Operation of a personal audio device during insertion detection

A personal audio device insertion detection system for detecting insertion of a personal audio device into a user's ear, comprising:

• a microphone configured to convert an ambient sound wave to a first electrical audio signal during operation of the system in a low power mode;
• a first filter configured to receive the first electrical audio signal from the microphone and produce a first modified audio signal based on first filter parameters during operation of the system in the low power mode;
• a transducer configured to convert a sensed pressure to a second electrical audio signal;
• a second filter configured to receive the second electrical audio signal from the transducer and produce a second modified audio signal based on second filter parameters during operation of the system in an ultra-low power mode;
• and
• a control circuit configured to determine whether either of the first and second modified audio signals exceeds a respectively corresponding signal level threshold and to generate an insertion detection signal responsive to either of the first and second modified audio signals exceeding the respectively corresponding signal level.

A system for detecting insertion of a personal audio device into a user's ear, comprising:

• a speaker driver configured to generate an input signal based on a sensed pressure during operation of the system in an ultra-low power mode;
• a first filter configured to receive the input signal from the speaker driver and produce a first modified audio signal based on first filter parameters during operation of the system in the ultra-low power mode;
• a microphone configured to generate a second input signal based on a sensed pressure during operation of the system in a low power mode;
• a second filter configured to receive the second signal from the microphone and produce a second modified audio signal based on second filter parameters during operation of the system in the low power mode;
• and
• a control component configured to create an insertion detection signal responsive to either of the first and second modified audio signals exceeding a respectively corresponding signal level threshold.