In most cases, it is due to the ventilation. Ventilation duct can be cleaned or changed.
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Depending on your vehicle the "squirrel cage blower" may need the bearing/bushing lubricated or replaced, on some vehicles this is easy and some others very difficult. I have included (link below) of a typical blower.
roar really loud noise
your engine is loud because, the fan makes that noise
An elephant
The Tai-me
Cymbals make loud noise.
well if it makes a pop noise get rid of it fast
Fruit bats.
The startle reflex.
· An electric bulb has partial vacuum. When broken, air rushes into the void causing a loud noise.
I'm pretty sure it makes this noise because it is warmimg up. When the hot air it is creating, hits the cold air that is already in your house, it makes a noise that sort of sound like a loud boom. I really hope this helped! ;) ;) =) =D ;P :P =P
makes a loud noise!! ha
The Tai-me.