Patent ID: 8442595

Claim:
A method for generating an adaptive ring signal level in a mobile communication device in response to a surrounding environmental condition of said mobile communication device, the method comprising the steps of, emitting a reference pulse signal from a loudspeaker, recording a pulse response of said emitted signal at a microphone and storing it in a memory means determining a transfer function based on the relation between the emitted signal and the recorded response, comparing said transfer function with an ideal transfer function, stored in the memory means and which has been obtained under controlled and predetermined conditions, calculating the difference between the determined transfer function and the ideal transfer function and storing it in the memory means as a response function, comparing the calculated response function with predefined response functions stored in a look up table, selecting the predefined response function that has the closest match with the calculated response function, and adjusting the ring signal to a level that corresponds to the values associated with and stored together with the selected predefined response function.