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Search Publications by: Randall P Wagner (Fed)

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Displaying 1 - 19 of 19

Primary Sound Standard Based On Dynamic Fabry Perot Interferometry

September 21, 2023
Author(s)
Akobuije Chijioke, Richard A. Allen, Steven E. Fick, Benjamin Reschovsky, Jared Strait, Randall P. Wagner
We describe an optical sound standard in which the sound pressure is measured by using a high-finesse optical cavity to observe the induced change in the refractive index of the medium (acousto-optic effect). The optical refractive index of a substance

Optical-cavity-based primary sound standard

February 1, 2023
Author(s)
Akobuije Chijioke, Richard A. Allen, Steven E. Fick, David Long, Benjamin Reschovsky, Jared Strait, Randall P. Wagner
We propose an optical sound standard in which the sound pressure is directly measured by using an optical cavity to observe the induced change in the refractive index of air. In this method, an optical cavity is coupled with an acoustic cavity, with the

Laser-based comparison calibration of laboratory standard microphones

August 30, 2021
Author(s)
Randall P. Wagner, Richard A. Allen, Qian Dong
A precision laser-based comparison calibration method for laboratory standard microphones is described that uses reference microphones calibrated by the pressure reciprocity method. Electrical drive current and diaphragm velocity are measured while the

NIST Hearing Aid Test Procedures and Test Data

March 1, 1994
Author(s)
Randall P. Wagner, E D. Burnett
A description is given of the hearing aid testing done for the Department of Veterans Affairs. Emphasis is given to the determination of the insertion frequency response using Fast Fourier Transform (FFT) techniques, but the other measurements entailed are

NIST Hearing Aid Test Procedures and Test Data

March 2, 1992
Author(s)
Randall P. Wagner
A description is given of the hearing aid testing done for the Department of Veterans Affairs. Emphasis is given to the determination of the insertion frequency response using Fast Fourier Transform (FFT) techniques, but the other measurements entailed are
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