ELEKTRETWANDLER MIT VERAENDERLICHEM TATSAECHLICHEM LUFTSPALT,申请号DE19823242578-传众专利搜索

ELEKTRETWANDLER MIT VERAENDERLICHEM TATSAECHLICHEM LUFTSPALT

申请公布号：DE3242578(A1)

申请号：DE19823242578

申请日期：1982.11.18

申请公布日期：1983.05.26

申请人：

WESTERN ELECTRIC CO.,INC.

发明人：JOY BUSCH-VISHNIAC,ILENE;LEE WALLACE JUN.,ROBERT;EDWARD WEST,JAMES

分类号：H04R19/00;G01H11/06;H04R19/01;(IPC1-7):04R19/01;04R1/32

主分类号：H04R19/00

摘要：An electret transducer for producing a directional response, electret foil (92) and a backplate (94) with the actual air gap thickness therebetween varying in accordance with a predetermined relationship. The sensitivity of the electret transducer varies inversely as the actual air gap thickness. In one embodiment the actual air gap thickness is realized by a plurality of posts (90) having heights varying according to the aforesaid relationship. In another embodiment, the actual air gap thickness is realized by varying the thickness of the aforesaid backplate.