Anisotropic background audio signal control

A method comprising:

• obtaining, from a first microphone on a headset, a first audio signal including a user audio signal and an anisotropic background audio signal;
• obtaining, from a second microphone on the headset, a second audio signal including the user audio signal and the anisotropic background audio signal;
• extracting, from the first audio signal and the second audio signal, using a first adaptive filter, a reference audio signal including the anisotropic background audio signal;
• based on the reference audio signal, cancelling, using a second adaptive filter, the anisotropic background audio signal from a third audio signal derived from the first and second audio signals to produce an output audio signal;
• and
• providing the output audio signal to a receiver device.

One or more non-transitory computer readable storage media encoded with instructions that, when executed by a processor, cause the processor to:

• obtain, from a first microphone on a headset, a first audio signal including a user audio signal and an anisotropic background audio signal;
• obtain, from a second microphone on the headset, a second audio signal including the user audio signal and the anisotropic background audio signal;
• extract, from the first audio signal and the second audio signal, using a first adaptive filter, a reference audio signal including the anisotropic background audio signal;
• based on the reference audio signal, cancel, using a second adaptive filter, the anisotropic background audio signal from a third audio signal derived from the first and second audio signals to produce an output audio signal;
• and
• provide the output audio signal to a receiver device.