Svantek SV 973 - Page 84

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