The extended use of optic fibers and TV cameras and videos make easier the stroboscopic exploration of the vocal folds. The ENT surgeons must stress the use of this unique method which allows us the study of the laryngeal voice function. This exploration is based on a fictional slow motion movement of the vocal fold that lets us see the mucosal wave. The most useful clinical implications of the laryngeal stroboscopic study are: phonatory function, differential diagnosis between benign and malignant lesions and laryngeal paresis.