SOUND PRESSURE LEVELS
(in decibels - dB)

  160  
Jet engine - close up    
  150 Snare drums played hard at 6 inches away
Trumpet peaks at 5 inches away
  140 Rock singer screaming in microphone (lips on mic)
Threshold of pain    
  130  
Pnuematic (jack) hammer   Cymbal crash
Planes on airport runway 120  
    Fender guitar amplifier, full volume at 10 inches away
Power tools 110  
Subway (not the sandwich shop) 100  
  90  
Heavy truck traffic    
  80 Typical home stereo listening level
Acoustic guitar, played with finger at 1 foot away
Average factory    
  70  
Busy street
  Small orchestra
  60 Conversational speech at 1 foot away
Average office noise 50  
Quiet conversation 40  
Quiet office 30  
Quiet living room 20  
  10 Quiet recording studio
  0 Threshold of hearing for healthy youths

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