Austin Healthmate Can You Tell Me About The Austin Air HealthMate Air Purifier?

Can you tell me about the Austin Air HealthMate air purifier? - austin healthmate

I am in my two Air Purifier Austin Air HealthMate interested in - for my house, and one for my class. At $ 450 each, not a small investment. They seem quality units - but what about sound? Would it be too difficult to teach or speak? Thank you!