发明名称 Electroacoustic transducer of the electret type.
摘要 <p>An electroacoustic transducer of the electret type, comprising a case (101) having an opening (102) via which the interior of the case communicates with the surroundings; a backplate (105) and a diaphragm (107) arranged opposite the backplate in the case, the surface of the backplate being provided at least partly with an electret material (106) and at least a part of the surface of the diaphragm being provided with an electrically conductive layer (110); and an annular element (109) for securing the circumference of the diaphragm to the inside wall of the case. According to the invention, the parasitic capacity between the backplate (105) and the annular element (109) is eliminated in that the backplate and the annular element are both electrically connected with the case and thereby have the same potential as the case. This also provides production-technical advantages. &lt;IMAGE&gt;</p>
申请公布号 EP0533284(A1) 申请公布日期 1993.03.24
申请号 EP19920202842 申请日期 1992.09.16
申请人 MICROTEL B.V. 发明人 VAN HALTEREN, AART ZEGER
分类号 H04R19/01;H04R25/00 主分类号 H04R19/01
代理机构 代理人
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