Svantek SV 971A, User Manual

Page: 118 / 305

SV 971A User Manual
118
LE
Sound Exposure Level (SEL), the constant sound
level that has the same amount of energy in one
second as the original noise event and is the subset
of the
Leq result so, for the integration time equal to
1 s, SEL is always equal to Leq . It is measured with
frequency weighting A, C or Z and accordingly
displayed as LAE, LCE or LZE.
Appendix D
LEPd Daily Personal Noise Exposure, the noise exposure
level for a nominal 8-hour working day, used for
assessing the noise exposure of a worker during a
working day. The
LEPd result is calculated on the
base of the Leq .
Appendix D
Ltm3
Takt-Maximal Level calculated according to the
German standard TA Lärm. Appendix D
Ltm5
Takt-Maximal Level calculated according to the
German standard TA
Lärm.
Appendix D
Ln Statistical Noise Levels, the certain boundary level
surpassed by the temporary noise level values in
not more than n% 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