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COMPARISON OF SOUND PRESSURES AND LEVELS
 
 
Sound
  Pressure 
     Sound 
Level
Outdoor Sound Levels
   (µPa) 
   (dBA) 
Indoor Sound Levels
 
6,324,555
110
Rock Band at 5m
Jet Over-Flight at 300m
105
2,000,000
100
Inside NY Subway Train
Gas Lawn Mower at 1m
95
632,456
90
Food Blender at 1m
Diesel Truck at 15m
85
Noisy Urban Area (daytime)
200,000
80
Garbage Disposal at 1m
75
Shouting at 1m
Gas Lawn Mower at 30m
63,246
70
Vacuum Cleaner at 3m
Suburban Commercial Area
65
Normal Speech at 1m
20,000
60
Quiet Urban Area (daytime)
55
Quiet Conversation at 1m
6,325
50
Dishwasher in Adjacent Room
Quiet Urban Area (nighttime)
45
2,000
40
Empty Theater or Library
Quiet Suburb (nighttime)
35
632
30
Quiet Bedroom at Night
Quiet Rural Area (nighttime)
25
Empty Concert Hall
Rustling Leaves
200
20
15
Broadcast and Recording Studios
63
10
5
Reference Pressure Level
20
0
Threshold of Hearing
 
  
 Notes:
  • µPa - MicroPascals describe pressure levels (force per unit area).
  • dBA - A-weighted decibels describe pressure logarithmically with respect to 20 µPa (reference  pressure level).