Dynamic on ear headset detection

A method for on ear detection for a headset, the method comprising:

• receiving respective microphone signals from a plurality of microphones;
• deriving from the microphone signals a plurality of signal feature measures;
• normalising the signal feature measures by applying a non-linear mapping of each signal feature measure to a unitless reference scale;
• variably weighting the signal feature measures in response to detected signal conditions in the microphone signals;
• and
• combining the variably weighted normalized signal feature measures to produce an output indication of whether a headset is on ear.

A non-transitory computer readable medium for on ear detection for a headset, comprising instructions which, when executed by one or more processors, causes performance of the following:

• receiving respective microphone signals from a plurality of microphones;
• deriving from the microphone signals a plurality of signal feature measures;
• normalising the signal feature measures by applying a non-linear mapping of each signal feature measure to a unitless reference scale;
• variably weighting the signal feature measures in response to detected environmental conditions in the microphone signals;
• and
• combining the variably weighted normalized signal feature measures to produce an output indication of whether a headset is on ear.

A system for on ear detection for a headset, the system comprising a processor and a memory, the memory containing instructions executable by the processor and wherein the system is operative to:

• receive respective microphone signals from a plurality of microphones;
• derive from the microphone signals a plurality of signal feature measures;
• normalise the signal feature measures by applying a non-linear mapping of each signal feature measure to a unitless reference scale;
• variably weight the signal feature measures in response to detected signal conditions in the microphone signals;
• and
• combine the variably weighted normalized signal feature measures to produce an output indication of whether a headset is on ear.

A signal processing device for on ear detection for a headset, the device comprising:

• a plurality of inputs for receiving respective microphone signals from a plurality of microphones;
• and
• a processor configured to derive from the microphone signals a plurality of signal feature measures, the processor further configured to normalise the signal feature measures;
• the processor further configured to variably weight the signal feature measures in response to detected signal conditions in the microphone signals;
• the processor further configured to combine the variably weighted normalised signal feature measures to produce an output indication of whether a headset is on ear, wherein the processor is configured to select a weighting to be applied to the signal feature measures based on the detected signal conditions in the microphone signals.

A signal processing device for on ear detection for a headset, the device comprising:

• a plurality of inputs for receiving respective microphone signals from a plurality of microphones;
• a processor configured to derive from the microphone signals a plurality of signal feature measures, the processor further configured to normalise the signal feature measures;
• the processor further configured to variably weight the signal feature measures in response to detected signal conditions in the microphone signals;
• the processor further configured to combine the variably weighted normalised signal feature measures to produce an output indication of whether a headset is on ear;
• and
• a memory storage storing predefined signal feature weightings to be applied to the signal features measures, each predefined signal feature weighting corresponding to a respective detected signal condition.

A signal processing device for on ear detection for a headset, the device comprising:

• a plurality of inputs for receiving respective microphone signals from a plurality of microphones;
• a processor configured to derive from the microphone signals a plurality of signal feature measures, the processor further configured to normalise the signal feature measures;
• the processor further configured to variably weight the signal feature measures in response to detected signal conditions in the microphone signals;
• the processor further configured to combine the variably weighted normalised signal feature measures to produce an output indication of whether a headset is on ear;
• and
• a linear combiner for multiplying the signal feature measures by respective variable weights.