Svantek SV 104BIS, User Manual

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175 SV 104BIS User Manual
D.2 D
EFINITIONS AND FORMULAS OF THE
SLM
FUNCTION RESULTS
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 )
L(A/C/Z)peak Peak sound level expressed in dB, for
frequency weightings A, C, Z, symbols are
LApeak , LCpeak and LZpeak . Peak sound
level is calculated for the given T .
( )






=
2
0
2
W
p
t p
max log 10 Peak
T
L(A/C/Z)(S/F/I)
max The highest time weighted sound level ( Max )
expressed in dB, within a stated time interval,
for frequency weightings A, C, Z and time
weightings F, S, I symbols are
LAFmax ,
LASmax , LCFmax , LCSmax etc.
( )






=

2
0
2
W
p
t p
max log 10 Max
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