Hi,
I hope the folowing links will help you.
engineersgarage.com/electronic-circuits/relay-control-sound
engineersgarage.com/electronic-circuits/relay-control-mic
engineersgarage.com/electronic-circuits/sound-operated-led-circuit
engineersgarage.com/electronic-circuits/sound-operated-switch
engineersgarage.com/electronic-circuits/9-way-clap-switch