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
disability
disablement
handicap
impairment