Sound-Based Spanking Countdown Detector?

Hi there! I’m a newcomer to this place. Does anyone know if an audio detector exists? My idea is something like a countdown timer for spanking that uses sound detection. The logic would be: when the mic picks up the smack, the count goes on; if it doesn’t hear anything, the counter halts. Then I have to spank myself harder until the mic registers the impact again. Something along those lines.