Hi Mike, We are working on this at the moment and are designing a pre-amp board that will allow the connection of bare hydrophones and piezo contact microphones. We're focusing mainly on fresh water applications at the moment. We should have some results in a month or so. AudioMoth is designed to accept electret capsule microphones and hydrophones such as the Aquarian Audio H2 which include a pre-amp in the hydrophone body. Alex
These hydrophones use an internal preamp which will require a separate 6.8V power supply. The preamps comes in three variants - voltage, current and differential voltage - and each would need a custom designed circuit in order to connect it to AudioMoth.
Hi Mike, We are working on this at the moment and are designing a pre-amp board that will allow the connection of bare hydrophones and piezo contact microphones. We're focusing mainly on fresh water applications at the moment. We should have some results in a month or so. AudioMoth is designed to accept electret capsule microphones and hydrophones such as the Aquarian Audio H2 which include a pre-amp in the hydrophone body. Alex