How To Level A Freezer. Some models have screws holding the grille in place remove the screws first before pulling off. It should be perfectly level from left to right for proper operation.

If it is not level adjust one or more of the feet until it is level. This will level it out from side to side. Place a level on top of the freezer near the front.
For modern fridge freezers the typical range of noise is between 32 and 47 decibels.
Anything less than 40 dB is regarded a quiet model since this is the librarys average noise level. You may need someone to. To adjust the height of threaded leveling legs simply rotate the legs. Also check that it is level from front to back.

