Loudness controller for TV or radio - has pick=up feeding comparator with adjustable reference, operating gain controller

摘要

A pick-up (2) is coupled with the device (1) for sensing the loudness level and registering the actual loudness level. The signal of this is fed to a comparator (3) that compares it with a variable desired level from the difference there is derived an adjusting signal for the actual level. The pick-up may be a microphone or an electric electronic circuit registering the level at the loudspeaker. The pick-up may be combined with the comparator and level circuit, and the device wirelessly coupled to the gain control arrangement.