Svantek SVAN 979 - Page 150

150
SVAN 979 User Manual
Max
For sound measurements: maximal value of the time-
weighted sound pressure level at the exponential RMS
detector output within the elapsed measurement time.
The Max result for the 1 second period is equal to the Spl
result.
For vibration measurements: maximal value of the time-
weighted vibration (acceleration, velocity or
displacement) level at the exponential RMS detector
output within the elapsed measurement time.
Appendix D
D.1.2,
D.2.2
Min
Minimal value of the time-weighted sound pressure level
at the exponential RMS detector output within the
elapsed measurement time.
Appendix D
D.1.2
Leq
Equivalent continuous sound level, time-averaged sound
level for the elapsed measurement time (equivalent
sound level).
Appendix D
D.1.2
LRm
Rolling (sliding) Leq screen for the last m minutes of
measurement (m x 60 seconds) moving with 1 second
step.
Chapter
4.1
Appendix D
D.1.2
SEL
Sound Exposure Level, 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.
Appendix D
D.1.2
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
LTeq
Takt-Maximal Level calculated according to the German
standard TA Lärm. Applied filter and detector constant
are shown also in the name of this result with two letters,
as shown on the screen (A filter and F (Fast) detector).
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
Appendix D
D.1.2