I plan to use a simple ADC with an adjustable mic amplifier for both ears of this robot. Currently I'm designing the circuit that will allow for either an ADC output or a comparator output with a jumper to choose. I've picked fairly cheap hardware, as I don't need anything fancy to just hear transients.

I'm also looking into acoustic dampening for the servo(s) to make sure they're not adding interference. This may end up being the most expensive part, time and money.

I'm also working in adobe illustrator to design a layout to cut out of plastic or soft metal. These will be brackets to hold the circuit board to the servos.

I've chosen to use a raspberry pi as my platform, as I eventually want to add visual input to the robot. I'm looking into setting up openCV for that purpose.

When my circuit is built I'll test to see how much of a problem reverb can be, taking into consideration a few different environments. The idea is to just program in essentially a debounce function that will wait a certain period of time to turn to another transient.