由振预声技术初探

以脉动半球声源和固定圆板的一阶振型假设为基本物理模型，导出了不同频率下的振 声转换公式，由此求出振动板上某一点处的界面声压级。然后根据平均界面声压级及空间某点的坐标，求出振动板在空间声场中该点的声压级。

A Primary Discussion of Presound Technique from Vibration

An acoustic source characterized by a pulse hemisphere together with a fixed plate being regarded as a first order vibration type is hypothesized to be a basic physical model, therefrom, an equation for converting vibration at all different frequencies into sound is derivated and reasoned out. Followingly, an interfacial acoustic pressure level at a certain point on the vibrating plate is found with this equation. Herein, according to the acoustic pressure level at an average interface, and to a coordinate in relation to the point in space which is located in a space sound field, the acoustic pressure level concerning the vibrating plate is found.