Ambient sound level control

The invention relates to ambient sound level control. A wearable audio device may include: at least one speaker to provide an initial audio output signal; at least one sensor arranged to sense at least one characteristic of the initial audio output signal, sense noise external to the wearable audio device, and providing at least one sensor signal related to at least one characteristic of the sensed initial audio output signal and at least one characteristic of the sensed noise; at least one input arranged to accept an input related to a desired level of attenuation of noise; a processor arranged to: receive the at least one sensor signal and a selected desired attenuation level, select at least one coefficient from a table of coefficients based on the at least one sensor signal or the selected desired attenuation level, and provide an attenuation signal related to the selected at least one coefficient; and at least one filter arranged to receive the attenuated signal from the processor and to generate a filte