Seamless listen-through for a wearable device

A method of audio signal processing, the method comprising:

• receiving a plurality of external microphone signals that includes audio sound from outside of the device, the audio sound of the plurality of external microphone signals including a self-voice component and a background component;
• based on at least information from an internal microphone signal, separating the self-voice component of the audio sound of the plurality of external microphone signals from the background component of the audio sound of the plurality of external microphone signals;
• performing a first listen-through operation on the separated self-voice component of the audio sound of the plurality of external microphone signals to produce a first listen-through signal that is based on the separated self-voice component of the audio sound of the plurality of external microphone signals;
• and
• producing an output audio signal that is based on at least the first listen-through signal that is based on the separated self-voice component of the audio sound of the plurality of external microphone signals,
• wherein the output audio signal includes an audio zoom signal that includes audio sound of the plurality of external microphone signals.

A wearable device, the wearable device comprising:

• a memory configured to store a plurality of external microphone signals that includes audio sound from outside of the device, the audio sound of the plurality of external microphone signals including a self-voice component and a background component;
• and
• a processor configured to retrieve the plurality of external microphone signals that includes audio sound from outside of the device from the memory and to:
• separate, based on at least information from an internal microphone signal, the self-voice component of the audio sound of the plurality of external microphone signals from the background component of the audio sound of the plurality of external microphone signals;
• perform a first listen-through operation on the separated self-voice component of the audio sound of the plurality of external microphone signals to produce a first listen-through signal that is based on the separated self-voice component of the audio sound of the plurality of external microphone signals;
• and
• produce an output audio signal that is based on at least the first listen-through signal that is based on the separated self-voice component of the audio sound of the plurality of external microphone signals,
• wherein the output audio signal includes a signal that is based on the separated background component of the audio sound of the plurality of external microphone signals.

A method of audio signal processing, the method comprising:

• receiving a plurality of external microphone signals that includes audio sound from outside of the device, the audio sound of the plurality of external microphone signals including a self-voice component and a background component;
• based on at least information from an internal microphone signal, separating the self-voice component of the audio sound of the plurality of external microphone signals from the background component of the audio sound of the plurality of external microphone signals;
• performing a first listen-through operation on the separated self-voice component of the audio sound of the plurality of external microphone signals to produce a first listen-through signal that is based on the separated self-voice component of the audio sound of the plurality of external microphone signals;
• and
• producing an output audio signal that is based on at least the first listen-through signal that is based on the separated self-voice component of the audio sound of the plurality of external microphone signals,
• wherein the output audio signal includes a signal that is based on the separated background component of the audio sound of the plurality of external microphone signals.