Self-voice feedback in communications headsets

摘要

Techniques for providing self-voice feedback in a communications headset include processing signals carrying near-end speech in parallel digital and analog signal processing paths to produce a combined gain-adjusted near-end signal carrying the near-end speech for output to transducers of the communications device.

主权项

1. A communications device comprising:
a first ear cup and a second ear cup; a first output transducer that is acoustically coupled to an acoustic volume defined by a volume of air within a first ear canal of a wearer of the communications device and a volume of air within the first ear cup; a second output transducer that is acoustically coupled to an acoustic volume defined by a volume of air within a second ear canal of the wearer and a volume of air within the second ear cup; a first microphone to provide a first signal having a voice component that represents a response of the first microphone to near-end speech; a second microphone to provide a second signal having a voice component that represents a response of the second microphone to the near-end speech; first signal processing circuitry, electrically coupled to the first and the second microphones, being configured to:
determine, from at least the first signal and the second signal, parameter values including a microphone mixing parameter value and a gain adjustment parameter value;process the first signal and the second signal according to at least the determined microphone mixing parameter value to produce a gain-adjusted outbound signal carrying the near-end speech for output from the communications device; andproduce a first control signal having a value corresponding to the microphone mixing parameter value and a second control signal having a value corresponding to the gain adjustment parameter value; andsecond signal processing circuitry, electrically coupled to the first and the second output transducers and the first and the second microphones, being configured to:
process the first signal and the second signal according to the determined parameter values to produce a combined gain-adjusted near-end signal carrying the near-end speech for output to the first and the second output transducers by:
receiving the first control signal and the second control signal from the first signal processing circuitry;mixing the first equalized signal and the second signal according to the first control signal to produce a combined near-end signal; andadjusting a gain of the combined near-end signal according to the second control signal to produce the combined gain-adjusted near-end signal;wherein the second signal processing circuitry comprises low-latency circuitry and the combined gain-adjusted near-end signal comprises a self-voice feedback signal.