Spectrogram comparison, cheap lav mics, AGPTEK vs PoP

[CGKYoung]

hi all,

my first post here, what a great project and community.

I have setup at birdnet-pi station (https://app.birdweather.com/stations/1871) and I'm planning for a second one.

I've got 2 different lav mics to test - AGPTEK and PoP Voice - and they yield slightly different results (see spectrograms). Test setup is a 3B+ running a UGREEN sound card.

Seems that the PoP lav has lower "noise" in <2khz zone than the AGPTEK, but is a lot "stripier".

Any thoughts on comparative performance of those two mics?

Cheers

Charles