Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Microphone capsule only
Reexamination Certificate
2011-07-05
2011-07-05
Goins, Davetta W (Department: 2614)
Electrical audio signal processing systems and devices
Electro-acoustic audio transducer
Microphone capsule only
C381S174000, C381S325000
Reexamination Certificate
active
07974430
ABSTRACT:
In order to automate a microphone assembly process including a dust-proof treatment, an object of the present invention is to provide a dust-proof microphone having a configuration suitable for automated assembly.According to the present invention, a microphone has a plate-like or film-like dust-proof section that is disposed in a conductive housing (capsule) having a sound aperture and covers the sound aperture. The dust-proof section has a plurality of pores at least in a region corresponding to the sound aperture, and the dust-proof section further has a nonporous region. In the case of an electret condenser microphone, from the viewpoint of performance of the microphone, the dust-proof section is conductive. In addition, taking into account a soldering in a reflow furnace, the dust-proof section is heat-resistant. Each pore is desirably designed taking into account the environment for the usage of the microphone. However, if it is supposed that the microphone is used near one's mouth, each pore has an area of 0.01 mm2or less. In addition, to enhance the dust-proof effect, the pores may be subjected to a water-repellent treatment.
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Izuchi Toshiro
Nakanishi Kensuke
Onishi Hiroaki
Ono Kazuo
Eason Matthew
Goins Davetta W
Hosiden Corporation
Lathrop David N.
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