I'm building an installation in which artificially constructed walls, when touched, will process a live audio feed. I've been trying to use simple piezo elements attached to the walls with the "meter~" and "past" objects (setting up a threshold so to speak) but the piezo elements lack the ability to differentiate loud hand claps from actual wall vibrations. I've been thinking about using fsr sensors but they seem too precise and pressure based to pick up something so broad. Is there a good sensor available that will detect material vibration and not SPL? Or am I going about this completely wrong?
Here's the patch (still in progress) if you care to take a look. It's a little large and involves a camera feed as well. The numerous mic inputs from the adc will eventually be the wall sensors, right now mic1 is the live audio feed and mic2 is the sensor.