| Presentation | 2021-03-03 Transmission characteristics of low profile airborne ultrasonic transducer Kohei Shida, Yuji Wada, Kentaro Nakamura, |
|---|---|
| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Application area of airborne ultrasound has been extending from sensing to non-contact manipulation of small objects and haptic devices. In these applications, an array consist of several 10 element transducers is used. There is a strong demand for smaller-sized transducer in thickness. This study deals with a low profile configuration for airborne ultrasonic transducer composed only of a thin vibrating disk and an annular piezoelectric ceramic element, which provides a required sound pressure. The characteristics of the designed transducer was evaluated through prototyping. A trial transducer of 8 mm and 1.8 mm in diameter and thickness successfully produced a sound pressure level of 119 dB (=18 Pa) at the distance of 300 mm and the frequency of around 46 kHz. The full width half maximum of the radiation directivity was approximately 90 degrees. The mechanical Q-value was 86 under high vibration amplitude. The structure, working principle, design based on finite element analysis, and characteristics for different disk materials are described in this report. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Airborne Ultrasound / Piezoelectric Transducer / Low Profile / Sound Pressure / Directivity |
| Paper # | US2020-77 |
| Date of Issue | 2021-02-24 (US) |
| Conference Information | |
| Committee | EA / US / SP / SIP / IPSJ-SLP |
|---|---|
| Conference Date | 2021/3/3(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Speech, Engineering/Electro Acoustics, Signal Processing, Ultrasonics, and Related Topics |
| Chair | Kenichi Furuya(Oita Univ.) / Hikaru Miura(Nihon Univ.) / Hisashi Kawai(NICT) / Kazunori Hayashi(Kyoto Univ.) / 北岡 教英(豊橋技科大) |
| Vice Chair | Yoshinobu Kajikawa(Kansai Univ.) / Kentaro Matsui(NHK) / Jun Kondo(Shizuoka Univ.) / Yoshikazu Koike(Shibaura Inst. of Tech.) / / Yukihiro Bandou(NTT) / Toshihisa Tanaka(Tokyo Univ. Agri.&Tech.) |
| Secretary | Yoshinobu Kajikawa(Univ. of Tokyo) / Kentaro Matsui(NTT) / Jun Kondo(Doshisha Univ.) / Yoshikazu Koike(Tohoku Univ.) / (Univ. of Tokyo) / Yukihiro Bandou(Waseda Univ.) / Toshihisa Tanaka(Hosei Univ.) / (Waseda Univ.) |
| Assistant | Yukou Wakabayashi(Tokyo Metropolitan Univ.) / Tatsuya Komatsu(LINE) / Shinnosuke Hirata(Tokyo Inst. of Tech.) / Yusuke Ijima(NTT) / Yuichi Tanaka(Tokyo Univ. Agri.&Tech.) |
| Paper Information | |
| Registration To | Technical Committee on Engineering Acoustics / Technical Committee on Ultrasonics / Technical Committee on Speech / Technical Committee on Signal Processing / Special Interest Group on Spoken Language Processing |
|---|---|
| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Transmission characteristics of low profile airborne ultrasonic transducer |
| Sub Title (in English) | |
| Keyword(1) | Airborne Ultrasound |
| Keyword(2) | Piezoelectric Transducer |
| Keyword(3) | Low Profile |
| Keyword(4) | Sound Pressure |
| Keyword(5) | Directivity |
| 1st Author's Name | Kohei Shida |
| 1st Author's Affiliation | Tokyo Institute of Technology(Tokyo Tech) |
| 2nd Author's Name | Yuji Wada |
| 2nd Author's Affiliation | Tokyo Institute of Technology(Tokyo Tech) |
| 3rd Author's Name | Kentaro Nakamura |
| 3rd Author's Affiliation | Tokyo Institute of Technology(Tokyo Tech) |
| Date | 2021-03-03 |
| Paper # | US2020-77 |
| Volume (vol) | vol.120 |
| Number (no) | US-396 |
| Page | pp.pp.1-6(US), |
| #Pages | 6 |
| Date of Issue | 2021-02-24 (US) |