Soundadvisor Model 831C Time History Software - Option 831C-Log - Larson Davis SoundAdvisor 831C Reference Manual

Equivalent Level
Sound Exposure
Level
Sound Exposure
OBA Live
Equivalent Level
Spectrum
(requires 831C-
OB3)
L
OBA Live
Maximum Level
Spectrum
(requires 831C-
OB3)
A.6 SoundAdvisor Model 831C Time History Software –
Option 831C-LOG
Time-History Measurement System
The Time History can log an abundant selection of
acoustic and non-acoustic metrics at equal time
intervals.
Time Period: Selectable for periods 2.5 ms, 5 ms,
10 ms, 20 ms, 50 ms, 100 ms, 200 ms, 500 ms, 1 s, 2
s, 5 s, 10 s, 15 s, 20 s, 30 s, 1 min, 2 min, 5 min, 10
min, 15 min, 20 min, 30 min, 1 h, and 24 h
Synchronization: Selectable to sync to time-of-
day clock, for periods of 1, 2, 5, 10, 15, 20, 30
seconds; 1, 2, 5, 10, 15, 20, 30 minutes; and 1, 24
hours
Acoustic Measurements
Metrics are individually selectable.
Period < 20 ms:
• OBA 1/1 Leq*
• OBA 1/3 Leq*
Period ≥ 20ms:L
Aeq
L
Zpeak
Period ≥ 100 ms:
• L , L , L
Aeq Ceq Zeq
• L , L , L , L
AS AF AI CS
• L , L
ASmax AFmax
L , L , L
CImax ZSmax
• L , L , L
ASmin AFmin
L , L , L
ZSmin ZFmin
• L -L , L
Ceq Aeq AIeq
With option 831-IH: L
SoundAdvisor Model 831C
Exponent
Linear Units
ial
L L
ωeq ωƬeq
L L
ωE ωƬE
E E Pa2s
ωE ωƬE
L L
ωeq(f) ωƬeq(f)
L
ωmax(f) ωƬmax(f)
, L , L , L , L
Ceq Zeq APeak
, L , L , L
Apeak Cpeak Zpeak
, L , L , L , L , L
CF CI ZS ZF ZI
, L , L , L
AImax CSmax
, L
ZFmax ZImax
, L , L
AImin CSmin CFmin
ZImin
-L L
aeq, AFTtm5
, L
twa1 twa2
Maximum Level
dB
Maximum Peak
dB
dB
Event Time History
Equivalent Level
Event Time History
dB
Equivalent Level 1/1
or 1/3 Spectra
(requires 831C-OB3)
Non-Acoustic Measurements
Metrics are individually selectable.
Millisecond Resolution, Period < 1 s: Tms
Period ≥ 100 ms: Battery Voltage, External Power,
Internal Temperature
426A12
Temperature, Internal Humidity
SEN031 Metrics: Windspeed; Wind Gust Speed;
Wind Direction; Temperature: Avg, Min & Max;
Humidity: Avg, Min & Max; Barometric Pressure
SEN032 Metrics: Windspeed; Wind Gust Speed;
Wind Direction
*OBA processing must be available by option 831C-
OB3 and enabled by OBA Bandwidth setting.
,
Cpeak
,
CFmax
, L ,
CImin
L
ωƬmax
Lρ
peak
Level
Exponent
Linear
L
ωeq
L L
ωeq(f)
or PRM2103 Metrics:
Units
dB
dB
Units
ial
L dB
ωƬeq
dB
ωƬeq(f)
Internal
A-15