| 锥形声源的二次谐波声场分布 |
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| 引用本文： | 丁德胜, 刘晓峻. 锥形声源的二次谐波声场分布[J]. 声学学报, 1997, 22(3): 268-273. DOI: 10.15949/j.cnki.0371-0025.1997.03.010 |
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| 作者姓名： | 丁德胜 刘晓峻 |
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| 作者单位： | 东南大学生物科学与医学工程系，南京大学声学研究所 |
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| 基金项目： | 东南大学青年教师基金,南京大学近代声学国家重点实验室开放课题 |
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| 摘 要： | 本文推导了锥形声源的非线性二次谐波声场分布。理论表明锥形源二次谐波声场沿径向呈Bessel函数分布,且与传播距离无关。另一个重要结论是这种声场的二次谐波束宽刚好为基波的1/2,而非一般情况下的$1 / sqrt{2}$倍,此外,我们指出了这种声束在非线性参量B/A成象或测量中潜在的应用价值.
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| 收稿时间： | 1995-10-09 |
| 修稿时间： | 1996-08-24 |
The second harmonic generation of a conical sound source |
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| DING Desheng, LIU Xiaojun. The second harmonic generation of a conical sound source[J]. ACTA ACUSTICA, 1997, 22(3): 268-273. DOI: 10.15949/j.cnki.0371-0025.1997.03.010 |
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| Authors: | DING Desheng LIU Xiaojun |
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| Abstract: | The second harmonic sound beam distribution nonlinearly generated by a conical source has beed derived. Theoretical results indicate that the second harmonic beam is distributed as a Bessel function along the radial direction, and independent of the propagation distance. Another important feature is that the beamwidth of the second harmonic component is just equal to 1/2 times as that of the fundamental, not as $1/sqrt{2}$ times in the general cases. A potential application of this sound beam in the acoustic nonlinear parameter B/A imaging or measurement is also discussed. |
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