Page 49 - Master Handbook of Acoustics
P. 49
FIGURE 2-1 This graph shows the relationship between sound pressure in pascals or pounds/square
inch and sound-pressure level (referred to 20 μPa). This is a graphical approach to the solution of
Eq. (2-2).
When a statement is encountered such as, “The sound-pressure level is 82 dB,” the 82-dB sound-
pressure level is normally used in direct comparison with other levels. However, if the sound
pressure were needed, it can be computed readily by working backward from Eq. (2-4) as follows:
x
x
4.1
The y button on a calculator helps us evaluate 10 . Enter 10, enter 4.1, press the y power button,
and the value 12,589 appears.
