I'm looking for a simple voice activity detector circuit (VAD) I can put between the audio output of a VHF receiver and an Arduino. I already have a positive logic signal from the receiver to the Arduino that says that the receiver is receiving a carrier (Carrier Operated Squech=COS) detector.
I would like to have a second detector whose output says that there is a strong likelyhood that the carrier that the receiver is detecting is modulated with human voice. I dont need to recognize what is being said; just that the receiver is detecting a voice-modulated transmission.
I would like to have a second detector whose output says that there is a strong likelyhood that the carrier that the receiver is detecting is modulated with human voice. I dont need to recognize what is being said; just that the receiver is detecting a voice-modulated transmission.