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TRG-TRC007-EN 31
period three
Acoustical Analysis
notes
When defining the acoustical design goal for an outdoor environment, to meet
a local noise ordinance for example, the A-weighted scale is typically used. This
generally takes the form of a maximum A-weighted sound-pressure level at the
lot line of the property.
More-sophisticated noise ordinances may specify maximum sound-pressure
levels for each octave band and possibly a restriction on other characteristics
of the sound. For example, a sound ordinance may define that a tone is present
when the sound-pressure level in any one-third octave band exceeds the
arithmetic average of the sound-pressure levels in the two neighboring one-
third octave bands by 5 dB or more.
Setting a Design Goal
Figure 35