Source of sound |
RMS sound pressure |
sound pressure level |
Pa |
dB re 20 µPa |
Theoretical limit for undistorted sound at
1 atmosphere environmental pressure |
101,325 |
191 |
1883 Krakatoa eruption |
|
approx 180 at 100 miles |
Stun grenades |
|
170-180 |
rocket launch equipment acoustic tests |
|
approx. 165 |
threshold of pain |
100 |
134 |
hearing damage during short-term effect |
20 |
approx. 120 |
jet engine, 100 m distant |
6–200 |
110–140 |
jackhammer, 1 m distant / nightclub |
2 |
approx. 100 |
hearing damage from long-term exposure |
0.6 |
approx. 85 |
traffic noise on major road, 10 m distant |
0.2–0.6 |
80–90 |
moving car, 10 m distant |
0.02–0.2 |
60–80 |
TV set – typical home level, 1 m distant |
0.02 |
approx. 60 |
normal talking, 1 m distant |
0.002–0.02 |
40–60 |
very calm room |
0.0002–0.0006 |
20–30 |
quiet rustling leaves, calm human breathing |
0.00006 |
10 |
auditory threshold at 2 kHz – undamaged human ears |
0.00002 |
0 |