Larson Davis SoundTrack LxT, Руководство пользователя

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LxT Manual Making Measurements 6-1
C H A P T E R
6
Making Measurements
This chapter describes how to make and store accurate
sound level measurements.
Preparation
Before making a measurement, make sure of the following:
• The instrument hardware has been properly assembled as
described in "Preparing for First Use".
• The instrument has been calibrated as described in
Chapter 7 "Calibration”.
• The measurement has been configured as described in
"Basic Measurement Setup".
Positioning the LxT
This section describes how to position the LxT for optimal
sound level measurements.
Observer Position
In order to avoid the effect of sound reflections from the
body of the operator interfering with the measurement, the
meter should be located as far as possible from the body.
Thus, when actually performing the measurement, the
operator should place himself at a distance behind the
tripod-mounted meter, or extend the hand-held meter as far
from the body as is comfortable.
Microphone Extension Cable
If desired, a microphone extension cable may be placed
between the meter and the preamplifier/microphone. No
correction is required when using Larson Davis Model
EXC<xxx> shielded microphone extension cables in
combined lengths up to 200 feet. (The variable <xxx>
represents the length in feet of the cable.)