US 2020/0051542 A1 · PRESSURE ADAPTIVE ACTIVE NOISE CANCELLING HEADPHONE SYSTEM AND METHOD

Abstract

Aspects are generally directed to headphone systems that adjust Active Noise Reduction operations based on measurements of environmental conditions. In one example, a headphone system includes an earpiece having an interior volume, the earpiece configured to couple to an ear and define an acoustic volume including the interior volume and a volume within the ear, a speaker to provide acoustic energy to the acoustic volume based on a received driver signal, a feedback microphone to detect at least residual noise within the acoustic volume and generate a feedback audio signal indicative of the residual noise, and a control circuit including a sensor interface configured to receive an atmospheric pressure signal, the control circuit coupled to the feedback microphone to receive the feedback audio signal, and the control circuit configured to adjust the driver signal based at least in part on the feedback audio signal and the atmospheric pressure signal.

Claims20

Dependent claims

An aviation headphone system comprising:

an earpiece including a speaker;
at least one feed-forward microphone coupled to the earpiece and configured for use in generating a feed-forward audio signal, such that a feed-forward filter applied to the feed-forward audio signal provides a feed-forward compensating signal that compensates for external noise;
at least one feedback microphone coupled to the earpiece and configured for use in generating a feedback audio signal, such that a feedback filter applied to the feedback audio signal provides a feedback compensating signal that compensates for residual noise, and the feed-forward and feedback compensating signals can be used to generate a noise-corrected driver signal to be output by the speaker;
an oxygen sensor configured to provide an oxygen signal based on a measured oxygen level;
and
a control circuit in communication with the oxygen sensor, the control circuit configured to
compare at least one of i) the oxygen signal, ii) an average oxygen signal based on the oxygen signal, or iii) a rate of change of the oxygen signal to an alarm threshold, and
in response to exceeding the alarm threshold, generate an alert or alarm.

5 more elements

Dependencies are inferred from the claim text.

Pressure adaptive active noise cancelling headphone system and method

Life of this patent

Pressure adaptive active noise cancelling headphone system and method

Life of this patent

Abstract

Claims20