A refrigerator or freezer ambient hum.
Large walk-in freezer room tone or drone.
A heavy duty freezer or fridge in a kitchen restaurant.
Freezer Lid Open and Close x3, Squeaky - No compressor
Whirring and cracking sound of the inside of a freezer
Refrigeration units door opening at start and closing at the end
Freezer or refrigerator door open with rattle of contents