I've deployed my device as part of Silent Cities project and while in testing the config I realized that electronic noise is being recorded. I'm using the requested project configuration: sampling rate = 48kHz, low Gain. I've attached a sample wav file.
I'm using regular alkaline batteries and the pack voltage seems ok to me.
All the best,
Paulo
Screenshot_1
.jpg
Download JPG • 90KB
electronic_noise_1.1.0
.wav
Download WAV • 648KB
Just to add that the same noise pattern happens with SanDisk A2 Extreme V30 U3 (the red/gold microSD) for the same config.