| Presentation | 1993/4/23 A precise estimation of the acoustic holography of a sound source radiating a periodic sound Satoshi Hongo, Masato Abe, Yoshiaki Nemoto, Noriyoshi Chuubachi, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | A method using a sub-array and a reference sensor has been used widely to measure the acoustic holography to reduce the cost of instruments.However,the phase distribution can not be measured by the method,and the effect of the other sound sources and reflections on the reference sensor can not be removed so much compared to the full array system.Therefore,we propose a new method to estimate more precisely the acoustic holography in case that the sounds can be assumed to be periodic such as the sound due to a motor cycle.By ordinary beamforming technique using a sub- array,the position of a sound source is estimated in advance and all of the outputs of the sub-array are averaged after compensating the propagation delay from the sound source to each sensor.This procedure is repeated several times by moving the sub- array,and the correlation function is calculated between the averaged outputs in the different positions of the sub-array.The time,where the correlation function shows a peak,is the time lag by which all of the outputs of sub-array in the different position should be shifted.All of the shifted outputs are analyzed by the conventional acoustic holography technique using a full-array.It is found by some computer simulations and experiments that the effect of other sound sources and reflections reduced by using a sub-array as well as by the full-array. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Acoustic Holography / referance sensor / cross-spectrum / sound source estimation / sensor array / sub-array |
| Paper # | EA93-5 |
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| Conference Information | |
| Committee | EA |
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| Conference Date | 1993/4/23(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) | A precise estimation of the acoustic holography of a sound source radiating a periodic sound |
| Sub Title (in English) | |
| Keyword(1) | Acoustic Holography |
| Keyword(2) | referance sensor |
| Keyword(3) | cross-spectrum |
| Keyword(4) | sound source estimation |
| Keyword(5) | sensor array |
| Keyword(6) | sub-array |
| 1st Author's Name | Satoshi Hongo |
| 1st Author's Affiliation | Faculty of Engineering,Tohoku University() |
| 2nd Author's Name | Masato Abe |
| 2nd Author's Affiliation | Computer Center.Tohoku University |
| 3rd Author's Name | Yoshiaki Nemoto |
| 3rd Author's Affiliation | Computer Center.Tohoku University |
| 4th Author's Name | Noriyoshi Chuubachi |
| 4th Author's Affiliation | Faculty of Enineering,Tohoku University |
| Date | 1993/4/23 |
| Paper # | EA93-5 |
| Volume (vol) | vol.93 |
| Number (no) | 9 |
| Page | pp.pp.- |
| #Pages | 8 |
| Date of Issue | |