Under certain circumstances, the aryepiglottic folds take part in phonation, for instance in the singing technique of vocal growl, such as practiced by Louis Armstrong and other jazz and ethnic singers. It has been proven that the approximation of the aryepiglottic folds during vocalization may establish sustained co-oscillations, at relatively low frequencies, producing the growl or growling effect.
^Sakakibara, Ken-Ichi; Fuks, Leonardo; Imagawa, Hiroshi; Tayama, Niro (2004). "Growl Voice in Ethnic and Pop Styles". Proceedings of the International Symposium on Musical Acoustics. Retrieved 19 June 2013.