hearing tests - where and how?

Learsfool wrote:

Also, research has proven that the brain can indeed perceive frequencies above those that the ear can hear, which is fascinating.

Actually, only one lab has promoted that and none of their findings have been replicated by any other lab.

Kal

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]

Learsfool wrote: "Kal, not sure where you got that ...."

From many years as a neuroscientist who studies and lectures on the topic. When there is reliable, confirmed and replicated evidence, let me know.

Kal

This is in response to Learsfool: I am not trying to be contentious but presenting what I know. Most posters on audio forums refer to the work of Oohashi and associates and it is about their work I was commenting.

What I do not know is what you believe is scientifically reliable evidence of "hearing" significantly beyond 20KHz and would appreciate a reference or two.

Kal

BTW, I believe that Oohashi's first studies were funded by Pioneer. This goes way back.

Kal

Learsfool wrote:
Sounds to me like the question is very much unanswered. Just because modern technology cannot measure whether we can hear above 20K does not mean that we cannot.

First, the technology we have is more than capable but why would you presume that we can hear supersonic frequencies? All the substantial data indicates otherwise. For example, competent electrophysiology demonstrates that auditory nerve fibers respond to frequencies up to approximately 20KHz in healthy young adults but not higher and the technology is capable of resolving whether there are responses to higher frequencies. So, if any such information is not getting in via the auditory nerves, then (1) one must posit that any higher frequency input must be coming in from a non-auditory pathway and (2) one must, consequently, question its role in auditory perception.

I don't think it is an unimportant subject, despite the fact we can't prove it anytime soon.

Sure, it may be important around here but, frankly, we do have all the technology needed for this but it has not captured the interest of the best scientists in the field.

Kal