HEADSET POWER SOURCE MANAGING

A power management system for a noise reducing headset comprising: external receiving circuitry for receiving power from one of a plurality of external power sources; internal receiving circuitry for receiving power form an internal battery; electing circuitry for exclusively electing to receive electrical power from one of the circuitry for receiving power form the external power source or the internal battery; gain controlling circuitry, responsive to the electing circuitry for controlling a gain of active noise reduction circuitry; wherein the gain controlling circuitry causes the gain to be higher if the electing circuitry elects to receive power from the internal battery than if the electing circuitry elects to receive power from the external source.