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I have some Miracles on order at the moment, so I can't (yet) add to the discussion from direct experience, however, I did find the following interesting:
Some have questioned how the Miracles can sound neutral and balanced, given that their frequency response chart appears rather uneven:
(http://www.compudio.ca/2010/08/unique-melody-miracle-new-benchmark.html)
If one looks at the following curve depicting human hearing sensitivity:
(http://blogs.msdn.com/blogfiles/audiofool/WindowsLiveWriter/LouderSoundsBetter_12855/FletcherMunson_EqualLoudness2.jpg)
...it's intriguing, if one inverts the Miracles' response chart and juxtaposes it with the above curves (adjusting the scale proportions to match):
or flipped the other way up, whichever way you prefer to compare them:
Whilst I certainly don't claim there is a direct correlation, there are nonetheless some striking similarities.
However, in spite of the similarities observed when inverting one chart against the other, unless I'm reading the human hearing chart incorrectly, the response of the Miracles (and that of many other BA IEMs) appears at odds with what would be an ideal compensatory frequency response, rather than coherent with such an ideal. Shouldn't the charts closely resemble one another without one being inverted? By this, I mean that the chart appears to state that human hearing becomes less sensitive at the frequency extremes - and loudpseakers and headphones/IEMs tend to roll off at the frequency extremes. ...Or perhaps I'm just tired (it's just past 4 am as I type this!). If the frequency response of transducers really is at odds with the frequency sensitivities of human hearing, then, even allowing for the complexities of human psychoacoustics, it seems strange that people should perceive the Miracles, UEMS, or whatever, as being so 'neutral'.
For reference, this is a screenshot of one of Ultimate Ears' CIEM 'Golden Curves' (I'm not certain which model it refers to):
http://www.youtube.com/watch?v=UPpHBFsvmlg
Of course, these are just frequency curves, and it is subjective sound quality which ultimately matters the most - something I hope to be able to comment upon once I receive my own pair of Miracles. I'm not optimistic that that'll happen this side of Christmas, though, since UM must be inundated with orders at the moment, what with their global promotions.
Some have questioned how the Miracles can sound neutral and balanced, given that their frequency response chart appears rather uneven:
(http://www.compudio.ca/2010/08/unique-melody-miracle-new-benchmark.html)
If one looks at the following curve depicting human hearing sensitivity:
(http://blogs.msdn.com/blogfiles/audiofool/WindowsLiveWriter/LouderSoundsBetter_12855/FletcherMunson_EqualLoudness2.jpg)
...it's intriguing, if one inverts the Miracles' response chart and juxtaposes it with the above curves (adjusting the scale proportions to match):
or flipped the other way up, whichever way you prefer to compare them:
Whilst I certainly don't claim there is a direct correlation, there are nonetheless some striking similarities.
However, in spite of the similarities observed when inverting one chart against the other, unless I'm reading the human hearing chart incorrectly, the response of the Miracles (and that of many other BA IEMs) appears at odds with what would be an ideal compensatory frequency response, rather than coherent with such an ideal. Shouldn't the charts closely resemble one another without one being inverted? By this, I mean that the chart appears to state that human hearing becomes less sensitive at the frequency extremes - and loudpseakers and headphones/IEMs tend to roll off at the frequency extremes. ...Or perhaps I'm just tired (it's just past 4 am as I type this!). If the frequency response of transducers really is at odds with the frequency sensitivities of human hearing, then, even allowing for the complexities of human psychoacoustics, it seems strange that people should perceive the Miracles, UEMS, or whatever, as being so 'neutral'.
For reference, this is a screenshot of one of Ultimate Ears' CIEM 'Golden Curves' (I'm not certain which model it refers to):
http://www.youtube.com/watch?v=UPpHBFsvmlg
Of course, these are just frequency curves, and it is subjective sound quality which ultimately matters the most - something I hope to be able to comment upon once I receive my own pair of Miracles. I'm not optimistic that that'll happen this side of Christmas, though, since UM must be inundated with orders at the moment, what with their global promotions.