NTi Audio XL2 Sound Level Meter - Manual (Page 77)

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Reverberation Time RT60
4 Measurement Status STAT
Displays the actual measurement status. Start and stop the
reverberation time measurement with start/stop
. The
following status information is displayed:
ARMED Measurement is waiting for the test signal
to exceed at least one measurement trigger
marker, then the measurement is triggered
automatically.
NOISE A sound stimulus signal above the trigger
marker is being received.
DECAY Decay is being measured.
PAUSE The measurement has been paused by press-
ing pause
.
STOP No RT60 measurement is presently being per-
formed.
5 Average AVRG
Counts the measurement cycles. When using a gated
noise test signal, a minimum of 3 sequential cycles is rec-
ommended.
6 Actual Real-Time Spectrum
The black bars indicate the actual signal, including back-
ground noise. While setting up the reverberation time mea-
surement you should increase the test signal level until the
black bars exceed the grey bars completely and the status
4 displays NOISE.
7 Level Marker
The grey bars indicate the signal level required for effective
reverberation time measurements in each octave band.
The marker has a length of 35 dB, and can be set by
Selecting • SET 1 with the rotary wheel .
Press enter • to measure the environmental noise in
the silent room.
8 Band Status
Indicates a successful reverberation time measurement
above each octave band with a tick .
9 Measurement Resolution
Reverberation time measurement selectable in 1/3 oc-
tave or 1/1 octave band resolution. The optional Extended
Acoustic Pack enables 1/3 octave band resolution from
50 Hz to 10 kHz.