A method of controlling a speech recognition process of a computing device, comprising: receiving audio signals from a microphone; receiving head muscle activity signals from a muscle movement detector configured and positioned to measure head muscle activity of a user of the computing device contemporaneously with receiving audio signals from the microphone; determining whether the audio signals satisfy an audio characteristic criterion indicative of the user of the computing device speaking, wherein the audio characteristic criterion comprises a first threshold level indicative of a user giving audio commands to the computing device; determining whether the head muscle activity signals satisfy a muscle movement criterion indicative of the user of the computing device speaking; processing the audio signals through a voice recognition algorithm in response to determining both that the audio signals satisfy an audio characteristic criterion indicative of the user of the computing device speaking and that the head muscle activity signals satisfy a muscle movement criterion indicative of the user of the computing device speaking; and not processing the audio signals through the voice recognition algorithm while either the audio signals do not satisfy an audio characteristic criterion indicative of the user of the computing device speaking or the head muscle activity signals do not satisfy a muscle movement criterion indicative of the user of the computing device speaking, characterized in that the first threshold level indicative of the user giving audio commands to the computing device is a first Root Mean Square threshold level; the audio signals satisfy the audio characteristic criterion when an RMS level of the audio signals does not exceed the first RMS threshold level; and the audio signals do not satisfy the audio characteristic criterion when the RMS level of the audio signals exceeds the first RMS threshold level. receiving audio signals from a microphone; receiving head muscle activity signals from a muscle movement detector configured and positioned to measure head muscle activity of a user of the computing device contemporaneously with receiving audio signals from the microphone; determining whether the audio signals satisfy an audio characteristic criterion indicative of the user of the computing device speaking, wherein the audio characteristic criterion comprises a first threshold level indicative of a user giving audio commands to the computing device; determining whether the head muscle activity signals satisfy a muscle movement criterion indicative of the user of the computing device speaking; processing the audio signals through a voice recognition algorithm in response to determining both that the audio signals satisfy an audio characteristic criterion indicative of the user of the computing device speaking and that the head muscle activity signals satisfy a muscle movement criterion indicative of the user of the computing device speaking; and not processing the audio signals through the voice recognition algorithm while either the audio signals do not satisfy an audio characteristic criterion indicative of the user of the computing device speaking or the head muscle activity signals do not satisfy a muscle movement criterion indicative of the user of the computing device speaking, characterized in that the first threshold level indicative of the user giving audio commands to the computing device is a first Root Mean Square threshold level; the audio signals satisfy the audio characteristic criterion when an RMS level of the audio signals does not exceed the first RMS threshold level; and the audio signals do not satisfy the audio characteristic criterion when the RMS level of the audio signals exceeds the first RMS threshold level.