Model 831 Manual Data Display 9-7
time and calculated without regard to the criterion time.
Continuing with the example in the above paragraph, the
ProjTWA for that ten minute measurement represents the
value of TWA which would be measured if the noise
measured during the ten minute period had continued for
eight hours.
L
ep,d
The Daily Personal Noise Exposure, L
ep,d
is calculated from
data measured during the run time of the measurement.
DOSE
Dose is based on data measured during the run time
calculated for the user-defined Criterion Time and Criterion
Level (100% definition). As an example, suppose a
measurement was performed over a time period of ten
minutes. The value of Dose would be the same as the Dose
measured over an eight hour period if there had been no
other sound exposure other than that which occurred during
that ten minute period.
ProjDOSE
Projected Dose is based on data measured during the run
time and calculated without regard to the criterion time.
Continuing with the example in the above paragraph, the
Projected Dose for that ten minute measurement represents
the value of Dose which would be measured if the noise
measured during the ten minute period had continued for
eight hours.
The remainder of the display shows the parameters used for
the measurement: Frequency Weighting, Exchange Rate,
Threshold and Criterion (time and level).
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