In the Welcome Session Akiba mentioned using ePTFE for waterproofing mics. Is this membrane suitable for application with mics that are used for detecting ultrasound signals, e.g., bat echolocation calls? I looked at some documentation and the responsiveness appears to be significantky reduced at higher frequencies. Does anyone have any experience with this material or suggestion for other materials?
16 November 2020 4:41pm
Would ultrasonic trransducers also work as ultrasound microphones? If so, there are waterproof ultrasonic transducers that exist. It's possible to encase these either in silicone rubber, epoxy, or stuff into a cable gland to have a waterproof ultrasonic microphone. I've attached a pic of one for reference.