aphasia aphonia artificial voice broken speech broken tones broken voice childish treble choked voice cracked voice croak crow dysarthria dyslalia dyslogia dysphonia dysphrasia echolalia falsetto harshness hawking voice hiss hoarseness hysterical aphonia idioglossia idiolalia impairment of speech imperfect speech incoherence lisp lisping loss of voice mutism muzzy speech nasal tone nasalization psychophonasthenia quaver shake sibilation speech defect speech impediment tremor twang verbigeration