English to Italian Tech/Engineering Wine / Oenology / Viticulture Sistemi di raffreddamento per cantine, problemi rumorosità

"For air noise use better grilles or block the noise with a solid piece of wood or Styrofoam.
Sound usually travels as a line of sight.
Sound is reduced when it turns a corner, such as, passing through a bend in ductwork.
If the unit is supported from a wall or joist, using a rubber pad under the unit will reduce vibration transmission."
Grazie a tutti per l'aiuto.