@mike @rra @anxhelo @alcinnz
I got this as a tip
"AudioMoth for cheap-ish open-source audio monitoring: https://www.openacousticdevices.info/ An important point about "decibel levels": if you want to measure noise levels, and have the measurements have ANY meaning (e.g. for use in court cases) you'll need properly calibrated expensive devices. Basic kit like AudioMoth, or Raspberry Pi, or even a Zoom recorder will NOT give any useful measure of "decibel levels".