Quick self-noise comparison of Primo EM258 (aka Lom mikroUsi) vs Primo EM172/272 (aka Clippy, aka Lom Usi).

EM258 is rated at 20dBA and EM172/272 is rated at 14dBA. The difference is noticeable indoors, but not so much outdoors in the situations I have tried so far (not super quiet).

EM258 EM172/EM272 Self-Noise Comparison

Stereo soundscape recordings. Sometime nature, sometimes people, sometimes machinery. Sometimes quiet things like a single branch creaking in the wind on Dartmoor, sometimes odd moments in the city. Mostly local, but sometimes travelling. 

EM258 EM172/EM272 Self-Noise Comparison

Douglas Langley