Spl Meter - Vox -01 Operating Manual

SPL meter

The VOX-01 is also Sound Pressure Level meter (also known as SPL meter or SLM) that
complies with IEC 61672 Class 2 and ANSI S1.4 Type 2. In fact, the VOX-01 electronics far
exceed the requirements for a Class 2/Type 2 device.
The layout and buttons of the SPL meter app are similar to the STIPA module, featuring three
screens: SPL measurements, settings and browse measurements.
The following sound pressure level measurement settings are supported:
• Time weighting: Fast (F) and Slow (F)
• Frequency weighting: Z (linear, unweighted), A-weighted, C-weighted
• Max hold (holds and displays the maximum level during the measurement interval;
used with either Fast or Slow time weighting)
• Equivalent continuous (EQ): computes the time-integrated level over the
measurement interval; the level shown corresponds to the level of a contin -uous
signal containing the same amount of energy as the measured signal.
Peak values (PK): the highest instantaneous value within a measurement interval.
•
Once a measurement has started, each combination of the above settings is measured
simultaneously. However, not all of these combinations are displayed: only two level
measurements are displayed at the same time.
Each of these two levels is shown in its own bar graph and its own digit field. The red graph
corresponds to the red field, the blue bar graph to the blue field. You are free to select which
level to display in each of the two fields. Tap the "set" button in the level field to choose
time weighting, frequency weighting, max hold and time integration settings for the
corresponding field.
14
SPL measurements screen
VOX-01 Operating Manual