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.

  • EFM32 Gecko processor

  • Capable of recording at sample rates up to 384kHz

  • Records uncompressed WAV files to microSD card

  • Can be converted into a full-spectrum USB microphone

  • Powered by 3 x AA batteries

  • Analog MEMS microphone

  • Analog pre-amplifier with adjustable gain

  • Measures just 58 x 48 x 15 mm

  • Configurable USB interface

  • Onboard real-time clock keeps track of time in UTC

  • Exposed header for 3.5mm jack mic from version 1.2.0 onwards 

Click Getting Started for help setting up a new AudioMoth.

To download a manual containing all AudioMoth information for offline usage click

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.

  • Power socket (JST-PH) supporting 3.7 - 6V batteries

  • All controls, indicators and IO ports broken out to 5 JST-PH style headers

  • 3.5 mm jack socket for external electret condenser microphones

  • Compatible with all AudioMoth software


To download a datasheet containing all AudioMoth Dev details click here.




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.

  • Power socket (JST-PH) supporting 3.7 - 6V batteries

  • Measures just 32 x 24 mm

  • Weighs just 5g (excluding battery)

  • Compatible with all AudioMoth software

To download a datasheet containing all μMoth details click 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 environments.

  • Injection-moulded polycarbonate protective case

  • Sealed using an easy-to-use clasp and compression o-ring

  • Rain hood designed to prevent water pooling

  • Microphone opening protected by a Porelle acoustic vent

  • Comes with adjustable velcro strap

  • Available in green and black

More technical information is available here.