Asymmetric temperature compensation of microphone sensitivity at an active noise reduction system

A sensitivity adjustment circuit, comprising:

• a sensitivity modification device that automatically compensates for an effect by an ambient temperature on a sensitivity of an input transducer by preventing the sensitivity from being greater than a threshold temperature sensitivity in response to a temperature deviation from a threshold temperature.

A method for operating an active noise reduction system, comprising:

• transducing, at an input transducer, acoustic noise to a noise signal, the input transducer has a first sensitivity at a threshold temperature;
• and
• compensating for an effect by an ambient temperature on a second sensitivity of the input transducer by preventing the second sensitivity from being greater than the first sensitivity in response to a temperature deviation from the threshold temperature.