(hī'pĕr-fō'nē-ă), Excessive effort in voice production characterized by loudness and undue tension of the vocal muscles. [hyper- + G. phōnē, sound, voice]
hyperphonia
(hī″pĕr-fō′nē-ă) [″ + phone, voice] 1. Stuttering or stammering due to irritability of the vocal cords.2. Explosive speech exhibited by those who stammer.