The human voice consists of soun made by a human being using the vocal folds for talking, singing, laughing, crying, screaming, etc. Human voice is specifically that part of human sound production in which the vocal folds (vocal cords) are the primary noise source. Generally speaking, the voice can be subdivided into three parts; the lungs, the vocal folds, and the articulators. The lung (the pump) must produce adequate airflow to vibrate vocal folds (air is the fuel of the voice). The vocal folds (vocal cords) are the vibrators, neuromuscular units that ‘fine tune’ pitch and tone. The articulators (vocal tract consisting of tongue, palate, cheek, lips, etc.) articulate and filter the sound.