| Presentation | 2001/1/19 Concave reception of the second harmonic beam transmitting through a slit of transparent plate Shigemi Saito, |
|---|---|
| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | The fundamental and second harmonic signals beyond the 1.0-mm thick polystyrene plate with a slit of 0.1-mm or 0.2-mm width inserted at the focal plane of a focused Gaussian beam of 1.9-MHz frequency and 85-mm focal length, which are detected with a concave receiver set confocal with the source, are investigated. In the theory based on a model that the sound transmitting through the slit uniformly delays across the slit in its phase compared to the sound passing through the solid plate, the calculation is simplified by using analytical solution for the spatial distribution of the concave receiver sensitivity and by integrating the virtual source induced by the nonlinear propagation weighted with the receiving sensitivity distribution. Furthermore the amount of phase delay is experimentally estimated. The calculated result well explains the experimental observation that only the second harmonic amplitude is significantly decreased by the insertion of the slit into the beam, and shows that this phenomenon is primarily due to the difference in frequency. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | focused ultrasound / nonlinear distortion / second harmonic / slit / acoustic microscope |
| Paper # | US2000-100,EA2000-107 |
| Date of Issue |
| Conference Information | |
| Committee | EA |
|---|---|
| Conference Date | 2001/1/19(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | |
| Vice Chair | |
| Secretary | |
| Assistant | |
| Paper Information | |
| Registration To | Engineering Acoustics (EA) |
|---|---|
| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Concave reception of the second harmonic beam transmitting through a slit of transparent plate |
| Sub Title (in English) | |
| Keyword(1) | focused ultrasound |
| Keyword(2) | nonlinear distortion |
| Keyword(3) | second harmonic |
| Keyword(4) | slit |
| Keyword(5) | acoustic microscope |
| 1st Author's Name | Shigemi Saito |
| 1st Author's Affiliation | Faculty of Marine Science and Technology, Tokai University() |
| Date | 2001/1/19 |
| Paper # | US2000-100,EA2000-107 |
| Volume (vol) | vol.100 |
| Number (no) | 581 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |