CPC H04R 29/001 (2013.01) [H04R 2400/01 (2013.01); H04R 2460/03 (2013.01)] | 20 Claims |
1. On-ear transition detection circuitry, comprising:
a monitoring unit operable to monitor a speaker current flowing through a speaker and to generate a monitor signal indicative of the speaker current; and
an event detector operable to detect a qualifying disturbance in a sensor signal indicative of a qualifying pressure change incident on the speaker caused by the speaker transitioning from an on-ear state to an off-ear state or vice versa, wherein the sensor signal is, or is derived from, the monitor signal;
wherein for each qualifying pressure change, the corresponding qualifying disturbance is a step response in the time domain or ringing in the time domain in the sensor signal.
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