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C H A P T E R
9
Parameters Logged
Acoustical Parameters
Parameter Label
Leq
Lmax & Lmin
Lpeak
LwS, LwF, & Lwl
LAFTM5
Ltwa1 & Ltwa2
LCeq - LAeq
LAleq - LAeq
Table 9-1:Logged Broadband Level Parameters for Time History
LxT Manual
Time History
This chapter describes the measurement features
associated with the optional data logging firmware LXT-
LOG and LXT-HSLOG.
With the optional firmware LXT-LOG enabled, the Time
History mode permits the LxT to automatically log up to
twenty parameters, both acoustic and non-acoustic, at time
intervals ranging from 1 second to twenty-four hours.
With the optional firmware LXT-HSLOG also enabled, the
time interval for automatic logging is extended to 100
milliseconds.
Table 9-1 shows the acoustical broadband level parameters
that are logged for Time History.
Uses selected frequency weighting: A, C, or Z
Uses selected frequency weighting: A, C, or Z and selected
detector: F, S, or I
Uses selected Peak Weighting: A, C, or Z
Instantaneous level: w = selected frequency weighting
Taktmaximal 5
The weighted averages associated with Dose 1 and Dose 2
C-A for low frequency indication
Impulse - rms for indication of impulsivity.
Time History
Description
9-1
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