www.peacehealth.org , a local healthcare provider charges $275 for an audiology exam. They do not provide any hearing devices, so it is a neutral opinion.
Costco, MiracleEar, and others will give you an audio test for free, but they hope to sell you some gear. One local guy sets an RV in the Safeway parking lot, with a big sign “FREE HEARING TEST”. I have used him 4 times for quick checks over the years.
In the RV you cant expect much in the way of sound isolation, can you? At the peacehealth office, they are a full clinical setting, and I would expect the precision and professionalism of that setting. They way I see it, the range is NOTHING to $275.
As for me, I did 5 different free ones, once I decided to get some aids. BUT, I compared all of them closely, and ‘averaged’ them and compared the differences. The one I use as my ‘official’, is the one that was an average of all of them. Some showed worse, some showed better.