Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1996-12-06
1999-10-19
Hofsass, Jeffery A.
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
25022714, 25022725, 25023119, 367149, H04B 1002
Patent
active
059698381
ABSTRACT:
A noise attenuation system for use with sound receiving devices, including first and second relatively small optical microphone devices having at least one sound responsive membrane operative to produce an output signal in accordance with sound waves picked up by the optical microphone devices, at least one pair of light guides affixed to the first or second optical microphone devices, the pair of light guides each having an input end portion and an output end portion, the input end portion of a first light guide is connectable to a source of light and the output end portion of the second light guide is connectable to a light intensity detecting means. Each of the output portion of the first light guide and input end portion of the second light guide has an axis and a rim and is oriented with respect to each other to include an angle between the axes, and each of the light guide rims is cut at an angle with respect to the axis of its light guide. In operation, the intensity of light reflected by the membrane and detected by the light intensity measuring means, represents the difference in sound intensities picked up by the first and second optical microphone devices.
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Kots Alexander
Paritsky Alexander
Hofsass Jeffery A.
Phone - Or Ltd.
Tweel , Jr. John
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