I think it's quite possible that some test equipment can be more accurate than the human ear in some specific regards. I think that on some level, it might be advantageous to be able to evaluate one set of senses with alternative ones. I think it's quite possible that the human ear might be on some level analyzing things that are either yet to be identified and labeled, or yet to have test equipment available to verify. I also think it's quite possible that some of that increased accuracy is beyond the scope of perception of the human experience and therefore superfluous on it's own. On the other hand it might be meaningful in other ways. I also think it's possible that we might not have all the test equipment yet to test all parameters that are relevant to it's intended audience. I think it's quite possible that we have yet to fully understanding as to how these different test result parameters interact for it's intended audience. I also think the intended audience, is varied and inconsistent. I think it's possible that we might be able to recognize through test equipment deficienceies in audio reproduction gear, and are challenged develop a fix. I think it's prudent to continue to use and develop new test equipment along with reference to it's intended audience; our hearing, at least for for the time being and the immediate future.