Premise: Dysphonia , one common form of which is referred to as hoarse voice , refers to dysfunction in the ability to produce voice . For voice to be classified as `` dysphonic '' , abnormalities must be present in one or more vocal parameters : pitch , loudness , quality , or variability . Perceptually , dysphonia can be characterised by hoarse , breathy , harsh , or rough vocal qualities , but some kind of phonation remains . While the causes of dysphonia can be divided into five basic categories , all of them result in an interruption of the ability of the vocal folds to vibrate normally during exhalation , which affects the voice .
Hypothesis: Dysphonia can be characterized by some effect on vocal quality.
Label: ENTAILMENT