HydroMoth

HydroMoth hardware is directly compatible with all AudioMoth firmware, meaning you can use the device in any number of underwater applications, from scheduled recording in coral reefs, to triggering recordings by amplitude or frequency in freshwater ponds. HydroMoth has improved LED visibility and more accurate time keeping for long deployments. It also has an in-built magnetic reed switch, which enables recordings to be started and stopped in wet conditions without opening the case. HydroMoth is sold with the AudioMoth Underwater Case as standard, with the option to add a waterproof magnetic key chain fob to make use of the magnetic reed switch. Included in kit  HydroMoth 1.0.1 Features EFM32 Gecko processor Capable of recording uncompressed audio to micro SD from 8k to 384k samples/second Records uncompressed WAV files to SD card Powered by 3 x AA batteries Analog MEMS microphone acts as contact hydrophone Analog pre-amplifier with adjustable gain Configurable USB interface Onboard real-time clock keeps track of time in UTC Improved 32.768 kHz MEMS oscillator to reduce clock drift Tested to a depth of 30m for 2 months Applications  Boat noise monitoring Freshwater sound surveys Coral reef soundscape monitoring Cetacean underwater acoustic studies AudioMoth vs. HydroMoth AudioMoth  HydroMoth Notes Conformal Coating No Yes Decreases the chance of water damage Magnetic Switch No Yes Enables recordings to be started and stopped in wet conditions without opening the case. Clock Standard Improved 32.768 kHz MEMS oscillator to reduce clock drift Status LED Location Standard Location In the corner for improved visibility in clear case External Microphone Compatibility Exposed Headers for Optional 3.5mm jack No Exposed headers on AudioMoth 1.2.0 onwards GPIO Pads Yes No Underwater Recordings Yes (not recommended) if used with Clear Underwater Case Yes if used with Clear Underwater Case Terrestrial Recordings Yes Yes (not using clear underwater case) Without a case or using the green AudioMoth case Sample Rate  Up to 384kHz  Up to 384kHz HydroMoth frequency response inside the underwater case will be attenuated above 40k Power 3 x AA Batteries 3 x AA Batteries AudioMoth Software Fully Compatible Fully Compatible   How Other Scientists, Ecologists, (& Basically Cool People) Have Used the HydroMoth: @RobinSandfort: 20 minutes from post box to pond. Our first dedicated #hydromoth arrived. Can‘t wait for some underwater #bioacoustics. Show us your freshwater hydromoth sites! #capreolus   @and1hill: Very exciting! My first #HydroMoth recording of dolphins off the coast of Exmouth. Recorded at 250kHz and downsampled to 32kHz to improve SNR ⁦@OpenAcoustics @900hz: #HydroMoth listening and an Egret looking in this tidal pool full of life Important Notes International Duties and Taxes are not included, you may be required to pay these before delivery. Once your order is shipped you will receive an automatic email with your tracking information.  Hydromoth HTSUS 8519.81.25.00, Country of Origin USA, ECCN EAR99 About Open Acoustic Devices Open Acoustic Devices designs, supports, and deploys open-source acoustic hardware and software for our user community, as well as our own environmental and wildlife monitoring projects. Their main product is AudioMoth, a low-cost, open-source acoustic monitoring device which has been used in multiple applications, including automating the search for an elusive insect species, monitoring poaching by gunshot and listening for ultrasonic bat calls. Their goal is to improve the accessibility and usability of acoustic technology for conservation using open-science.