Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Having electrostatic element
Reexamination Certificate
2007-08-15
2011-10-04
Garber, Charles (Department: 2812)
Electrical audio signal processing systems and devices
Electro-acoustic audio transducer
Having electrostatic element
C381S190000, C381S389000
Reexamination Certificate
active
08031890
ABSTRACT:
An electroacoustic transducer serving as a speaker or a microphone is reduced in size and weight and is capable of generating sound with relatively high sound pressure. It is constituted of a housing having a cavity having an opening in the exterior, a fixed electrode positioned opposite to the opening of the housing, a diaphragm having an electrode positioned between the opening and the fixed electrode, and an elastic deformation portion for supporting the diaphragm with respect to the housing and for allowing the diaphragm to vibrate in the thickness direction. The fixed electrode is electrically insulated from the electrode of the diaphragm. The diaphragm is distanced from the fixed electrode by means of the elastic deformation portion placed in the balanced state. When the elastic deformation portion is subjected to elastic deformation, the diaphragm vibrates with relatively large amplitude such that it comes in contact with the fixed electrode.
REFERENCES:
patent: 2003/0044029 (2003-03-01), Gabriel et al.
patent: 2003/0068055 (2003-04-01), Tanabe et al.
patent: 2006/0210106 (2006-09-01), Pedersen
patent: 10-2000-0059183 (2002-04-01), None
Ebihara Yuusaku
Omura Masayoshi
Suzuki Toshihisa
Abdelaziez Yasser
Dickstein & Shapiro LLP
Garber Charles
Yamaha Corporation
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