Coil and microphone mounting for frequency correction in...

Details Coil and microphone mounting for frequency correction in... Coil and microphone mounting for frequency correction in...

H - Electricity

04

R

349/86

H04R 1/28 (2006.01) G01H 13/00 (2006.01) H03H 3/00 (2006.01) H03H 3/013 (2006.01) H04R 9/18 (2006.01)

Patent

CA 1080343

Abstract of the Disclosure A coil and microphone mounting for receiving an excitation coil and a microphone transducer in a protective housing having a detachable end plate provided with a throughgoing tube allowing pressure waves to reach the trans- ducer and with throughgoing ferrite core elements allowing magnetic flux from the coil to escape. The mounting has particular application to connec- tion of mechanical resonators by laser bombardment or sand blasting during which the transducer and coil are protected by the end plate.

259134

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