Patent ID: 8682011

Claim:
A method for switching a hearing device from a first operating state to a second operating state, comprising: determining a first output signal power P(x 1 ) of a first audio data stream x 1 for the first operating state; determining a second output signal power P(x 2 ) of a second audio data stream x 2 for the second operating state; defining a fading function P(y) that represents an overall target output power for an output signal y during a fading process when switching operating states the fading function P(y) having an initial value which corresponds to the first output signal power P(x 1 ) and an end value which corresponds to the second output signal power P(x 2 ); and performing the fading process by mixing the first and second audio data streams such that an overall output power of the output signal y corresponds to the overall target output power in accordance with the fading function P(y), and wherein the mixing includes calculating fading in and fading out weighting factors to effect fading in of the second audio data stream and exponentially decreasing fading out of the first audio data stream, respectively, wherein the fading out weighting factor is calculated in accordance with a corresponding approximation function that effects an exponential fading out using calculations that approximate exponential fading in lieu of using actual exponential calculations at least during part of the fading process, and wherein the fading in weighting factor is calculated in accordance with the fading function P(y).