Patent ID: 8630427

Claim:
A telecommunications terminal including: an input audio transducer, a receiver for receiving an electrical signal representing a transmitted audio signal, a noise energy estimator for estimating an audio noise energy input received by the input audio transducer, an audio enhancer for applying to the received electrical signal in a selected audio frequency band in the range of from about 2 kHz to about 3 kHz a first gain which is greater than a second gain applied to audio frequencies of the received electrical signal outside the selected band, and a processor operable to calculate, for each of a given plurality of audio frames of the audio noise energy input preceding a current audio frame, a value of RMS noise energy estimated by the noise energy estimator, to select a minimum value of RMS noise energy out of the calculated values of RMS noise energy, and to calculate a gain factor, to be applied to the current audio frame of the transmitted audio signal by the audio enhancer in the selected audio frequency band as a function of the selected minimum value of RMS noise energy.