Systems and methods for acoustic sensing

Details Systems and methods for acoustic sensing Systems and methods for acoustic sensing

2008-05-20

2011-12-13

Richards, N Drew (Department: 2895)

Active solid-state devices (e.g., transistors, solid-state diode

Responsive to non-electrical signal

Physical deformation

C257S245000, C257S254000

Reexamination Certificate

active

08076737

ABSTRACT:
An optical-based acoustic sensor system detects sound. An exemplary embodiment has a substrate with a surface and an internal region; a shell disposed above the substrate surface, the shell operable to receive incident light emitted by a light source; a beam disposed blow the shell; a photodiode on the substrate surface below the beam, and in response to receiving a first portion of light, the photodiode is operable to generate a charge that attracts the beam such that a motion is induced in the beam to cause the beam to resonate; and a microphone device coupled to the shell, the microphone device operable to detect acoustic waves, and operable to modulate the vibratory motion of the beam, wherein a second portion of light is modulated by the vibratory motion of the beam to generate sound-modulated light that is emitted from the sensor.

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Daniel Youngner, Systems and Methods for Remote Optical Sensing, U.S. Appl. No. 12/108,446, U.S.

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