公开(公告)号：US08848963B2

公开(公告)日：2014-09-30

申请号：US13716764

申请日：2012-12-17

申请人： Savox Communications Oy Ab (Ltd)

发明人： Jorge Menyhart ,  Edwin F. Poppert, II

IPC分类号： H04R1/04

CPC分类号： H04R1/04 ,  A62B18/08 ,  H04R1/086 ,  H04R1/2807 ,  H04R1/342 ,  H04R1/38

摘要： An electro-acoustical transducer device includes a body structure (101) and a differential microphone (102) located in an aperture of a wall of the body structure. The microphone includes a front side for receiving an acoustical signal and a rear side for receiving the acoustical signal in modified form. The differential microphone is arranged to produce an electrical output signal proportional to the difference of the acoustical signals at the front and rear sides. The body structure is arranged to form a chamber (105) shared with the rear side of the microphone. There are tubular channels (107) to the chamber so that the channels and the chamber constitute an acoustical filter for filtering the acoustical signal falling to the rear side of the microphone. With proper design of the chamber and the channels, it is possible to achieve acoustical filtering for background noise rejection.

摘要翻译： 电声换能器装置包括主体结构（101）和位于身体结构的壁的孔中的差速麦克风（102）。 麦克风包括用于接收声学信号的前侧和用于以修改形式接收声学信号的后侧。 差分麦克风被布置成产生与前侧和后侧的声音信号的差成比例的电输出信号。 身体结构被布置成形成与麦克风的后侧共享的腔室（105）。 腔室有管状通道（107），使得通道和腔室构成一个声滤波器，用于过滤掉掉在麦克风背面的声学信号。 通过适当设计室和通道，可以实现背景噪声抑制的声学滤波。