hearing tests - where and how?

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

AudioCD works well but it does require a very quiet environment in order to get reliable thresholds. Here is a link to my experiences with it.
[url]http://stereophile.com/reference/100digital/[/url]

I visited a high end store some time ago, and although my hearing is perfect acording to a recent test; they demonstrated that I could not hear above 18K. This was done with the use of a frequency generator, a speaker and a decibel meter. All frequencies were generated at a loud level. When they got past 16K, the apparent volume began to rapidly diminish. After they got past 18K, all was silent. Unfortunately that's not the end of the story.
Somehow, I can distinguish in the music between tweeters that go beyond audibility and those that don't. A hearing test does not take "Harmonics" into account.

Very good point, Orpheus. Also, research has proven that the brain can indeed perceive frequencies above those that the ear can hear, which is fascinating. Don't tell that to designers of digital processors, though, the vast majority of whom (at least as of a couple of years ago, anyway) still remove these frequencies as a matter of course, claiming that we don't miss them.