VU Meters

(Showing 10 of 10)

Hoyt Analog VU (Volume Unit) Meters measure sound as electrical signals in audio equipment. For all you engineers, VU meters are 200 μA DC d’Arsonval movement ammeters fed from a full wave copper-oxide rectifier. They measure average sound levels and are designed to represent the way human ears perceive volume, so that a reading of 0 VU (the “optimum audio level” or ideal constant voltage) represents +4 dBm, or 1.228 volts RMS across a 600-ohm load. The rise time of a VU meter (the time it takes to register the level of a sound) and the fall time (the time it takes to return to a lower reading) are both 300 milliseconds.