Refers to the flaccid, flapping sound that occurs when more than the normal amount of air is passed between vocal folds at least one of which is flaccid by virtue of a vocal fold paralysis or functional (non-organic) flaccidity of the folds. A breathy, diplophonic, unstable kind of vibration occurs that is characteristic of this laryngeal state. Luffing may not be heard if the individual is speaking very softly. It may often be elicited by asking the patient to phonate loudly. Luffing is a quality easy to identify, once heard and defined for the uninitiated clinician.
Posted in Glossary.