Evolutionarily the voice is one of our most precious assets for communication and, in times of need, protection. We whisper, laugh, cry, sing, gasp, shout and scream in relation to the needs of the moment. As a singer, teacher or performer we use our voice to communicate each day and yet at times, our voice can fail us, particularly when the stakes are high, or when we’re so frightened or overwhelmed we literally cannot speak.