Horizontal resolution in color was quoted as 250 lines in advertising materials, stretching to 300 lines in black-and-white, with a video signal-to-noise ratio of 45 dB . Audio response was specified as 80 to 10, 000 Hz at-6 dB in STD mode, dropping to 80 to 8, 000 Hz in LP mode.
12.
In telecommunications, an "'audio response unit "'( ARU ) is a device that provides synthesized voice responses to DTMF keypresses by processing calls based on ( a ) the call-originator input, ( b ) information received from a database, and ( c ) information in the incoming call, such as the time of day.
