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This trace actually represents about 2½ minutes of data, but,
for the purposes of this section, it could represent 2½ hours or 2½ seconds; the
points made would still be equally valid.
You can see that within a very short
period of time the level varies by some 15 dBA. For single, short, events
it may be acceptable to represent them by the maximum reading on the meter (Lmax);
for example, gunshots are often represented by the LAmax "Fast", also
some occupational
noise limits use Lmax "Peak" and
PPG24
represents nighttime events in terms of LAmax
"Slow".
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