Generating an audio signal from multiple microphones based on a wet microphone condition

A non-transitory computer readable storage medium storing instructions for generating an output audio signal in an audio capture device having multiple microphones including at least a first reference microphone capturing a first audio signal, a second reference microphone capturing a second audio signal, and a drainage microphone capturing a third audio signal, the drainage microphone adjacent to a drainage channel for draining liquid away from the drainage microphone, the instructions when executed by a processor cause the processor to perform steps including:

• determining if each of the first reference microphone and the second microphone are wet or dry;
• responsive to determining that both the first reference microphone and the second reference microphone are wet, selecting the third audio signal from the drainage microphone, and generating a first mono audio output signal corresponding to the first time period from the third audio signal;
• responsive to determining that both the first reference microphone and the second reference microphone are dry, selecting the first audio signal from the first reference microphone and selecting the second audio signal from the second reference microphone, generating a stereo audio output signal corresponding to the second time period by processing the first and second audio signals;
• responsive to determining that the first reference microphone is dry and the second reference microphone is wet, selecting the first audio signal from the first reference microphone, and generating a second mono audio output signal corresponding to the third time period from the first audio signal;
• and
• responsive to determining that the second reference microphone is dry and the first reference microphone is wet, selecting the second audio signal from the second reference microphone, and generating a third mono output audio signal corresponding to the fourth time period from the second audio signal.

An audio capture device comprising:

• a first reference microphone capturing a first audio signal;
• a second reference microphone capturing a second audio signal;
• a drainage microphone capturing a third audio signal;
• a drainage channel adjacent to the drainage microphone for draining liquid away from the drainage microphone;
• a processor;
• and
• a non-transitory computer readable storage medium storing instructions for generating an output audio signal in an audio capture device having multiple microphones the instructions when executed by a processor cause the processor to perform steps including:
• determining if each of the first reference microphone and the second microphone are wet or dry;
• responsive to determining that both the first reference microphone and the second reference microphone are wet, selecting the third audio signal from the drainage microphone, and generating a first mono audio output signal corresponding to the first time period from the third audio signal;
• responsive to determining that both the first reference microphone and the second reference microphone are dry, selecting the first audio signal from the first reference microphone and selecting the second audio signal from the second reference microphone, generating a stereo audio output signal corresponding to the second time period by processing the first and second audio signals;
• responsive to determining that the first reference microphone is dry and the second reference microphone is wet, selecting the first audio signal from the first reference microphone, and generating a second mono audio output signal corresponding to the third time period from the first audio signal;
• and
• responsive to determining that the second reference microphone is dry and the first reference microphone is wet, selecting the second audio signal from the second reference microphone, and generating a third mono output audio signal corresponding to the fourth time period from the second audio signal.