alto
baritone
bass
contrabass
contralto
deep
double bass
inclined
throaty
low
anguished
atonal
audible
breathy
conspiratorial
deep-throated
drawn-out
ear-piercing
faraway
high-pitched
husky
inarticulate
low-frequency
sibilant
strident
tinny
toneless
tuneless
wheezy
whispery
high