Airliner takeoffs....in my office?!

We've recently acquired a new piece of technology in our office. It allows us to better detect ocular anomalies without any invasive procedures.

It'll be here on a year tril before we decide on wheter or not to keep it. It has some pros and cons but one unexpected pro:
Everytime we start it on a patient, it sounds like a plane taking off, though nowhere as loud.

Its unreal. And its not that I am biased either. I've heard a dozen patients say, in passing, "sounds like an airplane."
Sounds like takeofss all day long here.