Svantek SV 977D User Manual

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SV 977D User Manual
• Area summary view - main STIPA view that presents summary results for the current area:
o Averaged STI (or CIS) index with consideration of the Ambient noise
distortions.
o σ - standard deviation of measured STI indexes for the tested area.
o Min –
minimal STI value.
o LAeq – averaged LAeq for the area.
o Number of measurement points taken into consideration for the
summary results calculations.
o Conformity of measurements with the standard: Yes or No.
• Point view - main STIPA view. The Point view allows you to see the modulation function, to delete
measurements (only for the last measurement point) and exclude measurement results from the calculation
of the averaged STI index. This view corresponds with the measurement point selected in the Area view.
This view presents a list of measurements for the measurement point with following results:
o Averaged STI (or CIS) index with consideration of the Ambient noise
distortions (Avg.) and STI spread (Δ) for the measurement point.
o STI (or CIS) index with consideration of the Ambient noise
distortions, the STI qualification band and error indication for
individual measurements (#1, #2 ..).
o LAeq and LCeq for the selected measurement.
• Modulation function view corresponds with the measurement selected in the Point view. Modulation function
presents LZeq and modulation transfer ratios (
m(f1), m(f2)) for seven octave bands with central frequency
from 125 Hz up to 8 kHz:
In case the modulation ratios are greater than 1 due to errors or
disruptions detected during the measurement, they are given a value of
1, and the results for this band are highlighted in red.
Note: You can switch between above views with the ▼/▲ key pressed together with <Alt>.
• Measurement view appears when you start a new measurement (manually or automatically). This view
presents measured results which are updated every second and a progress bar of the measurement that
lasts 15 seconds.
o STI index with consideration of the Ambient noise (Noise added) or
without (Measured) and the STI qualification band.
o LAeq and LAS for the current measurement time.
After completion of the measurement, the instrument will automatically switch to the Point view and the
measurement results will be placed in the measurement list. If you stop the measurement manually, the
instrument switches to the Point view, but the measurement result will not be included in the measurement
list (see Chapter
13.4.6).
Note: Averaged CIS is displayed instead of STI in the main STIPA views (Area, Area summary and
Point) when this parameter is selected as Index in the STIPA Settings screen.

Svantek SV 977D Specifications

General

Brand	Svantek
Model	SV 977D
Category	Measuring Instruments
Language	English