Patent ID: 11956601
Assignee: GOVERNMENT OF THE UNITED STATES OF AMERICA, AS REPRESENTED BY THE SECRETARY OF THE AIR FORCE
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. An interferometric microphone calibrator for comparison calibrating a test microphone, the interferometric microphone calibrator comprising:
an interferometer in optical communication with the test microphone and a reference microphone and that produces an interferometer measurement light, communicates the interferometer measurement light to the test microphone and the reference microphone, and receives an interferometer backscattered light from the test microphone and the reference microphone, such that a sensitivity of the test microphone is interferometrically calibrated to the reference microphone from the interferometer backscattered light according to:, ❘
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a preamplifier-controller in electrical communication with the test microphone, and that receives a driver signal from a microphone driver and drives the microphone driver in a transmission mode based on the driver signal;
the microphone driver in electrical communication with the preamplifier-controller and that receives a driver control signal from a calibration controller and produces the driver signal based on the driver control signal; and
a calibration controller in electrical communication with the microphone driver and that produces the driver control signal and communicates the driver control signal to the microphone driver.