Does anyone know what causes these strange interferences in the recordings?
Hi Juan, What hardware version is this? The vertical bands every 0.33 seconds are the SD card write noise and the wavering line is internal noise in the microphone. This is temperature dependent so will vary a bit over time. The redesign in AudioMoth 1.2 reduced both sources of noise significantly. The noise is often worse as the battery voltage drops, but it's really a trade-off in the design through having all the components (microphone, oscillators and SD card) on the same single-sided PCB. Alex
It's 1.1.0. I have changed the batteries and the interferences have gone.
Thank you very much.
Or I thoguht so...
As you say, maybe it depends on the temperature, because it goes up or down and sometimes it's out of the range.
It goes up and down depending on the day and the hour.