Why are reefers so noisy?

75795

{"replyTo":"","text":"Reefer and APUs usually don't start out being that noisy. When they get a lot of hours and the muffler rots off most of these companies wont replace them, that's where most of the noise comes from.","replyToPid":0}

690829

{"replyTo":"","text":"I love the sound of the truck engine and reefers. It puts me to sleep.","replyToPid":0}

770536

{"replyTo":"

690829 发表于 2019-08-14 15:47:52 I love the sound of the truck engine and reefers. It puts me to sleep.

","text":"I don't mind the sound of the reefer the rumble strips put me to sleep😁","replyToPid":179733}

679939

{"replyTo":"","text":"You think reefers are noisy? Wait until an owner operator's reefer is parked next to you, you would wish you had earplugs with you","replyToPid":0}

366847

{"replyTo":"","text":"To make you earn all the steady freight they offer. ","replyToPid":0}