mogiphonia

mog·i·pho·ni·a

(moj'i-fō'nē-ă),
Laryngeal spasm occurring in public speakers as a result of overuse of the voice.
[G. mogis, with difficulty, + phōnē, voice]

mogiphonia

(mōj-ĭ-fō′nē-ă) [″ + phone, voice]
Difficulty in emitting vocal sounds.