Svantek SVAN 977A - Page 122

122
SVAN 977A User Manual
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
D.1.2
Ltm3
Takt-Maximal Level calculated according to the German
standard TA Lärm.
Appendix D
D.1.2
LTeq
Takt-Maximal Level calculated according to the German
standard TA Lärm.
Appendix D
D.1.2
Lnn
Statistical Noise Levels, the certain boundary level
surpassed by the temporary noise level values in not
more than nn% of the observation period. Lnn 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
D.1.2, D.4
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
D.1.2
EX
Expected value. Calculated on the basis of 100ms RMS
results.
Appendix D
D.1.2
SD
Standard deviation. Calculated on the basis of 100ms
RMS results.
Appendix D
D.1.2
NR
Noise Rating, measured noise level that takes into
account the frequency content of the noise.
NR is calculated if 1/1 Octave function is active.
Appendix D
D.1.2
NC
Noise Criterion, measured noise level that takes into
account the frequency content of the noise.
NC is calculated if 1/1 Octave function is active.
Appendix D
D.1.2