Svantek SV 973, User Manual

Page: 83 / 212

SVAN 973 User Manual
83
Ln Statistical Noise Levels, the certain boundary level
surpassed by the temporary noise level values in
not more than nn% of the observation period.
Ln
are calculated on the base of 100ms Leq results
and renewed every second on the display as
cumulated
statistics over the current
measurement time.
Appendix D
L(den) Day-evening-night equivalent level, Leq . Sound
Level, measured over the 24 hour period, with a
10 dB penalty added to the levels between 23.00
and 07.00 hours and a 5 dB penalty added to the
levels between 19.00 and 23.00 hours to reflect
people's extra sensitivity to noise during the night
and the evening. The instrument displays: Ld, Le,
Ln, Lde, Len, Lnd, or Lden depending on the day
and night time which the measurement covers.
Due to different country requirements, it is
possible to shift day time from 7h-19h to 6h-18h.
Appendix D
PSEL Individual Sound Exposure Level to the noise is
equal to the standing sound level in a
measurement period. The
PSEL result is
calculated on the base of the LEQ .
Appendix D
DOSE Quantity of noise received by the worker,
expressed as the percentage of the whole day
acceptable value. Appendix D
D_8h Quantity of noise received by the worker for
8 hours. Appendix D
PrDOSE Quantity of noise received by the worker during
exposure time. Appendix D
LAV Average level of the acoustic pressure for the
given time period of the measurement. Appendix D