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| Presentation | 2012-11-29 16:40 Compressed parametric ultrasound with chirp signal Hideyuki Nomura, Hideo Adachi, Tomoo Kamakura (UEC), Gregory T. Clement (HMS)  US2012-79 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | The directivity of parametric difference frequency sound is narrower than that of linear sound with same frequency radiated from a sound source with same aperture size. In addition, the difference frequency sound can propagate for long distance, because the energy dissipation of sound in a medium at low frequency is less than those of usual ultrasounds for measurements and medical imaging. However, for applications of difference frequency sound on measurements and imaging, that has the disadvantage of low spatial resolution because of low frequency. In this report, we proposed the application of pulse compression technique to difference frequency sound to solve the problem of low spatial resolution. The realization of compressed parametric difference frequency sound, especially relationship between compressed pulse width and sweep frequency width and window function (envelope function) of chirp signal, were investigated using computer simulations. The results indicated the realization of pulse compressed parametric difference frequency sound with properties comparable to that of linear sound compression using a suitable window function. |
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| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Nonlinear sound propagation / Parametric difference frequency sound / Chirp signal / Pulse compression / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 112, no. 326, US2012-79, pp. 51-56, Nov. 2012. | |
| Paper # | US2012-79 | |
| Date of Issue | 2012-11-22 (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 | US2012-79 |
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| Conference Information | |
| Committee | US |
| Conference Date | 2012-11-29 - 2012-11-29 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Shizuoka Univ. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Nonlinear Acoustics, General |
| Paper Information | |
| Registration To | US |
| Conference Code | 2012-11-US |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Compressed parametric ultrasound with chirp signal |
| Sub Title (in English) | |
| Keyword(1) | Nonlinear sound propagation |
| Keyword(2) | Parametric difference frequency sound |
| Keyword(3) | Chirp signal |
| Keyword(4) | Pulse compression |
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| 1st Author's Name | Hideyuki Nomura |
| 1st Author's Affiliation | The University of Electro-Communications (UEC) |
| 2nd Author's Name | Hideo Adachi |
| 2nd Author's Affiliation | The University of Electro-Communications (UEC) |
| 3rd Author's Name | Tomoo Kamakura |
| 3rd Author's Affiliation | The University of Electro-Communications (UEC) |
| 4th Author's Name | Gregory T. Clement |
| 4th Author's Affiliation | Harvard Medical School (HMS) |
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| Speaker | Author-1 |
| Date Time | 2012-11-29 16:40:00 |
| Presentation Time | 25 minutes |
| Registration for | US |
| Paper # | US2012-79 |
| Volume (vol) | vol.112 |
| Number (no) | no.326 |
| Page | pp.51-56 |
| #Pages | 6 |
| Date of Issue | 2012-11-22 (US) |
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