Larson Davis SoundExpert LxT, Руководство пользователя

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LxT Manual Sound Exposure Metrics Measured
16-3
Spectral data is displayed on both the Live and Overall tabs,
but only the Overall Data can be stored.
Live Tab
From the Live tab, the graphic shows the instantaneous SPL
value for all frequencies and the bar to the far right shows
the summation value for the entire frequency band. The
value corresponding to the cursor position is displayed
numerically beneath the graph.
Overall Tab
From the Overall tab, the graphic shows the energy
equivalent level calculated over the measurement time
period at each frequency band and, at the far right, for the
summation of all frequency bands. The values displayed
digitally beneath the graph represent the following data for
the frequency band at the cursor position.
• Leq
• Lmax
• Lmin
Sound Exposure Metrics Measured
The LxT measures two separate and independent sets of
sound exposure metrics.
The following parameters are user-selectable:
• Exchange Rate: 3, 4, 5 or 6 dB
• Threshold Enable: Yes or No
• Threshold Level: Numeric entry
• Criterion, Level and Hours: Numeric entries