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