I'm working on a project that features a water-tight enclosure. It's not hermetically sealed -- there's a pressure relief valve -- but the customer wants it to work while waterproof.
Any suggestions for getting sound out? I was thinking of cutting the backing away from part of the front panel and sticking a piezo speaker to the back side; essentially using the front panel plastic as the surface that couples the sound to the outside air.
The more I write, the more it sounds completely batty. Observations and suggestions are appreciated.