Signal Processor with side-tone noise reduction for a headset

A signal processor for a headset configured with a microphone terminal for receiving a microphone signal, a loudspeaker terminal for outputting a loudspeaker signal, and a far-end terminal for communicating an inbound signal and an outbound signal with a far-end;

• comprising:
• an outbound path from the microphone terminal to the far-end terminal;
• a side-tone path configured to generate a side-tone signal from the microphone signal via a side-tone filter,
• an inbound path from the far-end terminal to the loudspeaker terminal and comprising a combiner configured to combine the side-tone signal and the inbound signal to generate the loudspeaker signal;
• and
• a side-tone filter controller that receives the microphone signal and computes a first noise estimate with a signal-to-noise level of the microphone signal at respective frequency bands and based thereon controls the side-tone filter to improve a signal-to-noise ratio of the side-tone signal;
• wherein the side-tone filter in the side-tone path comprises multiple filter stages that are individually controlled based on the first noise estimate;
• and
• wherein the multiple filter stages are configured from a group consisting of:
• multiple peak filters and a high-shelf filter.