Very loud.
I have mixed feelings about this dryer.  It does a nice job over all but has some problems.  It takes a bit for it to heat up and would take forever to actually dry wet hair. It works well on lightly damp hair.  It has a button that spins the barrel different direction and it’s quite easy to use, but the motor to turn the barrel isn’t very strong and it take a bit to get going.  My biggest complaint is the sound.  It is very loud with a high pitched wail this is especially problematic because you use it right next to your ear.
Rating: 3 stars