Water resistant microphone
First Claim
1. A microphone assembly for underwater applications comprising,a housing,a magnet assembly mounted in said housing,acoustic damping means mounted in said housing adjacent to one side of said magnet assembly,a moisture barrier mounted in said housing adjacent to said acoustic damping means,first cover means with drain slots therethrough adapted to be coupled to said one side of said housing,a speech diaphragm mounted in said housing adjacent to the opposite side of said magnetic assembly,a hydrophobic membrane mounted in said housing adjacent to said speech diaphragm, andsecond cover means adapted to be coupled to the opposite side of said housing with apertures therethrough to permit acoustic pressure to be applied to said speech diaphragm.
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Accused Products
Abstract
A microphone for use in underwater applications. The microphone includes a dynamic magnet and coil assembly in a housing which incorporates a hydrophobic membrane. The membrane is sufficiently porous to permit air to pass therethrough. However, water cannot pass through the membrane. The housing permits water to drain away whereby a superior underwater microphone is obtained. This invention provides the diver with a military-style noise canceling microphone that retains exceptional sound reproduction quality because it is not encapsulated. However, the new microphone can be repeatedly exposed to the marine environment without failure.
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Citations
22 Claims
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1. A microphone assembly for underwater applications comprising,
a housing, a magnet assembly mounted in said housing, acoustic damping means mounted in said housing adjacent to one side of said magnet assembly, a moisture barrier mounted in said housing adjacent to said acoustic damping means, first cover means with drain slots therethrough adapted to be coupled to said one side of said housing, a speech diaphragm mounted in said housing adjacent to the opposite side of said magnetic assembly, a hydrophobic membrane mounted in said housing adjacent to said speech diaphragm, and second cover means adapted to be coupled to the opposite side of said housing with apertures therethrough to permit acoustic pressure to be applied to said speech diaphragm.
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22. A microphone assembly for underwater applications comprising,
a housing, a magnet assembly mounted in said housing, said magnetic assembly includes a generally cylindrical magnet with an annular groove therein around the axis thereof, an acoustic damping device mounted in said housing adjacent to one side of said magnet assembly, a moisture barrier mounted in said housing adjacent to said acoustic damping means, a mounting disk for supporting said moisture barrier, first cover means with drain slots therethrough adapted to be coupled to said one side of said housing, a speech diaphragm mounted in said housing adjacent to the opposite side of said magnetic assembly, a hydrophobic membrane mounted in said housing adjacent to said speech diaphragm, a support ring interposed between said hydrophobic membrane and said speech diaphragm for supporting said speech diaphragm, and second cover means adapted to be coupled to the opposite side of said housing with apertures therethrough to permit acoustic pressure to be applied to said speech diaphragm.
Specification