2d
acoustic
audio
barrier
block
blue
clip art
color
concept
creative
deflection
design
element
flat
gradient
graphic
icon
illustration
insulation
isolated
layer
line
line icon
linear
loud
material
noise
outline
panel
pictogram
pixel perfect
protection
reflection
room
sign
simple
sound
soundproof
soundproofing
structure
surface
symbol
technology
thin
thin line
volume
wall
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