You can use the Tools > Loudness Leveling to quickly adjust the loudness of a file to ensure compliance with loudness standards (such as the CALM Act).
For more information, see "Generating a loudness log" and "Loudness Meters."
Select the tab that contains the audio you want to level.
In the Loudness Meters tab, choose a setting from the Mode drop-down list to choose the metering mode to which you want to adjust loudness.
If the Loudness Meters are not visible, you can select the Show or hide the bottom pane button or choose View > Loudness Meters. For more information, see "Loudness Meters."
Choose Tools > Loudness Leveling.
The file is analyzed, and the loudness is adjusted to match the selected metering mode.