Hi,

Interesting discussion this one ...

We know what the empeg is currently outputting, so the mike could subtract this from the input.

As not all cars and speaker setups are the same, there could be some sort of calibration option, where the mike measures the sound level in a "silent car" while the empeg outputs music/sound.

This will give a crude idea of what the noise level is.

Road noise seems to me to be in a certain range of frequencies. So with a FFT that range could be isolated, and the volume adjusted.

With the same method the volume could be decreased if someone speaks (which also would make it impossible to be singing in the car :)

Just some quick thoughts ...




Lars