分析了点声源组和线声源的指向性。
The directivity of the group of the point source and the line source is analyzed.
本门课程为应用指向性课程。
警察的力量锻炼方法具有较强的指向性特征。
The police's strength exercise method has stronger directional characteristics.
频率范围宽的单指向性话筒，高质量的拾音效能。
Has a microphone with a single directivity and a wide frequency range.
他们虽然存在着差异性，但其最初的指向性是一致的。
There are difference between them but the direction of beginning are identical.
推导出了此类换能器的远场指向性和近场声压的表达式。
The eXpression of directivity of far field and near field was derived.
铁路列车运行噪声的水平指向性是铁路列车噪声辐射的重要特性之一。
The horizontal direction of train running noise is a important character of train radiating noise.
铁路列车运行噪声的水平指向性是铁路列车噪声辐射的重要特性之一。
The horizontal direction of train running noise is a important character of train radiating noise.
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