acoustic tile
antiknock
antlia
apply to
baffle
baffler
beak
beezer
bill
black out
blanket
blindfold
block
bugle
bundle up
canopy
censor
choke
choke off
cloak
clothe
cloud
conceal
conk
cope
cover
cover up
covert
cowl
curtain
cushion
damp
dampen
dampener
damper
deaden
deafen
dull
dumbfound
eclipse
enfold
enshroud
envelop
film
gag
hap
hood
hugger-mugger
conquer
curb
inhibit
kiln
soften
stamp down
subdue
suppress
muffled
muffles
muffling
audible
faint
frantic
hoarse
husky
inaudible
incessant
indistinct
insistent
loud
metallic
ominous
plaintive
rhythmic
thunderous
duffel
kerfuffle
reshuffle
ruffle
scuffle
shuffle
truffle