Hello, last week-end I have installed an USB mic in the “sensor box” in front (1m) of a hive :
I am recording 59s every minutes when the light is sufficient to also take photos with the IP camera.
The initial objectif was to be able to get sound of Vespa Velutina:
Since I have discovered your projet.
The recorder is a Raspberry Pi with an extra 15G sdCard. Two days of recording fullifies it. (~10Mb/mn)
Do you only need lower frequencies to be able to further analyse the sound?
It will help to reduce file size.
The mic is not inside the hive, this is an example of record :
it seems to be noisy, I have also tried to follow your instructions to generate a map of the sound with sox :
I discover the sound analysis :-)
the audio file is now 346KB instead of 10mb, I have condensed the commands in this script:
And done on some files :
But the fail of the evening is that it should have had a short power failure, and the USB soundcard does not activate USB mode automatically at start … :(