Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Microphone capsule only
Reexamination Certificate
2005-08-30
2005-08-30
Kuntz, Curtis (Department: 2643)
Electrical audio signal processing systems and devices
Electro-acoustic audio transducer
Microphone capsule only
C381S190000, C381S191000, C381S369000, C381S410000, C367S170000, C367S178000, C367S180000, C367S181000
Reexamination Certificate
active
06937735
ABSTRACT:
A microphone is constructed to be more tolerant to a wide range of relative humidity conditions without adversely affecting the performance of the microphone. The microphone includes a housing with a sound port for receiving sound and an electret assembly for converting the sound into an output signal. The electret assembly includes a diaphragm and a backplate. The backplate is made of at least two layers, usually polymeric layers. The first layer of material has a first hygroscopic coefficient and a second layer of material has a second hygroscopic coefficient. The first and second layers cause the backplate to bend in response to higher humidity conditions, thereby minimizing the adverse effects on microphone performance caused by characteristic changes in the diaphragm at the higher humidity conditions.
REFERENCES:
patent: 2490236 (1949-12-01), Shaper
patent: 3068446 (1962-12-01), Ehrlich et al.
patent: 3775572 (1973-11-01), Ishibashi et al.
patent: 4063049 (1977-12-01), Pipitone et al.
patent: 4442324 (1984-04-01), Blanchard et al.
patent: 4550227 (1985-10-01), Topholm
patent: 4607720 (1986-08-01), Hardt
patent: 4634815 (1987-01-01), Marquis
patent: 4736430 (1988-04-01), Schröder
patent: 4739512 (1988-04-01), Hartl et al.
patent: 4764690 (1988-08-01), Murphy et al.
patent: 4850023 (1989-07-01), Yarush
patent: 4852177 (1989-07-01), Ambrose
patent: 4903308 (1990-02-01), Paddock et al.
patent: 4993072 (1991-02-01), Murphy
patent: 5048090 (1991-09-01), Geers
patent: 5097515 (1992-03-01), Baba
patent: 5220612 (1993-06-01), Tibbetts et al.
patent: 5335286 (1994-08-01), Carlson et al.
patent: 5373555 (1994-12-01), Norris et al.
patent: 5388163 (1995-02-01), Elko et al.
patent: 5408534 (1995-04-01), Lenzini et al.
patent: 5530763 (1996-06-01), Aebi et al.
patent: 5548658 (1996-08-01), Ring et al.
patent: 5570428 (1996-10-01), Madaffari et al.
patent: 5740261 (1998-04-01), Loeppert et al.
patent: 5828766 (1998-10-01), Gallo
patent: 5859916 (1999-01-01), Ball et al.
patent: 5881158 (1999-03-01), Lesinski et al.
patent: 6075869 (2000-06-01), Killion et al.
patent: 4329993 (1995-09-01), None
Microtronic, Product News and drawing for “Cylindrical Microphone Series 8000,” 2 pages (Apr. 19, 2001).
de Nooij Michel
de Roo Dion I.
Lafort Adrianus M.
Mögelin Raymond
Jenkens & Gilchrist
Kuntz Curtis
Nguyen Tuan Duc
SonionMicrotronic Nederland B.V.
LandOfFree
Microphone for a listening device having a reduced humidity... 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 for a listening device having a reduced humidity..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Microphone for a listening device having a reduced humidity... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3464527