hearing tests - where and how?

It appears that "audiologists" are really only in the business of selling hearing aids, which are not even remotely full-range. After deciding to get tested, I found that almost no one does full range hearing tests - they don't bother to test beynd 8khz. I suspect that many readers of this forum would not consider an 8khz upper limit an adequate test. Has anyone already researched this, or found a source for a REAL hearing test? A Houston recommendation would be ideal.