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发明授权
CN101406068B 弯曲波声学器件及其制造方法 有权

弯曲波声学器件及其制造方法
摘要：
一种声学器件及制造该声学器件的方法。该声学器件包括：膜片(10)，在工作频率范围内具有谐振弯曲波模式；以及耦合于该膜片的多个电机换能器(12)。换能器的定位与机械阻抗使得至少选定数目的谐振弯曲波模式被均衡，从而膜片面积上的净横向模式速度趋向于零，其中通过换能器的定位与机械阻抗基本达到了对谐振弯曲波模式的均衡。膜片的参数可以使得存在多个结点编组位置，在该位置之上或者围绕该位置，汇聚选定数目的谐振模式的结点线。每个换能器可以被安装在所述多个结点编组位置之一之上。
摘要（英）：

An acoustic device and method of making said acoustic device. The acoustic device comprises a diaphragm (10) having resonant bending wave modes in the operating frequency range, and a plurality of electro-mechanical transducers (12) coupled to the diaphragm. The positioning and mechanical impedance of the transducers are such that at least a selected number of the resonant bending wave modes are balanced so that the net transverse modal velocity over the area of the diaphragm tends to zero with the balancing of the resonant bending wave modes being achieved substantially by the positioning and mechanical impedance of the transducers. The parameters of the diaphragm may be such that there are a plurality of nodal grouped locations at or around which the nodal lines of a selected number of resonant modes are clustered. Each transducer may be mounted at one of the plurality of nodal grouped locations.

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