People, Development and Environment
9.45
increase represents a tenfold increase in sound inten-
sity. For example, 70 dB is ten times more intense
than 60 dB. An increase from 40 to 80 dB signifies a
10,000-fold rise in loudness.
•
Threshold of Hearing:
The threshold of hearing is
the quietest sound that the average human ear can
detect, typically around 0 dB. Sounds below this level
are considered inaudible. 0 decibel represents the
threshold of hearing, correlating to an intensity of 1
× 10
–12
Watts/m².
•
Threshold of Pain:
On the other end of the scale,
the threshold of pain for most people is around 120-
130 dB. Exposure ...
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