Event Logging Software - Option 831C-Ela - Larson Davis SoundAdvisor 831C Reference Manual

A.5 Event Logging Software – Option 831C-ELA
Measurement History
Time Period: Selectable from 1 minute to 99 hours 59
minutes
Synchronization: Selectable to sync to time-of-day
clock, for periods of 1, 2, 5, 10, 15, 20, 30 minutes, and
1, 24 hours
Measurements: Same measurements as Overall
measurement
Event History
Detection Methods: Level or Dynamic
Level Triggering: Events are initiated and stored when
the measured sound level exceeds the trigger levels
SPL1 and Peak 1 for the specified minimum duration
and ends when not triggered for the continuation time
Dynamic Triggering: Trigger level is offset above a
background tracking level
Trigger Levels: Selectable from 0 to 200 dB for the SPL
(L ) or Peak (Lρ )
ωƬ
peak
Dynamic Trigger Offset: Selectable from 3 to 99.9 dB
for SPL (L ) above background tracking level
ωƬ
Dynamic Trigger Response: Selectable from five
combinations of background tracking rate and tracking
percentile
Minimum Duration: Selectable from 0 to 9.9 s
Continuation Period: Selectable from 0 to 9 s
Event Time History: Selectable On or Off
• Period: Selectable for periods 20 ms, 50 ms,
100 ms, 200 ms, 500 ms, 1 s, 2 s, and 5 s
• Pre-event Samples: Selectable from 0 to 99
• Post-event Samples: Selectable from 0 to
100
• Maximum Samples: Selectable up to 9999
• Spectral Mode: Selectable On or Off,
enables Spectral Event Time History
(requires 831C-OB3)
Event Measurements:
• Date and Time of initial occurrence
• yyyy-mmm-dd hh:mm:ss
• Date and Time of maximum occurrence
• yyyy-mmm-dd hh:mm:ss
• Duration of event
• hh:mm:ss.s
Equivalent Level
Sound Exposure
Level
SoundAdvisor Model 831C
Exponent
Linear Units
ial
L L
ωeq ωƬeq
L L
ωE ωƬE
Sound Exposure
OBA Live
Equivalent Level
Spectrum
(requires 831C-
OB3)
OBA Live
Maximum Level
Spectrum
(requires 831C-
OB3)
Maximum Level
Maximum Peak
Event Time History
Equivalent Level
Event Time History
Equivalent Level 1/1
or 1/3 Spectra
(requires 831C-OB3)
dB
dB
E E
ωE
L L
ωeq(f) ωƬeq(f)
L L
ωmax(f) ωƬmax(f)
L
ωƬmax
Lρ
peak
Level
Exponent
Linear
L
ωeq
L L
ωeq(f)
Pa²s
ωƬE
dB
dB
Units
dB
dB
Units
ial
L dB
ωƬeq
dB
ωƬeq(f)
A-19