How Do I Stop My Dog From Barking at the Vaccum?

I have a 4 year old sheltie and she’s usually very well behaved. However since she was a pup any time I try to vaccum or blow my hair dry, she barks uncontrollably and attacks. Once when I was blowing my hair dry she went to attack the dryer and got me instead, not bad- as soon as she realized she got me she stopped, but how can I get her to relax or stop barking at these two object?? Please help! Thanks!