You must have observed the inside of the movie house, what measures were taken to reduce the noise there Appear?
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The noise chart below lists average decibel levels for everyday sounds around you.
Painful impulse noise—Not safe for any period of time
150 dBP = fireworks at 3 feet, firecracker, shotgun
140 dBP = firearms
Painful steady noise—Not safe for any period of time
130 dBA = jackhammer
120 dBA = jet plane takeoff, siren, pneumatic drill
Extremely loud—Dangerous to hearing; wear earplugs or earmuffs
112 dBA = maximum output of some MP3 players, rock concert, chainsaw
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