An Audiomoth could be a great form factor for underwater acoustics. Sample rates of 384kHz are fine for harbour porpoises (the highest frequency species (sort of)) and the form factor appears to be very user friendly. SoundTraps by OceanInstruments are ultra low power ~ $200 alternative open boarda, however, these require users to solder USB connectors and batteries so not quite as neat a solution. Do you reckon there's any chance that the next Audiomoth design could provide 3 pins which would allow a hydrophone to be connected (signal, return and 3.3V for pre-amplifier power)? Potting such a device with a SubConn connector for USB connection and a hydrophone could allow us to make inexpensive underwater recorders- something definitely needed in the marine mammal bio acoustics community.
