Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Microphone capsule only
Reexamination Certificate
2007-01-30
2007-01-30
Ni, Suhan (Department: 2615)
Electrical audio signal processing systems and devices
Electro-acoustic audio transducer
Microphone capsule only
C381S369000, C381S191000
Reexamination Certificate
active
10725894
ABSTRACT:
Affixed in intimate contact to the inside surface of a front board10aof a conductive capsule10provided with a receiving sound aperture10aais a conductive back electrode board provided with air vent apertures11a,11bwhich are positioned not in alignment with the receiving sound aperture, these apertures10aand11a,11bbeing connected by a slit10ad.A polarized FEP film12which is an electret film is disposed on the surface of the back electrode board11opposite from the front board 10a, and a conductive diaphragm14is disposed on the surface of the FEP12opposite from the back electrode board11with a spacer13interposed therebetween which extends around the outer periphery of the opposite surface of the FEP12.These component parts are accommodate in the capsule10to constitute an electret condenser microphone which is capable of suppressing sensitivity degradation due to ingress of grit from the outside to the electret film.
REFERENCES:
patent: 4302633 (1981-11-01), Tamamura et al.
patent: 4321432 (1982-03-01), Matsutani et al.
patent: 4621171 (1986-11-01), Wada et al.
patent: 5272758 (1993-12-01), Isogami et al.
patent: 2003/0068055 (2003-04-01), Tanabe et al.
patent: 2005/0089180 (2005-04-01), Saeki et al.
patent: 0 319 010 (1989-06-01), None
patent: 0 531 613 (1993-03-01), None
patent: S57-155890 (1982-09-01), None
patent: H05-0233698 (1993-03-01), None
patent: 2548543 (1997-05-01), None
patent: 11150795 (1999-06-01), None
patent: 1 427 250 (2004-09-01), None
Fukada Naosuke
Izuchi Toshiro
Kozawa Hideki
Yamagata Hiroshi
Dabney Phylesha
Gallagher & Lathrop
Hosiden Corporation
Lathrop, Esq. David N.
Ni Suhan
LandOfFree
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 Microphone, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Microphone will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3810365