background
block
blue
calm
care
cord
deaf
disturbance
ear
earplug
equipment
filter
health
hearing
industrial
isolated
job
line
loud
medical
music
muted
noise
object
orange
plastic
plug
plugs
pollution
prevention
protection
quiet
reduce
regulation
reusable
round
rubber
rubble
safety
silence
silent
soft
sound
stop
string
tool
volume
white
work
yellow