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首页> 外文期刊>The Journal of the Acoustical Society of America >A three-dimensional sound intensity measurement system for sound source identification and sound power determination by ln models
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A three-dimensional sound intensity measurement system for sound source identification and sound power determination by ln models

机译：ln模型确定声源和确定声功率的三维声强测量系统

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This paper describes a full vector intensity probe which advances the field of sound intensity and sound source direction estimation using six matched rotating and variable directional microphones. The probe has three pairs of microphones at an equal spacing of 30 mm that are set up in each of the x, y, and z directions and share the same observation point. The calibration method using the rotating microphone system is effective to correct position errors in the y- and z-axes microphone pairs. Sound intensity measurements using the variable directional microphone method can locate with accuracy a sound source, i.e., the structure parts radiating most acoustic energy. The system can find the maximum sound intensity level and beamwidth of the major lobe, and the peak sound intensity levels of the minor lobes. Therefore, a procedure for sound power determination based on minimum measurement data is theoretically and experimentally discussed. Consequently, it is possible to reconstruct only parts of the system emitting the most noise and measure efficiently the sound power level. (c) 2005 Acoustical Society of America.
机译：本文介绍了一种全矢量强度探头，该探头使用六个匹配的旋转和可变方向的麦克风来提高声音强度和声源方向的估计范围。探头在x，y和z方向分别设置了三对等间距30 mm的麦克风，它们共享相同的观察点。使用旋转麦克风系统的校准方法可以有效地校正y轴和z轴麦克风对中的位置误差。使用可变方向性麦克风方法进行的声音强度测量可以准确地定位声源，即辐射出最多声能的结构部件。该系统可以找到主瓣的最大声强级别和波束宽度，以及次瓣的最大声强级别。因此，在理论上和实验上讨论了基于最小测量数据确定声功率的过程。因此，有可能只重建发出最多噪声的系统部分，并有效地测量声功率级。 （c）2005年美国声学学会。

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