AUTOMATICALLY DETERMINING A WET MICROPHONE CONDITION IN A SPORTS CAMERA

摘要

An audio capture system for a sports camera includes at least one “enhanced” microphone and at least one “reference” microphone. The enhanced microphone includes a drainage enhancement feature to enable water to drain from the microphone more quickly than the reference microphone. A microphone selection controller selects between the microphones based on a microphone selection algorithm to enable high quality in conditions where the sports camera transitions in and out of water during activities such as surfing, water skiing, swimming, or other wet environments.

主权项

1. A method for determining if a first microphone is wet in a camera system having a first microphone and a second microphone, which the first microphone is positioned in a recess of an inner side of a face of the camera, the recess coupled to a channel coupled to a lower drain below the channel to drain water from the recess away from the microphone via the channel, and wherein the second microphone is positioned away from the channel and the drain, the method comprising:
determining an first average signal level of the first audio signal and a second average signal level of the second audio signal over a predefined time interval; determining a ratio of the first average signal level to the second average signal level; responsive to the ratio of the first average signal level to the second average signal level exceeding a first threshold or detecting a wind condition, determining, by a processor, that a wet microphone condition is not detected; responsive to the ratio of the first average signal level to the second average signal level not exceeding the first threshold and not detecting the wind condition, determining, by the processor, that the wet microphone condition is detected.