Systems and methods for on ear detection of headsets

A method of on ear detection for an earbud, the method comprising:

• receiving a first microphone signal from a first microphone and a first microphone signal from a second microphone where the first microphone signals are generated while no audio is being played via a speaker configured to be positioned within the earbud, wherein the first microphone is configured to be positioned within an ear of a user when the earbud is being worn and the second microphone is configured to be positioned outside the ear of the user when the earbud is being worn;
• comparing the first microphone signals to determine an on ear status of the earbud, wherein the earbud is determined to be on ear if a parameter of the first microphone signal from the first microphone is lower than a parameter of the first microphone signal from the second microphone by a predetermined threshold;
• and
• determining that the on ear status of the earbud cannot be sufficiently determined, generating a signal for acoustic playback from the speaker, receiving a second microphone signal from the first microphone, and comparing the second microphone signal to the generated signal to determine the on ear status of the earbud.

A signal processing device for on ear detection of an earbud, the device comprising:

• a first microphone input for receiving a microphone signal from a first microphone, the first microphone being configured to be positioned within an ear of a user when the earbud is being worn;
• a second microphone input for receiving a microphone signal from a second microphone, the second microphone being configured to be positioned outside the ear of the user when the earbud is being worn;
• a signal generator configured to generate a signal for acoustic playback from a speaker configured to be positioned within the earbud;
• and
• a processor configured to:
• generate the signal for acoustic playback from the speaker;
• cause the signal to be played by the speaker;
• receive at least one microphone signal from each of the first microphone input and the second microphone input, and compare the received microphone signals with the generated signal played by the speaker to detect resonance of the generated signal;
• determine whether resonance is detected in the received microphone signals by comparing the received microphone signals with the generated signal played by the speaker, wherein resonance is determined to be detected when the resonance gain of the received microphone signals over the generated signal exceeds a predetermined threshold;
• and
• determine an on ear status of the earbud;
• wherein the earbud is determined to be on ear only if the resonance is detected in the signal from the first microphone input but is not detected in the signal from the second microphone input.

A method for on ear detection of an earbud, the method comprising:

• generating a signal for acoustic playback from a speaker configured to be positioned within the earbud;
• causing the signal to be played by the speaker;
• receiving at least one microphone signal from a first microphone and a second microphone, wherein the first microphone is configured to be positioned within an ear of a user when the earbud is being worn and the second microphone is configured to be positioned outside the ear of the user when the earbud is being worn;
• comparing the received microphone signals with the generated signal played by the speaker to detect resonance of the generated signal, wherein resonance is determined to be detected when the resonance gain of the received microphone signals over the generated signal exceeds a predetermined threshold;
• and
• determining an on ear status of the earbud, wherein the earbud is determined to be on ear only if the resonance is detected in the signal from the first microphone input but is not detected in the signal from the second microphone input.