Sound Insulation
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Sound Insulation |
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The apparent sound reduction index R' and the standardized difference of DnT levels define the insulation capacity of an on site compartment.
The calculation is carried out by comparing the source and receiving room average sound spectra (after considering background noise effects). The receiving room average reverberation time (will give the DnT index) or equivalent absorption area (will give the R' index) can be used as calculation correction factor.
Average values are obtained from the average of a series of measurements taken at various points of the two rooms.
Procedure
Perform the reverberation time measurements
Perform the average reverberation time and the equivalent absorption area calculation
Perform the measurements of single average spectra in average mode
Download the measurement data files into a PC folder.
Click on the Start Analysis button (or select the menu item Analyze -> SOUND INSULATION -> Start).
In the window that opens, select the Sound Insulation Index (DnT -R') measurement and click OK to confirm.
You should create a new project containing all files concerning the processing or open an existing one.
Create the project "Rp_DnT_index".
The program will ask if you wish to use the single element method, valid when considering only a wall, or the global method, valid when considering more walls.
If you use the global method, you first need to assess the single walls insulation using the single element method.
Save the results and then apply the global method.
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