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| Presentation | 2009-01-30 11:25 Automatic Measurement of Acoustic Nonlinearity Parameter for Small-Volume Liquid Samples Shigemi Saito (Tokai Univ.), Jung-Ho Kim (GW Corp.), Shohei Yokota, Shota Enomoto (Tokai Univ.)  US2008-84 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | On the basis of finite-amplitude and comparative methods, the acoustic nonlinearity parameter B/A of a liquid sample with a volume as small as 0.1 ml is automatically measured using an 18.6 MHz focused Gaussian beam. The sample fills the space between an acoustic window of polystyrene plate and a tungsten reflector set about 1 mm apart from each other within the focal region. The sound speed c is determined by the time of flight in the sample. Then the density rho is estimated from the reflection coefficient at the interface between the polystyrene plate and the sample. When the dual frequency wave of fundamental and its double frequencies is emanated, the attenuation coefficients alfa1 and alfa2 are derived from the amplitudes at those frequencies. The difference in the second harmonic wavenumber compared to the case without dispersion, Dk, is obtained from the relative phase difference of two frequency components. Summarizing all linear properties and amplitude data of the second harmonic component in the sound transmitted through the sample, the B/A value is finally determined. Since all the process including the setting of the reflector surface on the focal plane is sequentially conducted with LabVIEW automating program, burdensome operations of instruments are not required for the measurement. A series of measurement is completed in only 6 seconds after setting the sample. The present method is validated through the experiments for liquid samples. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Nonlinearity Parameter / Finite Amplitude Method / Focused Sound / Automatic Measurement / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 108, no. 410, US2008-84, pp. 69-74, Jan. 2009. | |
| Paper # | US2008-84 | |
| Date of Issue | 2009-01-22 (US) | |
| ISSN | Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 | |
| Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) | |
| Download PDF | US2008-84 |
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| Conference Information | |
| Committee | EA US |
| Conference Date | 2009-01-29 - 2009-01-30 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Paper Information | |
| Registration To | US |
| Conference Code | 2009-01-EA-US |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Automatic Measurement of Acoustic Nonlinearity Parameter for Small-Volume Liquid Samples |
| Sub Title (in English) | |
| Keyword(1) | Nonlinearity Parameter |
| Keyword(2) | Finite Amplitude Method |
| Keyword(3) | Focused Sound |
| Keyword(4) | Automatic Measurement |
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| 1st Author's Name | Shigemi Saito |
| 1st Author's Affiliation | Tokai University (Tokai Univ.) |
| 2nd Author's Name | Jung-Ho Kim |
| 2nd Author's Affiliation | GW Corporation (GW Corp.) |
| 3rd Author's Name | Shohei Yokota |
| 3rd Author's Affiliation | Tokai University (Tokai Univ.) |
| 4th Author's Name | Shota Enomoto |
| 4th Author's Affiliation | Tokai University (Tokai Univ.) |
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| Speaker | Author-1 |
| Date Time | 2009-01-30 11:25:00 |
| Presentation Time | 25 minutes |
| Registration for | US |
| Paper # | US2008-84 |
| Volume (vol) | vol.108 |
| Number (no) | no.410 |
| Page | pp.69-74 |
| #Pages | 6 |
| Date of Issue | 2009-01-22 (US) |
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