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SVAN 971 User Manual
– Appendixes
214
L
T
Threshold sound level set in the
Threshold Level
parameter. The available values are as
follows:
None
,
60dB
up to
90dB
in 5 dB steps.
L
C
Criterion sound level set in the
Criterion Level
parameter. The available values are form
60dB
, up to
90dB
in 5 dB steps.
L(t)
Sound level (a function of time) measured
with the selected time constant (
IMPULSE
,
FAST
or
SLOW
) and the weighting filter
(equal to
A
,
C
or
Z
)
0
W
p
t
p
log
20
t
L
L
d
(t)
Sound level (a function of time) depends on the selected threshold level.
In case
None
option is selected
t
L
t
L
d
In other cases (when
Threshold Level
is
not set to none and equal to
60 dB
… or up
to
90 dB
)
T
T
d
L
t
L
L
t
L
t
L
t
L
for
for
D.2
D
EFINITIONS AND FORMULAS OF THE
SLM
RESULT
The instrument calculates the sound measurement results for three profiles. The calculation flow diagram for one
profile is presented below:
OVL
Percentage of the overloaded input signal, which occurred during the current time period of
the measurement (
T
)
p
2
wτ
(t)
τ
= Fast
τ
= Slow
τ =
Imp
p
w
(t)
p(t)
p
2
w
(t)
L
peak
L
max,
L
min, L,
L
tm3,
L
tm5
L
eq,
LE,
LEPd,
SEL,
L(den),
LEPd,
LR15,
LR60
p
w
(t)
all
DOSE
results
Содержание SVAN 971
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Страница 169: ...SVAN 971 User Manual Appendixes 169 2 0 kHz 1 1 octave filter 1 0 kHz 1 1 octave filter 500 Hz 1 1 octave filter ...
Страница 170: ...SVAN 971 User Manual Appendixes 170 250 Hz 1 1 octave filter 125 Hz 1 1 octave filter 63 0 Hz 1 1 octave filter ...
Страница 177: ...SVAN 971 User Manual Appendixes 177 B filter Class 1 according to the IEC 651 B filter characteristics ...
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