The Level position defines the threshold level of the sound source for triggering
the RT60 measurement. If the measured sound is below the Level value, the
RT60 measurement will not start. The parameter can be set in the range
24 ÷ 136 dB with 1 dB step (default value is 100 dB).
For the Impulse method, the source is Leq(1) integrated by 0,5 milliseconds.
For the Decay method, the source is Leq(1) integrated by 1 second. It also
should be stable within ±0,5 dB for 2 seconds.
12.3 CUSTOMIZING THE RT60 VIEW
The Display section contains elements for
programming measurement result
presentation and display parameters.
The Display Modes list allows you to select
the type of data displayed during the RT60
calculations.
Time data can be viewed as a Raw Data, Smoothed Data (or Integrated Data in case of the Impulse method).
You may also switch between different data view modes during measurement in the presentation mode. For this
purpose, it is necessary to select the field with Raw, Smoothed or Integrated text (at the right upper corner of
the display) and change its content with the <Alt> and â—„ / â–º key pressed together.
The Smoothing position allows you to set the number of samples, which
should be taken into consideration by the smoothing algorithm. The higher is
this number the smoother is a graph.
Note: this parameter influences the reverberation time results. The
parameter can be set in the range 0 ÷ 15 (default value is 3).
12.4 STARTING THE RT60 MEASUREMENT
Measurements using Decay method
1. Set parameters for Decay RT60 measurements. Most used setup is
presented below.
• Method: Decay
• Recording Time: 7s
• Time Step: 10ms
• Averaging: On
• Smoothing: 3
• Noise Mar.: 10.0dB
• Level: 100dB.
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