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Microphone question ?

in Device Purchase

Hi there, I just discovered your AudioMoth device and I have a question about the microphone.

What is the type of microphone you embedded inside of it ?

Is there a jack input available to use our own microphone ?

Thanks a lot for your answer

Julien

5 comments

5 Comments

Alex Rogers

Nov 15, 2019

Hi, We use a Knowles SPM0408LE5H-TB-6 microphone - https://datasheet.octopart.com/SPM0408LE5H-TB-Knowles-Acoustics-datasheet-14433657.pdf.

There isn't a jack on the current version of AudioMoth but the next version will have the mounting footprint to for a 3.5mm jack on the top face so that it can be used with electret microphones and hydrophones. Alex

Jean Weber

Dec 21, 2019

Replying to

Adding an additional pre-amp would be fantastic. I am not in electronics, but I guess that the difficulty could be to get it working with low self-noise and low power consumption. SPM0687LR5H has a noise-floor of 24db instead of 31db for SPM0408LE5H-TB-6 and less distortion (Invensense’s latest ICS-40730 is given for a noise floor of 20db). A well designed additional pre-amp could significantly reduce the noise for more distant recordings.