“Vocal fry, or glottalization, is a low, staccato vibration during speech, produced by a slow fluttering of the vocal cords (listen here). Since the 1960s, vocal fry has been recognized as the lowest of the three vocal registers, which also include falsetto and modal—the usual speaking register. Speakers creak differently according to their gender, although whether it is more common in males or females varies among languages. In American English, anecdotal reports suggest that the behavior is much more common in women. (In British English, the pattern is the opposite.) Historically, continual use of vocal fry was classified as part of a voice disorder that was believed to lead to vocal cord damage. However, in recent years, researchers have noted occasional use of the creak in speakers with normal voice quality.”