INVESTIGATION OF A HIGH-INTENSITY SOUND BEAM FROM A PLANE TRANSDUCER - EXPERIMENTAL AND THEORETICAL RESULTS
INVESTIGATION OF A HIGH-INTENSITY SOUND BEAM FROM A PLANE TRANSDUCER - EXPERIMENTAL AND THEORETICAL RESULTS
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DOI：
10.1121/1.413344
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发表时间：
1995-10-01
影响因子：
2.4
通讯作者：
TJOTTA, S
中科院分区：
文献类型：
--
作者：
NACHEF, S;CATHIGNOL, D;TJOTTA, S
本文对平面圆形换能器的高强度声束进行了系统的研究，给出了大范围激励水平的结果。激波形成距离与瑞利距离的比值在1.7~0.06之间。给出了实验装置的详细描述。讨论了高强度、高指向性声源校准时遇到的问题，提出了一种新的校准方法。连续波激励的情况下的实验结果，并与使用的卑尔根代码的模拟进行比较，从而允许断言模型（Khokhlov-Zabolotskaya-Kuznetsov方程）和数值算法（变换束方程的谱分解和有限差分法）的高强度声束的有用性。发现了一种新的效应，即光束的非线性散焦。(C)1995年美国声学学会。
Results of a systematic investigation of a high intensity sound beam from a plane circular transducer are presented for a large range of excitation levels. The ratio of the shock formation distance to the Rayleigh distance ranges from 1.7 to 0.06. A detailed description of the experimental setup is given. Problems encountered when calibrating highly intense and highly directive sound sources are discussed, and a novel method of calibration is proposed. Experimental results for the case of cw excitation are presented and compared with a simulation using the Bergen Code, thus allowing to assert the usefulness of the model (Khokhlov-Zabolotskaya-Kuznetsov equation) and of the numerical algorithm (spectral decomposition and finite difference method of the transformed beam equation) for high intensity sound beams. A new effect, nonlinear defocusing of the beam, is uncovered. (C) 1995 Acoustical Society of America.