Biomedical Engineering Reference
In-Depth Information
TABLE 6-1
Sound Intensity Levels
Sound
Level (dB)
Stream flow, rustling leaves
15
Watch ticking, soft whisper
20-30
Quiet street noises
40
Normal conversation
45-60
Normal city or freeway traffic
70
Vacuum cleaner
75
Hair dryer
80
Motorcycle, electric shaver
85
Lawn mower, heavy equipment
90
Garbage truck
100
Screaming baby
115
Racing car, loud thunder, rock band
120-130
Jet airplane's takeoff from 35 m
120
Pain threshold
130
Rocket launch from 45 m
180
FIGURE 6-2
Illustrated
audiogram showing
the SPL and
frequency.
