Svantek SVAN 958A - Page 293

293
SVAN 958A User Manual
PEAK
Peak sound level is calculated for
the given T
( )








=
2
0
2
W
p
tp
maxlog10PEAK
T
MAX
Maximal value of the time-
weighted sound pressure level for
current time period of the
measurement (T). The MAX result
for the 1 second period is equal to
the value of the Spl result
( )








=

2
0
2
W
p
tp
maxlog10MAX
T
MIN
Minimal value of the time-weighted
sound pressure level for current time
period of the measurement (T)
( )








=

2
0
2
W
p
tp
minlog10MIN
T
SPL
Maximal value of the frequency
and time-weighted sound pressure
level for the last second of the
measurement
( )








=

2
0
2
W
1
p
tp
maxlog10SPL
T
LEQ
Time-averaged sound level for
current time period of the
measurement (T)
( )
( )








=

T
0
2
0
dtptr
T
1
log10LEQ
SEL
Sound Exposure Level is
essentially the subset of the LEQ
result. Its value is equal to the LEQ
result referred to the integration
time equal to one second (so, for
the Integration time equal to 1 s,
SEL is always equal to LEQ)
( )
( )
s1
T
log10LEQdtptrlog10SEL
T
0
2
0
+=








=

Ltm3 and
Ltm5
The Ltm3 and Ltm5 results (Takt-Maximal Levels) are calculated according to the German
standard TA Lärm.
LN%
Statistical level is the certain
boundary level surpassed by the
temporary noise level values in not
more than n% of the observation
period
Example: Let us assume that L35 is equal to
76.8 dB. It means that during the measurements the
noise level 76.8 dB was exceeded in not more than
35% of the observation period.
L(den)
Only one result from: Ld, Le, Ln, Lde, Len, Lnd, and Lden is available in the instrument. It
depends on the day and night time in which the measurement was performed. Day and night
time depend on the <Day Time Limits> option (6h-18h or 7h-19h).