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Audio Moth 20Khz Hum

Hi All,

I have a very annoying 20Khz hum on the Audio Moth, is this normal or is there a way to reduce or eliminate this? This image is the social chatter in a Common Pipistrelle roost, the 20Khz hum is right across the peak frequency of the bat chatter. NB: The Audio-Moth was operating in USB Live mode.

Many thanks

Andrew

5 comments

5 Comments

julie-annemurphy

Jul 07

Possible noise floor or grounding issue?

I can try to remove the hum in the audio for you if you post a copy?