| Presentation | 2022-05-19 Parametric sound generated by self-bending airborne ultrasound beam Hideyuki Nomura, Nagisa Yamamoto, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Self-bending of ultrasonic beams can be achieved by appropriately modulating the sound pressure distribution at the emitter surface. This study theoretically and experimentally investigated the effect of a self-bending airborne ultrasound beam based on the Airy function on the generation of secondary waves, especially parametric sound at the difference frequency. First, the effect of spatial modulation of the primary signal on the secondary wave generation is studied experimentally. Then, the sound pressure on the emitter was actually spatially modulated, and the realization of the bending beam of the primary wave and the characteristics of the difference frequency beam were experimentally investigated. The result indicated that the demodulated sound at difference frequency also showed an asymmetric distribution, corresponding to the spatial distribution of the self-bending primary ultrasound beam. However, the bending properties of demodulated sound were not realized as well as that of the primary sound. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Airy function / Nonlinear propagation / Spatial modulation of sound source / Demodulation |
| Paper # | US2022-3 |
| Date of Issue | 2022-05-12 (US) |
| Conference Information | |
| Committee | US |
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| Conference Date | 2022/5/19(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Kikai-Shinko-Kaikan Bldg. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Nonlinear acoustics, Ultrasonics, etc. |
| Chair | Yoshikazu Koike(Shibaura Inst. of Tech.) |
| Vice Chair | Hikaru Miura(Nihon Univ.) / Kentaro Nakamura(Tokyo Inst. of Tech.) |
| Secretary | Hikaru Miura(Tohoku Univ.) / Kentaro Nakamura(Chiba Univ.) |
| Assistant | Shin Yoshizawa(Tohoku Univ.) |
| Paper Information | |
| Registration To | Technical Committee on Ultrasonics |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Parametric sound generated by self-bending airborne ultrasound beam |
| Sub Title (in English) | |
| Keyword(1) | Airy function |
| Keyword(2) | Nonlinear propagation |
| Keyword(3) | Spatial modulation of sound source |
| Keyword(4) | Demodulation |
| 1st Author's Name | Hideyuki Nomura |
| 1st Author's Affiliation | The University of Electro-Communications(UEC) |
| 2nd Author's Name | Nagisa Yamamoto |
| 2nd Author's Affiliation | The University of Electro-Communications(UEC) |
| Date | 2022-05-19 |
| Paper # | US2022-3 |
| Volume (vol) | vol.122 |
| Number (no) | US-36 |
| Page | pp.pp.8-11(US), |
| #Pages | 4 |
| Date of Issue | 2022-05-12 (US) |