Sound Insulation

Global method

This method allows calculation of the standardized difference of DnT levels or the apparent sound reduction index R' for multiple walls.

First you need to calculate the standardized difference of DnT levels or the apparent sound reduction index R' for each single wall using the single element method and saving the results on file.

Now you can start a new analysis clicking on the Start Analysis button (or selecting 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.

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 "Globale_Rp_DnT_index".

Then select the global method

This opens the global method insulation parameters calculation window

By pressing Add you can select the files that will give the standardized difference of DnT levels or the apparent sound reduction index R' previously calculated using the single element method.

Choose the file in the CDRom "Noise Studio - Sample files" (D:\Esempi\IsolamentoAcustico\Globale_Rp_DnT_index\DnT prima parete.RpD") and press Open.

The software will add the file and calculate the average according to the formula

where:
n is the number of source places
Di is the acoustic insulation for every source-receiver pair.

If you have only one file, the average and the input file values will match

Choose a second file in the CDRom "Noise Studio - Sample files" (D:\Esempi\IsolamentoAcustico\Globale_Rp_DnT_index\DnT seconda parete.RpD" and press Open

You will get the following result

You can see the insulation of the two walls, and the average insulation value and its evaluation index on the first line.

Now, from the menu item "File -> Save as..." you can save the result.

The result is saved in this example file in the CDRom "Noise Studio - Sample files" (D:\Esempi\IsolamentoAcustico\Globale_Rp_DnT_index\Isolamento sonoro DnT GLOBALE.RpD.

Pressing the Details key, the same index as a function of frequency is shown,

and a comparison table of the just calculated index and the law requirements for different types of unit environments.

By selecting the "Analyze -> SOUND INSULATION -> Create Report" menu item, you can generate an ISO report into an Excel spreadsheet.