H - Electricity – 04 – R
Patent
H - Electricity
04
R
347/7, 349/67.2
H04R 1/28 (2006.01) H04M 1/62 (2006.01) H04R 1/08 (2006.01) H04R 7/18 (2006.01) H04R 19/01 (2006.01)
Patent
CA 1264082
ABSTRACT A holder for an electret microphone of the type having a front acoustic aperture and peripheral acoustic apertures is made of insulating material and includes a first sleeve portion of a diameter to receive the microphone snugly and a second sleeve portion of larger diameter. An internal stop limits the extent to which the microphone can be inserted such that the rear portion of the microphone projects into the second sleeve portion. Through holes in the second sleeve portion provide an acoustic passage to the peripheral acoustic apertures. The internal stop is in one embodiment formed by an apertured web. In another embodiment an internal shoulder forms the stop but in that embodi- ment too an apertured web is provided. A concentric small cylinder extends from the web in that case and terminates short of the shoulder. In either embodiment, a rectangular plate is molded with the sleeves and this forms the cover of a microphone enclosure. The invention retains or enhances the acoustic response of con- ventional mounting systems while providing protection against electrostatic discharge.
532720
Bertignoll Friedrich
Pocock Mark Walter
Nortel Networks Limited
Smart & Biggar
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