Acoustic Sound Pressure Level Chart

Civil Engineering Design & Applications

Sound pressure or acoustic pressure is the local pressure deviation from the ambient (average, or equilibrium) atmospheric pressure, caused by a sound wave. In air, sound pressure can be measured using a microphone, and in water with a hydrophone. The SI unit for sound pressure p is the pascal (symbol: Pa).

Acoustic Sound Pressure Chart

 

Examples of sound pressure in air at standard atmospheric pressure Source of sound Sound pressure* ( Pa ) Sound level ( dB SPL )

Shockwave (distorted sound waves > 1 atm ; waveform valleys are clipped at zero pressure) >101,325 >194
Theoretical limit for undistorted sound at 1  atmosphere environmental pressure 101,325 194
Stun grenades 6,000–20,000 170–180
Simple open-ended thermoacoustic device 12,619 176
.30-06 rifle being fired 1  m to shooter's side 7,265 171
Rocket launch equipment acoustic tests 4000 165
LRAD 1000Xi Long Range Acoustic Device at 1 m 893 153
Jet engine at 1 m 632 150
Threshold of pain 63.2 130
Vuvuzela horn at 1 m 20 120
Risk of instantaneous noise-induced hearing loss 20 120
Jet engine at 100 m 6.32–200 110–140
Non-electric chainsaw at 1 m 6.32 110
Jack hammer at 1 m 2 100
Traffic on a busy roadway at 10 m 0.2–0.632 80–90
Hearing damage (over long-term exposure, need not be continuous) 0.356 85
Passenger car at 10 m (2–20)×10 −2 60–80
EPA -identified maximum to protect against hearing loss and other disruptive effects from noise,
such as sleep disturbance, stress, learning detriment, etc.
6.32×10 −2 70
Handheld electric mixer   65
TV (set at home level) at 1 m 2×10 −2 60
Washing machine , dishwasher   42–53
Normal conversation at 1 m (2–20)×10 −3 40–60
Very calm room (2–6.32)×10 −4 20–30
Light leaf rustling, calm breathing 6.32×10 −5 10
Auditory threshold at 1 kHz 2×10 −5 0

*All values listed are the effective sound pressure unless otherwise stated.

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