Svantek SV 973, User Manual

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SVAN 973 User Manual 84
SEL8 SEL result corresponding to the integration time
equal to 8 hours. The SEL8 result is calculated on
the base of the LEQ.
Appendix D
E Exposition represents the amount of the
acoustical energy received by the worker. Appendix D
E_8h Exposition in 8 hours represents the amount of the
acoustical energy received by the worker for
8 hours. The
E_8h result is expressed in the linear
units [Pa
2
h].
Appendix D
PTC Peak Threshold Counter
– the number of the
overpasses of the Threshold Level by Lpeak
result. This result is incremented in 100 ms
intervals.
Appendix D
PTP PTC result expressed in percent. Appendix D
ULT Upper Limit Time - time that SPL exceeded the
“ULT Threshold Level” set during configuration. Appendix D
TWA Time Weighted Average - average A-weighted
sound level for a nominal 8-hour workday with
Time Weighting S and Exchange Rate 5. TWA is
usually measured with A-weighting and Slow
response detector type. TWA is calculated from
the measured LAV (taking Threshold Level into
account) and a Reference time of 8 h. Mainly used
in the USA for assessing the noise exposure for a
worker during a workday. Appendix D