| Presentation | 2003/9/15 Calculation of Reflection of Spherical Wave on Curved Surface : Investigation on a Microphone using Optical Reflection Yasushi SUZUKI, Ken'iti KIDO, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | This paper describes the sound pressure sensitivity of a microphone which uses the optical total reflection on the boundary curved surface between a glass and the air. We have investigated theoretically the sensitivity of the microphone employing an ideal plane-wave light source so far. In this paper, we investigate the sensitivity of the microphone employing a spherical-wave light source (point light source) because the light beams of real light source expand. The sensitivity depends on the expanse of the beams and the ratio of the distance between the reflection point on the surface and the light source to the curvature of the surface. It can be expected that the microphone employing a point light source has enough sensitivity for practical use if the expanse of the light beams is small and the ratio is chosen to an adequate value. The microphone has no mechanical vibration and its upper limit in the frequency range is high. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Microphone / Optical Reflection / Point Light Source / Curved Surface / Pressure Sensitivity |
| Paper # | EA2003-71 |
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| Conference Information | |
| Committee | EA |
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| Conference Date | 2003/9/15(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Engineering Acoustics (EA) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Calculation of Reflection of Spherical Wave on Curved Surface : Investigation on a Microphone using Optical Reflection |
| Sub Title (in English) | |
| Keyword(1) | Microphone |
| Keyword(2) | Optical Reflection |
| Keyword(3) | Point Light Source |
| Keyword(4) | Curved Surface |
| Keyword(5) | Pressure Sensitivity |
| 1st Author's Name | Yasushi SUZUKI |
| 1st Author's Affiliation | Department of Electronic Media Technology, Gunma National College of Technology() |
| 2nd Author's Name | Ken'iti KIDO |
| 2nd Author's Affiliation | Professor Emeritus, Tohoku University |
| Date | 2003/9/15 |
| Paper # | EA2003-71 |
| Volume (vol) | vol.103 |
| Number (no) | 321 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |