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<Randall P. Wagner> is a <physicist> at the US National Institute of Standards and Technology whose research includes acoustic measurement. In 2011, Wagner and colleagues described improved <microphone reciprocity calibration> for laboratory-standard <microphones>.

The method measures pairs of <microphones> coupled through air-filled cavities, using reciprocity to determine <pressure> sensitivity. Comparing long and short coupling cavities tests corrections rather than assuming one apparatus geometry is exact. The reported service covered 31.5 hertz to 20 kilohertz and reduced stated <measurement uncertainty> relative to the previous service. This supports a traceable conversion from <electric potential difference> to <sound pressure>.<New Measurement Service for Determining Pressure Sensitivity of Type LS2aP Microphones by the Reciprocity Method by Randall P. Wagner and others>[2011, p. 761 abstract and measurement-system description]{ref}

Institutional profile: https://www.nist.gov/people/randall-p-wagner.


 Randall P. Wagner (source code)