| Presentation | 2016-01-29 Investigation of electroacoustic transformation device -Thermophone- for radiating broadband ultrasound Takuya Nishioka, Shinji Takayanagi, Olivier Burbuiere, Mami Matsukawa, Takaaki Asada, Shizuko Hiryu, |
|---|---|
| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | We investigated the fundamental characteristics of the electric-sound transduction device -thermophone-. A thermophone generates sound via time-varying Joule heating of an electrically conductive layer, which leads to expansion and contraction of a small pocket of air near the surface of the metallic thin film. The results show that the frequency characteristics are flat up to 190 kHz and the directivity patterns are in good agreement with theoretical predictions, assuming a rectangular diaphragm with the same size as the metal film. In addition, we successfully reached high conversion efficiency(acoustic energy / input power) approximately 150 times greater than the one we used at the same power consumption (0.6W) by changing materials and thicknesses of those layers. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Aerial ultrasound / Three layered structure / Conversion efficiency / Bio SONAR |
| Paper # | US2015-102,EA2015-65 |
| Date of Issue | 2016-01-21 (US, EA) |
| Conference Information | |
| Committee | US / EA |
|---|---|
| Conference Date | 2016/1/28(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Kansai University, Centenary Memorial Hall |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | [Joint Meeting on Acoustics and Ultrasonics Subsociety] Engineering/Electro Acoustics, Ultrasonic and Underwater Acoustics, and Related Topics |
| Chair | Youichi Ito(Nihon Univ.) / Yoichi Haneda(Univ. of Electro-Comm.) |
| Vice Chair | Mami Matsukawa(Doshisha Univ.) / Nobuyuki Endoh(Kanagawa Univ.) / Yukio Iwaya(Tohoku Gakuin Univ.) / Mitsunori Mizumachi(Kyushu Inst. of Tech.) |
| Secretary | Mami Matsukawa(Univ. of Electro-Comm.) / Nobuyuki Endoh(Univ. of Electro-Comm.) / Yukio Iwaya(NTT) / Mitsunori Mizumachi(KDDI R&D Labs.) |
| Assistant | Hideyuki Hasegawa(Univ. of Toyama) / Shoichi Koyama(Univ. of Tokyo) |
| Paper Information | |
| Registration To | Technical Committee on Ultrasonics / Technical Committee on Engineering Acoustics |
|---|---|
| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Investigation of electroacoustic transformation device -Thermophone- for radiating broadband ultrasound |
| Sub Title (in English) | |
| Keyword(1) | Aerial ultrasound |
| Keyword(2) | Three layered structure |
| Keyword(3) | Conversion efficiency |
| Keyword(4) | Bio SONAR |
| 1st Author's Name | Takuya Nishioka |
| 1st Author's Affiliation | Doshisha University(Doshisha Univ.) |
| 2nd Author's Name | Shinji Takayanagi |
| 2nd Author's Affiliation | Doshisha University(Doshisha Univ.) |
| 3rd Author's Name | Olivier Burbuiere |
| 3rd Author's Affiliation | Doshisha University(Doshisha Univ.) |
| 4th Author's Name | Mami Matsukawa |
| 4th Author's Affiliation | Doshisha University(Doshisha Univ.) |
| 5th Author's Name | Takaaki Asada |
| 5th Author's Affiliation | Murata Manufacturing Co., Ltd.(Murata Manufacturing Co., Ltd.) |
| 6th Author's Name | Shizuko Hiryu |
| 6th Author's Affiliation | Doshisha University(Doshisha Univ.) |
| Date | 2016-01-29 |
| Paper # | US2015-102,EA2015-65 |
| Volume (vol) | vol.115 |
| Number (no) | US-423,EA-424 |
| Page | pp.pp.105-110(US), pp.63-68(EA), |
| #Pages | 6 |
| Date of Issue | 2016-01-21 (US, EA) |