I am planning on using several Audio Moths to determine if there is a presence of ultrasonic noise in several classrooms on my campus. Along with this, I will be taking room mean square measurements of the sound waves in order to determine typical sound pressure levels in these environments. I need the sensitivity of the audio moths in order to do this, but cannot seem to find this value.
I am interested to see if anyone knows more about this, or can possibly point me in the right direction - thanks in advance!
Hi, The sensitivity of the MEMS microphones used on AudioMoth are quoted in the data sheets but you will need to calibrate your devices with a known source with a decibel meter to be able to work from the values that are written to the SD card :
AudioMoth 1.0.0 and 1.1.0 use the SPM0408LE5H - datasheet here.
AudioMoth 1.2.0 uses the SPU0410LR5H - datasheet here.