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Insulation
- sound
proofing to doors, walls and
ceilings to decrease the
level of noise in office to
prevent excessive
disturbance
- insulator
usually employed in theatre
and cinemas are curtain to
avoid the formation of echo
during theatrical
performance
- using
of ear piece for protection
of workers in industrial
working areas
- construction
of sound barrier separating
urban housing and nearby
highway to reduce the noise
level produced from heavy
traffic vehicles
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