Casella CEL CEL-63X - Manual (Page 54)

CEL-63x Environmental & Occupational Noise Meter
54 Casella CEL
period and produce an average level that assumes the highest level was
present for the entire 3 or 5 second period.
Statistical values
The statistical functions L
10
, L
50
, L
90
and L
95
show the sound
pressure levels that are exceeded for 10 %, 50 %, 90 % and 95 %
of the measurement period respectively. For example, the
measurement L
10
is the level exceeded for 10 % of the
measurement time and L
90
is the level exceeded for 90 % of the
measurement time.
The CEL-63x instrument also provides a user-defined, variable statistical
measurement.