In this paper, the acoustic impedance caused by the sound radiation at the terminals of the aperture, which is laid on the cylindrical surface, is analysed on the base of rigorous sound theory.

本文根据严格的声学理论，分析了圆柱面上小孔端面由于辐射所产生的声阻抗率。

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The circuit substrate (100) is provided with an aperture region. As the speaker (2) is disposed on that region, a test sound wave is output to the moving section of the microstructure.

而且，在电路基板(100)中设置开口区域，在其上装载扬声器(2)，由此对微小结构体的可动部输出测试声波。

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