Originally Posted by Chef
It's difficult to know what you mean by standards. Standards of who? Head-Fi? Corporations? HydrogenAudio? Please clarify.
Therein lies the problem. There are some accepted standards regarding a surround sound sound system, as to where to place your speakers. There are standards by which we use to measure a loudspeakers frequency response ( using free field microphones in an anechoic chamber) and a determination as o what that response should be shaped like in order to achieve what we consider "accurate" sound.
When talking about headphone reproduction we have no designated or defined response or transfer function that has been determined to be "accurate" in the reproduction of the original signal.
When many of the standards groups for ITU, IEC, CEDIA or AES gather they will often work on methods to use the accumulated knowledge and wisdom of many audio industry experts to create some sort of metric that can be utilized by the industry and consumers to give some feedback as to the level of performance that a particular product has.
I don't believe thus far, that the industry has come up with a protocol that really quantifies the accuracy or performance of headphones to date. I realize that there is much debate concerning which attributes are the most important when defining this metric. Although even the most basic measure of say a frequency response curve (what should the curve look like?) has yet to be determined.
Now, I understand of course that many have collected frequency response of many headphones using a head and torso system or the GRAS. But when you look at those measurements can you say, given two headphone measurements of two different headphones, which one is more accurate as far as timbre response?
This is why I am seeking input from those who have spent much time listening too and evaluating headphones such as yourself. I would greatly appreciate any thoughts regarding the measure and quality of current headphones and what you believe is the beth method of achieving that.