Vocal fry register

The vocal fry register^[a] is the lowest vocal register and is produced through a loose glottal closure that permits air to bubble through slowly with a popping or rattling sound of a very low frequency.^[1] During this phonation, the arytenoid cartilages in the larynx are drawn together, which causes the vocal folds to compress rather tightly and become relatively slack and compact. This process forms a large and irregularly vibrating mass within the vocal folds that produces the characteristic low popping or rattling sound when air passes through the glottal closure. The register (if well controlled) can extend far below the modal voice register, in some cases up to 8 octaves lower, such as in the case of Tim Storms who holds the world record for lowest frequency note ever produced by a human, a G₋₇, which is only 0.189 Hz, inaudible to the human ear.

Vocal fry is thought to have become more common among young female speakers of American English in the 21st century, with the style of speaking being considered informal, nonaggressive and urban-oriented.

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