samvafaei
Head-Fier
- Joined
- May 4, 2016
- Posts
- 66
- Likes
- 27
Thanks for all the comments guys!
The idea comes from the assumption that the perfect headphone sounds like the perfect loudspeaker in the perfect room, whatever perfect means*. And this was largely confirmed in a few studies where listener's preference was measured.
*Harman took Floyd Toole's research for loudspeaker target response as the starting point. Toole's research wasn't really earth shattering, in the sense that it didn't contradict the already accepted consensus that the ideal loudspeaker measures flat in an anechoic room.
You are indeed correct that some headphone companies are following the direction of Harman (or have done their own studies that reached a similar conclusion). Check out BeatsX and Solo2/3 for example, they are a massive improvement over previous Beats headphones! It's also interesting to see how some very popular older headphones end up lining up pretty well against our/Harman curve. DT990 and M50x for example.
I'm not sure about the Golden Ear's curve, but in my personal opinion which could obviously be wrong, we have figured out the ideal headphones response up to 1KHz, give or take a dB or two for personal preference and program genre. It's the treble part that needs some work. The JBL Everest Elite 700 that is based on the Harman target measures basically flat on our website up to 1KHz. What I believe adds to the circle of contusion, is that the tracks people use as reference may not be mixed properly, or that they may not be trained audio engineers. For example, if I listen to some older 70's rock our/Harman curve would not have nearly enough bass. Just because older tracks do not enough bass! For a true control test, the reference tracks should be mixed in the same environment where the target curve was derived from.
Research also has shown that untrained listeners do prefer the Harman-based targets, given the chance. They just may not be able to express their perception as well, and are less critical of poorly balanced sound signatures.
As I mentioned in the video research has suggested that humans perceive more or less the same thing, especially if they are trained engineers. It seems we do have an inverse filter of our own hardware. But the thing I'm not quite sure about, is whether headphones behave differently on different people in the treble range depending the shape and size of the head/ear. That would be a different story.
Our scoring system does give less weight to low-bass and high-treble for example, since we are less sensitive to changes in that range. But there's always room for improvement and we have already some ideas in place for future improvements.
Doing things subjectively goes against the philosophy behind the website, partly because it's not reliable, scalable or repeatable. For example, we do score the Comfort section subjectively (since clamping force is not all that there is to comfort). We do it in a team of 3 and average our scores. But as our number of headphones grow, we find it harder and harder to do this test subjectively and have to constantly go back and double check our work. We also keep noticing our personal biases come into play. Talking yourself into giving a poorly sounding headphone a stellar comfort score is harder than you think!
That can be fixed easily. To be honest, I never quite understood the Harman curve stuff. The justification seems to be based on statistical percentage of listener preferences, but if preference defines the ideal EQ curve I might as well make up my own. Am I missing something?
The idea comes from the assumption that the perfect headphone sounds like the perfect loudspeaker in the perfect room, whatever perfect means*. And this was largely confirmed in a few studies where listener's preference was measured.
*Harman took Floyd Toole's research for loudspeaker target response as the starting point. Toole's research wasn't really earth shattering, in the sense that it didn't contradict the already accepted consensus that the ideal loudspeaker measures flat in an anechoic room.
for the headphone market I do feel like many brands took the series of Harman papers seriously and that it might have participated in getting many rather cheap headphones/IEMs with a fairly nice sound. but I really have no evidence of that and could be full of crap right now ^_^. gut feeling 110%.
of course if that direction the standard sets isn't actually a consensus on preferred signature or perceived neutral, then we would be aiming at the wrong target like idiots and that would be bad for us all. the same way we have been for years with the diffuse field target that almost nobody finds to sound neutral or the most enjoyable. yet most graphs are shown with that compensation as reference. and way too many people still think that flat on those graph is the legendary "neutral" that lets us join an elite group of audiophiles.
I personally fall between diffuse field and the Harman target so to me it doesn't really matter, I just accept that I'm not standard ^_^. but if I could only pick one of the 2, I would definitely go for Harman. a little too warm is dull, a little to bright is pain.
I know many people who feel that the target on the Golden Ears website sounds to them more aligned than the classic diffuse field. and they too go for a boost in the low end. so maybe there really is something there? but we'd need a little more than my private conversations to decide what is most often perceived as nice or neutral.
as a listener I will of course keep EQing everything to my very own preferences. but that has nothing to do with standards. I also feel that chairs are too low and wish there were more left handed mice ^_^.
You are indeed correct that some headphone companies are following the direction of Harman (or have done their own studies that reached a similar conclusion). Check out BeatsX and Solo2/3 for example, they are a massive improvement over previous Beats headphones! It's also interesting to see how some very popular older headphones end up lining up pretty well against our/Harman curve. DT990 and M50x for example.
I'm not sure about the Golden Ear's curve, but in my personal opinion which could obviously be wrong, we have figured out the ideal headphones response up to 1KHz, give or take a dB or two for personal preference and program genre. It's the treble part that needs some work. The JBL Everest Elite 700 that is based on the Harman target measures basically flat on our website up to 1KHz. What I believe adds to the circle of contusion, is that the tracks people use as reference may not be mixed properly, or that they may not be trained audio engineers. For example, if I listen to some older 70's rock our/Harman curve would not have nearly enough bass. Just because older tracks do not enough bass! For a true control test, the reference tracks should be mixed in the same environment where the target curve was derived from.
Research also has shown that untrained listeners do prefer the Harman-based targets, given the chance. They just may not be able to express their perception as well, and are less critical of poorly balanced sound signatures.
Music is mixed with human ears and human ears don't perceive all frequencies evenly. An arbitrary concept of "flat" needs to be compensated for what our ears perceive as balanced. It makes total sense, but it's just an approximation because everyone has a slightly different noggin. I think the Harman curve is well thought out, and I think it's fine for what it is.
As I mentioned in the video research has suggested that humans perceive more or less the same thing, especially if they are trained engineers. It seems we do have an inverse filter of our own hardware. But the thing I'm not quite sure about, is whether headphones behave differently on different people in the treble range depending the shape and size of the head/ear. That would be a different story.
I like the idea of a standard, and think Harman has done interesting work, but if the aim is to find a curve that mimics the natural perceptions of sound, it would be nice to see something more objective, like a weighing of frequencies based on perceived loudness vs. actual SPL. I guess the problem with that is measuring perception. Maybe a listening test prior to EQing. I like the idea of delineating differences between "flat" for a mic transducer vs human ears, but if people are deciding this just based on preference stats, it seems like the target will keep moving. Even mastering decisions will effect our concept of what we expect "neutral" to sound like.
Sam, I really like how you guys quantify as much as you can. Your work on anatomical differences is very interesting. I have a large tragus and anti-tragus and wondered how that might effect the perception of sound. Maybe we each need our own custom ear molds to do proper EQ. Your meticulous measurements I noticed even includes clamping pressure. 1.4lbs on my HD600s when new was enough to give me a headache, and it’s good to know the exact force now that could cause that.
If I had one suggestion it would be to include a bit more subjective observation. When I checked the “best of” suggested headphones, I couldn’t always see the reasoning for the choice and felt like there must be a guiding factor or a weighing of features that wasn’t explicitly stated. Nobody can avoid having a preference for one headphone’s sound over another, so it helps to know the reviewer’s preference in addition to objective performance metrics.
Great work!
Our scoring system does give less weight to low-bass and high-treble for example, since we are less sensitive to changes in that range. But there's always room for improvement and we have already some ideas in place for future improvements.
Doing things subjectively goes against the philosophy behind the website, partly because it's not reliable, scalable or repeatable. For example, we do score the Comfort section subjectively (since clamping force is not all that there is to comfort). We do it in a team of 3 and average our scores. But as our number of headphones grow, we find it harder and harder to do this test subjectively and have to constantly go back and double check our work. We also keep noticing our personal biases come into play. Talking yourself into giving a poorly sounding headphone a stellar comfort score is harder than you think!
Last edited: