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57 Virtual meters
Meter 1/Meter 2 explained
Models SE and DL
Preparing to measure & running
This chapter explains the steps needed to prepare the SoundPro for
measuring and how to run measurements. It will also show you sample
measurement result screens and explain the contents of the screens.
Virtual meters
SoundPro SE/DL operates with two parallel measurement systems called
meters. Each meter obtains the same input from the microphone, processes the
information through the same SoundPro SE/DL circuits and displays the
measurement results in the same screens. The differences lie in the parameters
used by each meter to process the signals. You can get different measurement
results by setting the parameters for each meter differently.
Meter 1/Meter 2 explained
Meter 1 and Meter 2 enables you to setup and monitor two instruments in
one (also referred to as a “virtual instrument”). “Meter 1” is the primary
meter. “Meter 2” is the secondary meter. If a filter option is installed in the
instrument, the filtered measurements are associated with “Meter 1” only.
Setting Meter 1/Meter 2 Parameters are explained in Chapter 3. (See Figure
3-4 for a screen example.)
Measurement notation (IEC/ISO)
Many of the instrument’s measurements are labeled in accordance with nota-
tion standardized jointly by the International Electrotechnical Commission
(IEC) and the International Standards Organization (ISO). This notation iden-
tifies the measurement and the meter’s frequency and time response settings
when the measurement was obtained. Table 5-1 provides a couple
measurement examples. For additional information about measurements
and measurement parameters, see Appendix B, “Glossary.”
Notation
Explanations
LCS
SPL measured with C-weighting and slow response.
L
CSav
Average SPL with C-weighting and slow response.
LAPk
Peak SPL with A-weighting
L
CSMx
Maximum SPL with C-weighting and slow response.
L
CSMn
Minimum SPL with C-weighting and slow response.
Table 5-1: Measurement notations
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