURA, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Two planar projectors with identical rectangular apertures are placed side by side. Both the projectors radiate intense bifrequency-ultrasound beams in air. Two extreme cases are focused: one is conventional in-phase driving, and the other is phase-inversion driving. Sound pressure profiles were measured on a rigid sphere and a dummy head that imitate a human head. It was experimentally confirmed that the ultrasonic pressure levels are generally reduced by more than 10dB using the phase inversion technique. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Parametric loudspeaker / Phase inversion / Ultrasonic exposure / Dummy head |
| Paper # | US2008-78,EA2008-120 |
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| Conference Information | |
| Committee | EA |
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| Conference Date | 2009/1/22(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
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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) | Phase inversion driving for parametric loudspeaker : Reduction of ultrasonic sound pressure and application for head model |
| Sub Title (in English) | |
| Keyword(1) | Parametric loudspeaker |
| Keyword(2) | Phase inversion |
| Keyword(3) | Ultrasonic exposure |
| Keyword(4) | Dummy head |
| 1st Author's Name | Masayoshi KONDO |
| 1st Author's Affiliation | The University of Electro-Communications() |
| 2nd Author's Name | Daisuke FUKAGAWA |
| 2nd Author's Affiliation | The University of Electro-Communications |
| 3rd Author's Name | Hideyuki NOMURA |
| 3rd Author's Affiliation | The University of Electro-Communications |
| 4th Author's Name | Tomoo KAMAKURA |
| 4th Author's Affiliation | The University of Electro-Communications |
| Date | 2009-01-29 |
| Paper # | US2008-78,EA2008-120 |
| Volume (vol) | vol.108 |
| Number (no) | 411 |
| Page | pp.pp.- |
| #Pages | 4 |
| Date of Issue | |