Hi experts,
I need a circuit to measure engine noise. At the moment I have a electret mic and some simple analogue filtering to give me the frequency range but I then have to do a lot of processing on the microcontroller.
I've seen LM3915 type ICs that give 10 outputs over a range of dBs, is there a simple way or other ICs that can give me better resolution.
I'm using the mic to monitor if the engine in running and need an output that gives a range of about 1000 steps resolution.
Thanks in advance
Mark.