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
Just to add that the same noise pattern happens with SanDisk A2 Extreme V30 U3 (the red/gold microSD) for the same config.
It seems that the problem was described before. Sorry about that.
I'm using Sandisk A1 Extreme PRO 32GB UHS-I U3. I've realized that the beep appears only with the custom config and when inside a case or plastic bag. Pulses appear every 341 ms which is consistent with the described write interval/sample rate (16384 / 48 = 341).
Any chance to deal with this?
Paulo
Hi Paulo,
Thanks for the message and files. How are you enclosing the device and what model/speed of SD card are you using?
Thanks,
Andy