1. A system for processing detected audio waveforms in a first mode and a second mode, comprising: a microphone configured for detecting audio waveforms; a gesture detection sensor configured to detect touchless gestures; a system clock configured to provide a time stamp for audio waveforms detected by the microphone and touchless gestures detected by the gesture detection sensor; one or more processors configured to selectively process an audio waveform detected by the microphone in the second mode when a time stamp of the detected audio waveform and a time stamp of a touchless gesture detected by the gesture detection sensor approximately match.