Beware of direct mail pieces promising "free" hearing evaluations. You will be pressured into buying overpriced hearing aids by salesman posing as medical professionals ("Board Certified Audioprosthologist", etc.; about as real as a "Government Approve Unicorn Trainer"). With a computer and certificate paper, anyone can manufacture credentials now-a-days. Of course, we all overpay for things, but worse than that, you may have credit documents submitted on your behalf with forged signatures. Generally, don't trust half of what you hear.
If this is how customers (or patients) are treated, how do you think employees would be treated?