hearing tests - where and how?

Good luck on finding an audiologist who tests above 8k. There is a legitimate reason for that. The profession serves a community of persons whose hearing actually causes a problem with their daily life - up to about 4k is all that is important in that respect. Not many health professionals are there to determine whether someone has an optimal response to music - would not be much business. Being able to hear voice without someone screaming is more the focus, and more what the vast majority of people are concerned with. As far as audiologist's only being in the business of selling hearing aids, what's wrong with that? Requiring, or even being on the cusp of requiring a hearing aid is a significant health and living concern. On any realistic scale, having an optimum hearing response for music is not a significant health or living concern. Regardless, if you look hard enough you can probably find someone who will be willing to test your hearing out to 50k - great for the supertweater crowd and those who hear chaos influenced electrons in cables.

In New York, one of the better places is the New York League of Hard of Hearing, now located on lower Broadway. Great for testing as they do little if any selling of aids. Went there for over fifty years.

Just use your system to play test tones in 1k increments starting out at about 10k, that will give you a real world idea of your hearing limits in your listening room. I did this recently I found I could not hear any of the tones past about 15k.

Stereophile test cd #3. Very useful!

Alas, I get the same results with this test cd as I do when I go to audiologist.

Sigh.
Art

There is at least one company that makes a CD containing test tones from 20-20,000 hertz their specifications suggest that it is reasonably accurate