What I need is a sound (voice) activated latching switch 12 volt dc that will handle around 10 amps. It needs to quickly complete a circuit on the first sound, then open the circuit quickly on the second sound. Example: say the word "on" and the switch completes the circuit and holds it until you say "off" then the circuit is broken. The switch sensitivity needs to be adjustable. I'm going to use a throat mic with this switch. I have searched several weeks without any luck. I did find two through some of the disability sites but neither would do all I'm looking for. The "clap" switches I found don't work on the first sound and are not 12 volt. If needed, I would also be interested in a person that could build this switch for me. TIA