NTi Audio RT60 QUICK GUIDE
HOW TO...
Measure Reverberation Time RT60
via an existing PA-System
QUICK GUIDE
This document provides a practical guide on how to use professional instruments to measure Reverberation Time RT60 in venues with existing Public Address systems used for evacuation and life
safety as well as general public announcements.
What you need:
• XL2 Audio and Acoustic Analyzer
• M4261 Measurement Microphone
• Minirator MR-PRO Signal Generator
• XLR Cable
Exel System Case with XL2 Audio and
Akustic Analyzer and Minirator MR-PRO
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4Oct 20 Page 1
QUICK GUIDEHow to measure Reverberation Time RT60
How to measure Reverberation Time RT60
Reverberation is one of the main acoustic characteristics of a room and influences speech intelligibility.
Connect the MR-PRO to a line
input of your system.
Measure with the XL2 in a
6 to 12 meter grid.
SETUP
On the MR-PRO, select GENERATOR from the main menu, click on WAV and select PNOISE, click
on MOD and select , then click on CYC and select 3/3s. *
On the XL2, select RT60 from the main menu, Run from the second menu, and 1/1 OCT resolution.
When the room is quiet, click SET.
This records the noise floor and sets the Level Markers
35dB above the noise floor in each frequency band.
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* If the RT60 values you measure are greater than the cycle time, increase the cycle time.
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