In 1998, Benjamin and Gannon researched the audibility of jitter using listening tests. Auditory hallucinations have two essential components&colon; audibility and alienation. The best thresholds of audibility table has been provided by . Some individuals may find the provided amplification also increases the audibility of their pitch discrepancy. Like the trophy prey they hunt, Margot's expressiveness is cast by her audibility and visuality. All classrooms are equipped with microphones and speakers for better audibility. This will increase the audibility of sounds downwind. A single THD number is inadequate to specify audibility, and must be interpreted with care. Usage of these requires carrying an additional amplispeaker to enable audibility to the performer.