| Presentation | 2004/12/9 Convergence of Sound Waves Radiated from the Aerial Ultrasonic Source using a Square Transverse Vibrating Plate with Several Reflective Boards Yuu ONISHI, Hikaru MIURA, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | A square plate actuated by an ultrasonic source emits extremely intense ultrasonic waves into the air from its flat surface. The plate also exhibits transverse vibration when vibrated longitudinally. The nodal positions of the plate take the form of straight lines, creating a lattice-like pattern. The source thus radiates four directional sound waves in the far field. Studies on converging sound waves into a plane have been carried out but have so far failed to obtain effective convergence. We propose the configuration of a convergence using a source plus several reflective boards placed near it. The aim is to focus high sound pressure at one point. We investigated various setups designed to focus sound waves. We installed two square reflective flat boards in parallel to the vibrating plate on either side of it, then added a third reflective board for changing the direction of sound waves, and employed a curved reflective board to focus the sound waves. Sound pressure and phase were measured in each case. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Aerial Ultrasonic Source / Transverse Vibrating Plate / Lattice-Mode / Convergence of Sound Waves / Reflective Boards |
| Paper # | US2004-75 |
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| Conference Information | |
| Committee | US |
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| Conference Date | 2004/12/9(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) | Convergence of Sound Waves Radiated from the Aerial Ultrasonic Source using a Square Transverse Vibrating Plate with Several Reflective Boards |
| Sub Title (in English) | |
| Keyword(1) | Aerial Ultrasonic Source |
| Keyword(2) | Transverse Vibrating Plate |
| Keyword(3) | Lattice-Mode |
| Keyword(4) | Convergence of Sound Waves |
| Keyword(5) | Reflective Boards |
| 1st Author's Name | Yuu ONISHI |
| 1st Author's Affiliation | Department of Electrical Engineering, College of Science and Technology, Nihon University() |
| 2nd Author's Name | Hikaru MIURA |
| 2nd Author's Affiliation | Department of Electrical Engineering, College of Science and Technology, Nihon University |
| Date | 2004/12/9 |
| Paper # | US2004-75 |
| Volume (vol) | vol.104 |
| Number (no) | 508 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |