The vocal folds, also known as vocal cords, are two bands of muscle tissue located in the larynx or voice box. They play a crucial role in producing sound when we speak or sing. When air from the lungs passes through the closed vocal folds, they vibrate, creating sound waves. The tension and length of the vocal folds can be adjusted to change the pitch of the sound produced. This adjustment is controlled by various muscles in the larynx. Healthy vocal folds are essential for clear and strong voice production, making them important for communication.