Active noise cancellation for wearable head device

A system comprising:

• a wearable head device comprising a fan, a microphone, and a speaker;
• and
• one or more processors configured to perform a method comprising:
• operating the fan;
• detecting, with the microphone, noise generated by the fan;
• generating a fan reference signal;
• deriving a transfer function based on the fan reference signal and based further on the detected noise of the fan;
• generating a compensation signal based on the transfer function;
• and
• while operating the fan of the wearable head device, outputting, by the speaker, an anti-noise signal, wherein the anti-noise signal is based on the compensation signal.

A non-transitory computer-readable medium storing instructions that, when executed by one or more processors, cause the one or more processors to perform a method comprising:

• operating a fan of a wearable head device;
• detecting, with a microphone of the wearable head device, noise generated by the fan;
• generating a fan reference signal;
• deriving a transfer function based on the fan reference signal and based further on the detected noise of the fan;
• generating a compensation signal based on the transfer function;
• and
• while operating the fan of the wearable head device, outputting, by a speaker of the wearable head device, an anti-noise signal, wherein the anti-noise signal is based on the compensation signal.