blowing sound front engine

hi guys.
when i get into 5th gear and accelerate, there is a blowing noise coming from the engine. this is only when i am in 5th gear. any suggestion on what this blowing could be ???

thanks :)
 
same sound as an exhaust when that has blown, a deep sound. lol prob is the hamster runnin out off steam or the old person who previously had the car lol
 
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