Svantek SV 104BIS, Руководство пользователя

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174
SV 104BIS User Manual
q Value of q is used in the calculations of
DOSE , D_8h and LAV is taken from the
formula




=

=
3 Q 10
3 Q
2 log
Q
q
for
for
L
T
Threshold sound level set in the Threshold Level via the SUPERVISOR software. 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 set via the SUPERVISOR software. The
available values are from 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 the None option is selected
( ) ( )
t L t L
d
=
In other cases (when the Threshold Level
set via the SUPERVISOR software 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