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Determination of Wave Motion Correction Values Required for Comparison Calibrations of a New Working Standard Microphone.

Published

Author(s)

Randall P. Wagner, Victor Nedzelnitsky

Abstract

Comparison calibrations of microphones based on the reciprocity method are performed with both the microphone under test and a reference standard microphone inserted into an acoustical coupler. For these calibrations, the wave motion correction W is needed to account for the departure from spatially uniform sound pressure amplitude in the coupler at frequencies for which the coupler interior dimensions are not small compared to a wavelength of sound. This internal report describes the procedure used to determine the values of W4192 applicable to comparison calibrations of a relatively new working standard microphone, the Bruel and Kjaer model 4192, and provides these values.
Citation
NIST Interagency/Internal Report (NISTIR) - 7526
Report Number
7526

Keywords

Acoustical calibration, calibration of microphones, microphone calibration, NIST microphone calibration, reciprocity calibration, standard microphone, wave motion correction, working standard microphone.

Citation

Wagner, R. and Nedzelnitsky, V. (2008), Determination of Wave Motion Correction Values Required for Comparison Calibrations of a New Working Standard Microphone., NIST Interagency/Internal Report (NISTIR), National Institute of Standards and Technology, Gaithersburg, MD, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=824744 (Accessed February 25, 2024)
Created December 11, 2008, Updated February 19, 2017