How to reduce the difference in volume between regular broadcasts and commercials in my Philips TV?

1) Press the [Home] button on the remote control to access the [Home] menu
2) Use the cursor buttons [Up][Down][Left][Right] to select [Setup] and press the [OK] button to confirm
3) Select [TV settings] and press the [OK] button

4) Press the cursor [Down] to select [Sound] and press the [OK] button
5) Press the cursor [Down] to select [Auto volume levelling] and press the [OK] button
6) Select [On] and press the [OK] button to confirm
7) Press the [Back] button to exit the menu