Psophometric voltage

Psophometric voltage is a circuit noise voltage measured with a psophometer that includes a CCIF-1951[1] weighting network.

The weighing curve of the CCIF 1951[1]

"Psophometric voltage" should not be confused with "psophometric emf," i.e., the emf in a generator or line with 600 Ω internal resistance. For practical purposes, the psophometric emf is twice the corresponding psophometric voltage.

Psophometric voltage readings, V, in millivolts, are commonly converted to dBm(psoph) by dBm(psoph) = 20 log10V – 57.78.

References
  •  This article incorporates public domain material from the General Services Administration document: "Federal Standard 1037C".
  1. "The History of Low-Level Audio Background Noise Measurement". realfield.com. Retrieved 2018-09-14.
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