This publication describes techniques for intelligent microphone muting of a device. The device first determines that an active application is using a microphone of the device and that a microphone input to the application is able to be muted (e.g., a microphone mute function for an audio/video call). An output from the microphone is then monitored for an audio signal that matches an audio signature, the audio signature corresponding to an initiation of a hand of a user covering a lower portion of the device. When a matching audio signal is determined, a touch sensor is powered and an output from the touch sensor is monitored for a touch signal that matches a touch signature, the touch signature corresponding to the hand covering the lower portion of the device. When a matching touch signal is determined, the microphone input to the application is muted. Responsive to the matching touch signal no longer being detected, the microphone input to the application is unmuted.
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Lee, Yun Sun; Murugan, Kavinaath; Kandibanda, Aaditya; and Brantingham, Luke, "Intelligent Microphone Muting of a Device", Technical Disclosure Commons, (June 29, 2020)