AudioMoth
AudioMoth is a low-cost, full-spectrum acoustic logger, based on the Gecko processor range from Silicon Labs. Just like its namesake the moth, AudioMoth can listen at audible frequencies, well into ultrasonic frequencies. It is capable of recording uncompressed audio to microSD card at rates from 8,000 to 384,000 samples per second and can be converted into a full-spectrum USB microphone.
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EFM32 Gecko processor
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Capable of recording at sample rates up to 384kHz
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Records uncompressed WAV files to microSD card
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Can be converted into a full-spectrum USB microphone
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Powered by 3 x AA batteries
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Analog MEMS microphone
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Analog pre-amplifier with adjustable gain
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Measures just 58 x 48 x 15 mm
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Configurable USB interface
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Onboard real-time clock keeps track of time in UTC
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Exposed header for 3.5mm jack mic from version 1.2.0 onwards
Click Getting Started for help setting up a new AudioMoth.
A manual containing all AudioMoth information for offline usage, is available here.
AudioMoth | HydroMoth | AudioMoth Dev | μMoth | Accessories
HydroMoth
HydroMoth is a variant of the standard AudioMoth specifically designed to be deployed in the underwater case.
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Re-positioned LEDs for improved visibility in the underwater case
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Improved 32.768 kHz MEMS oscillator to reduce clock drift
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In-built magnetic reed switch, which enables recordings to be started and stopped in wet conditions without opening the case.
An application note containing examples of HydroMoth deployments,
is available here.
AudioMoth Dev
AudioMoth Dev is a variant of the standard AudioMoth designed as a development board for skilled users to integrate into other boards and products.
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Power socket (JST-PH) supporting 3.7 - 6V batteries
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All controls, indicators and IO ports broken out to 5 JST-PH style headers
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3.5 mm jack socket for external electret condenser microphones
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Compatible with all AudioMoth software
The AudioMoth Dev datasheet is available here.
μMoth
μMoth is a micro-size variant of the standard AudioMoth 1.1.0 open-source design, while maintaining full compatibility with all versions of the existing firmware.
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Power socket (JST-PH) supporting 3.7 - 6V batteries
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Measures just 32 x 24 mm
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Weighs just 5g (excluding battery)
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Compatible with all AudioMoth software
The μMoth datasheet is available here.
IPX7 Waterproof Case
The AudioMoth IPX7 Waterproof Case is designed specifically for AudioMoth version 1.0.0, 1.1.0 and 1.2.0 (without the 3.5mm socket). The case is made from injection-moulded polycarbonate and comes with an adjustable velcro strap, which makes securing AudioMoth simple and easy. The case is compact and highly resilient and will house AudioMoth for extended periods of time in a wide variety of terrestrial environments.
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Injection-moulded polycarbonate protective case
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Sealed using an easy-to-use clasp and compression o-ring
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Rain hood designed to prevent water pooling
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Microphone opening protected by a Porelle acoustic vent
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Comes with a removable adjustable velcro strap
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Available in green
An application note describing the IPX7 Waterproof Case,
is available here.
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Underwater Case
The AudioMoth Underwater Case enables a standard AudioMoth to make recordings underwater. The case is designed specifically for AudioMoth version 1.2.0 (without the 3.5mm socket). Although other versions of AudioMoth will fit inside the case, we recommend version 1.2.0 to minimise self-noise in recordings. The case is made from injection-moulded polycarbonate and comes with an adjustable velcro strap, which makes securing AudioMoth simple and easy. The case is compact and highly resilient and will house AudioMoth for extended periods of time at depths of 30-60m.
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Injection-moulded polycarbonate protective case
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Sealed using an easy-to-use clasp and compression o-ring
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Submersible underwater case
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Tested to a depth of 30m for 2 months
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Comes with a removable adjustable velcro strap
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Available in frosted transparent
An application note describing the use the Underwater Case,
is available here.
AudioMoth GPS Board
The AudioMoth GPS Board is a hardware module that extends AudioMoth with a connected GPS module and magnetic switch. The AudioMoth GPS Board comes in two variants, using different GPS modules: the PA1616S module that uses GPS satellites only, and the PA1616D module that uses both GPS and GLONASS satellites.
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Interfaces with AudioMoth using the GPIO and power pads / headers
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Automatically supported by the standard AudioMoth firmware
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Also compatible with the AudioMoth-GPS-Sync firmware
An application note describing the use the AudioMoth GPS Board,
is available here.
