Pressure gradient electret microphone

Details Pressure gradient electret microphone Pressure gradient electret microphone

1978-11-03

1981-03-24

Brown, Thomas W.

179111E, H04R 120, H04R 1904

Patent

active

042582350

ABSTRACT:
A pressure gradient electret microphone provided with a plurality of channels extending between ports located in a ring of plastic material disposed about the periphery of a cylindrical back plate. Each of the channels expanding in horn fashion from the port at the diaphragm chamber to ports in the casing, and the ports in the casing being provided with an electrically conducting shield connected to the electrically conducting casing. In one embodiment of the invention, a line extends from the forward side of the diaphragm, and the line is provided with an aperture adjacent to the diaphragm coupling the diaphragm to the surrounding sound field at frequencies below the critical frequency of the line.

REFERENCES:
patent: 2579162 (1951-12-01), Veneklasen
patent: 2787671 (1957-04-01), Grosskopf et al.
patent: 3007012 (1961-10-01), Olson
patent: 3031538 (1962-04-01), Gorike
patent: 3201530 (1965-08-01), Levy et al.
patent: 3504137 (1970-03-01), Ptackova et al.
patent: 3940575 (1976-02-01), Bauer
patent: 3944756 (1976-03-01), Lininger

Affiliated with

Also associated with

Rating

Pressure gradient electret microphone does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Pressure gradient electret microphone, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pressure gradient electret microphone will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2409432