Active noise cancellation in an ear-wearable device using a vibration sensor

An ear-wearable device comprising:

• a receiver that reproduces sound into an ear canal;
• an inward-facing microphone determining sound pressure resulting from:
• the sound reproduced by the receiver into the ear canal;
• and acoustical noise leaking into the ear canal;
• a structural vibration sensor structurally coupled to detect at least one of body-induced vibrations and receiver-induced vibrations and produce a sensed vibration signal in response;
• and
• a sound processor operatively coupled to the receiver, the inward-facing microphone, and the structural vibration sensor, the sound processor operable to perform:
• determining an error signal from the inward-facing microphone;
• calculating an active noise cancellation (ANC) signal based on the error signal;
• subtracting the sensed vibration signal from the ANC signal to form a modified ANC signal;
• and
• reproducing the modified ANC signal via the receiver into the ear canal.