The high frequency resonance is generated usually by velocity detector used inseam survey.
槽波测量用速度检波器常产生高频谐振,是由于横向激励引起的二次谐振所致.
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This design concept lowers the frequency resonance ( distortion ) of the diaphragm and extends bass response.
这种设计理念降低频共振 ( 失真 ) 的光圈和扩展低音响应.
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