My recordings (made with version 1.1 units ) have quite a lot of white noise and would like to compare to those of others
(in the 0 - 48 kHz range). As far as I understand from other conversations, this is different than the discrete clicks produced by SD cards.
Has anyone made test recordings within a soundproof box with different AUDIOMOTH versions
and different recording parameters (I understand different Gain options must have a lot of impact
in white self noise)?
Is there a guide with advice for deployment (i.e., which Gain use under different circumstances)?
Finally, can anyone suggest filters (and software) for reducing noise in post-processing?
Just wanted to comment with my own test. I recorded 30 seconds of silence with the AudioMoth in a quiet room on a soft couch and under a thick fleece blanket. The self noise measured -38dB to -36dB. That amount of noise narrows the radius of bird sound pickup I was hoping for, particular for the quality I was hoping to get for uploading songs and calls to eBird, but for ID'ing birds it's still pretty good. I'll post a screen recording of the self noise with audio below.
A while back I got a good lav mic, partly with an eye (ear) toward using it to supercede the AudioMoth's own mic. But I'll need to find someone who knows how to solder.