adenoidal
altissimo
alto
countertenor
falsetto
inclined
nasal
peaky
pinched
screaky
screechy
sharp
shrill
sopranino
soprano
spiky
squeaking
squeaky
squealing
tenor
treble
high
steep
steeply pitched
anguished
audible
eerie
husky
insistent
long-drawn
loud
melodious
monotonous
plaintive
rasp
strident
throaty
tremulous
wordless
low
low-pitched