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AES 2012 paper: "Relationship between Perception and Measurement of Headphone Sound Quality" - Page 9

post #121 of 130

Vocals will carry both melody and the usual semantic content that goes with language - which of those you prefer emphasized in your music in subtle ways can to my mind be a similar question of preference as whether you like your bass boosted or not - if indeed more subtle. Though I can also see that the mind has been made up in this thread by and large that all headphones should be neutral (won't happen, this would put most manufacturers out of business, would it not). I for sure prefer neutrality as well, but not to the point of dictating it quite so harshly.


Having said that, the floor is still likewise open for discussion on the effects of this left/right divide on the study presented in the Harman paper, a study in which this variable was not controlled for apparently. Would people have a preference to hear vocals primarily in either the left or the right ear? I'll also note that the S & W article I've been referring to was published in The Lancet; I'm sure they put more than a cursory thought into it.

Edited by vid - 7/16/13 at 4:59am
post #122 of 130
What I mean is: you can't boost the melody so the left ear hears it better, or whatever you were thinking could be done. Ab Initio explains he facts of the matter very well. The only thing I would change about what he wrote is "perfectly flat" to "perceived Flat relative to a calibrated stereo" which is sort of what this thread is about(or was rather). We still don't know that curve after making headphones for decades. Of course calibrated stereos haven't been around as long, but B&K were able to derive a preference curve that's similar to todays a long ti e ago. We got derailed on to brain lateralization and how it effects what we hear--which is a great topic BTW. It's just the wrong thread for it.
post #123 of 130

It's exactly the right thread for it since the issue has the potential to affect the results in the Harman study. Or do you have an argument against that?


As far as "boosting" the melody, I don't think we're on the same page. The way I understand it anyway is that it's a question of whether the melody or the grammar is processed, given priority in processing, or whatever. You don't need to extract the melody and then feed it into the ear.

post #124 of 130
There are a million things that have potential to effect the Harman study.... I actually completely understand your second paragraph and it's part of the reason that I think brain lateralization is for a different thread.

If you look at the HP1, the most preferred headphone SQwise in the first Harman paper, it measures most similar to the dtmblabber calibrated room measured curve. https://dl.dropboxusercontent.com/u/16343460/Relationship%20between%20Perception%20and%20Measurement%20of%20Headphone%20Sound%20Quality.key.pdf
The Mad Dog measures very similarly to the HP1 when you look here: http://dtmblabber.blogspot.com/search?updated-max=2013-07-14T18:11:00-07:00&max-results=1
The Mad Dog is known to measure similar to the LCD2(the HP1). It was found in the later Harman studies to "The unequalized Audeze LCD-2 was described as dull and lacking presence or energy around 1-2kHz". http://www.innerfidelity.com/content/harman-researchers-make-important-headway-understanding-headphone-response Not too far from what the measured curve would suggest.
post #125 of 130
Vid, I am with Ronion and most posts here. Your topic does not seem to be the key focus of the Harman study (it may affect their results, but there are lots of other factors there that can affect the results).

If our goal is to have Dr. Olive provide responses, then please note that Dr. Olive has not chimed in since page 7. I imagine he might not want to comment on things which he is not interested in or doesn't have an answer for.
post #126 of 130
Originally Posted by vid View Post

You don't need to extract the melody and then feed it into the ear.
This is exactly why you shouldn't color the left and right speakers differently.

I agree, this is the wrong thread. i think you should start a new thread to discuss left brain/right brain processing as it is certainly an interesting topic smily_headphones1.gif
Why dont you start the thread and copy your original post on the matter (or link to it) and include a link to the paper?
post #127 of 130

I suspect scientists would be more prone to hang around here had we more scientific rigor on offer rather than an attempt to have shortcuts and to accept results regardless of objections raised.

post #128 of 130
Originally Posted by vid View Post

Having glanced through the slides and the blog post, I wonder whether the channel balance of the headphones was considered in tandem with the type of music played, and further, whether listeners might have a preference for a perfect channel balance or one where certain frequencies are emphasized on one but not the other channel? This I wonder after having looked over the short piece Why do mothers cradle babies on their left? by Sieratzki and Woll, where they suggest via reference that the left ear is more adept at recognizing melody while the right grammar.
Channel balance has been shown to be Attribute of preferred headphones. Maybe people like grammar just as much as melody. There could be several reason for that as I think has been well covered. wink.gif

I'm not sure if any genre research has been done. I wouldn't be shocked if Harman has done it though. They have done research on reliable recordings to judge spectral balance. Ideally the desired FR should be built into the recording--the playback aystem would ideally be neutral. I've seen papers done on the general frequency content of various genres, if playback was standardized, there should be no real need for different frequency curves for different genres. That said, playback is far from standardized. There may well be just as much difference between any two recordings, or recordings from any 2 studios as there is for genres. Who knows? (Hopefully someone). If a particular genre fan like a particular curve over a neutral one then you'd think the whole genre of studio mixing/mastering engineers had playback systems skewed in a similar manor. I wouldn't be shocked.
post #129 of 130

Should the channel balance have been normalized in this study? If so, why, and if not, why?

post #130 of 130
I'd say that depends on how it's measured. Straight off the driver? Yes. Why: otherwise the imbalance could skew the result b/c we are looking for an ideal curve. If the ear is involved in the measurement: no, we live with those differences everyday. If we corrected for them, it would skew the results again.

That's the type of straight forward question I was looking for in my "me?" Response.
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