This circuit cuts the audio for a few seconds between words, which allows ads to be detected, since this does not occur in music. The circuit is a from Radio Electronics Experimenter from 1989.
This circuit, which can be used as a shield, was found in General Electric documentation from the...
In figure 1 we have an application for NLAS5113, a new device from On Semiconductor...
We found this circuit in an old documentation. Transistor can be BC548 and relay according to...