| Presentation | 2019-06-17 Signal Coding Method for Acoustic Sensing in Occlusion Area Using Super-directional Sound Source Seiji Kouyama, Kan Okubo, Norio Tagawa, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Acoustic sensing is sensing in air using sound waves. As sensing technology, various kinds of signals suchas light, radio waves, sound waves, and lasers are used. Sound waves have a longer wavelength than light and radiowaves, and physical phenomena called diffraction are likely to occur. In this research, we focused on the phenomenonof diffraction by sound waves, and tried to detect objects in invisible regions that can not be detected by visiblelight. In the experiment, by using a parametric speaker that can reproduce low-frequency sound waves with sharpdirectivity, it is possible to prevent SNR reduction and multi-path fading etc., generate diffraction phenomena bysound waves, and detect objects in the invisible region . Then, the optimal coding signal for object detection in theinvisible area in airborne sound is sought, and the signal coding method is compared and evaluated. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | acoustic imaging / acoustic sensing / parametric-speaker / M-sequence modulation signal / Diffraction phenomenon |
| Paper # | US2019-22 |
| Date of Issue | 2019-06-10 (US) |
| Conference Information | |
| Committee | US |
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| Conference Date | 2019/6/17(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Akihabara satellite campus, Tokyo Metropolitan University |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | Jun Kondo(Shizuoka Univ.) |
| Vice Chair | Shinichi Takeuchi(Toin Univ. of Yokohama) / Hikaru Miura(Nihon Univ.) |
| Secretary | Shinichi Takeuchi(Kanagawa Univ.) / Hikaru Miura(Doshisha Univ.) |
| Assistant | Mototaka Arakawa(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) | Signal Coding Method for Acoustic Sensing in Occlusion Area Using Super-directional Sound Source |
| Sub Title (in English) | |
| Keyword(1) | acoustic imaging |
| Keyword(2) | acoustic sensing |
| Keyword(3) | parametric-speaker |
| Keyword(4) | M-sequence modulation signal |
| Keyword(5) | Diffraction phenomenon |
| 1st Author's Name | Seiji Kouyama |
| 1st Author's Affiliation | Tokyo Metropolitan University(TMU) |
| 2nd Author's Name | Kan Okubo |
| 2nd Author's Affiliation | Tokyo Metropolitan University(TMU) |
| 3rd Author's Name | Norio Tagawa |
| 3rd Author's Affiliation | Tokyo Metropolitan University(TMU) |
| Date | 2019-06-17 |
| Paper # | US2019-22 |
| Volume (vol) | vol.119 |
| Number (no) | US-87 |
| Page | pp.pp.15-19(US), |
| #Pages | 5 |
| Date of Issue | 2019-06-10 (US) |