CHANGSTAR: Audiophile Headphone Reviews and Early 90s Style BBS

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Author Topic: Playing with Harman target EQ curve with various hi-fi headphones  (Read 4868 times)

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Sorrodje

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Re: Playing with Harman target EQ curve with various hi-fi headphones
« Reply #40 on: September 10, 2015, 07:36:49 PM »

Mayhaps you guys could include a OW preset curve so people could correct their headphones to the newest FOTM curve

Brownies for you . Why the fuck did this fuckin OW curve become the new standard for everybody ?

Anaxilus

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Re: Playing with Harman target EQ curve with various hi-fi headphones
« Reply #41 on: September 10, 2015, 07:42:10 PM »

Brownies for you . Why the fuck did this fuckin OW curve become the new standard for everybody ?


Someone published a white paper.
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Hroðulf

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Re: Playing with Harman target EQ curve with various hi-fi headphones
« Reply #42 on: September 10, 2015, 07:55:50 PM »

Brownies for you . Why the fuck did this fuckin OW curve become the new standard for everybody ?

Why do you think headphones AFR wise are all over the place? There is NO standard how to measure headphone AFR. Not to mention that there currently are NO tools purpose made for measuring that. To my knowledge all head-cheek couplers and dummy heads are meant to measure SPL's so they can ban cans like MDR-7520 in EU.

The reason is that for a long long time headphones were the underdog for listening. Something for those late night listens to not wake the kids up. It just wasn't a priority for acoustic research. I fully agree with the guys saying that studio monitors in many regards are light years ahead of headphones.
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Sorrodje

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Re: Playing with Harman target EQ curve with various hi-fi headphones
« Reply #43 on: September 10, 2015, 08:17:38 PM »

Someone published a white paper.

that didn't convince me that much. Interesting work though.

Marvey

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Re: Playing with Harman target EQ curve with various hi-fi headphones
« Reply #44 on: September 10, 2015, 10:22:11 PM »

Tyll already did the OW correction thing:



In order to get the OW sound you just need to apply the EQ to this plot ...

Not so easy with HD800. FR measurements are almost always with a long window (or at least a long window relative to short wavelength / high frequencies). Problem with the HD800 is reflections from inside the cups. Our ears and the supercomputers inside our heads may be able to distinguish to some extent between the original signal from the super early reflections that cause the 6kHz measurement peak.

Our ears don't hear in long FFT windows.

There is a lot of art that goes into measuring and EQ. Anyone who has taken measurements on speakers (with gated FFT windows to avoid floor, side, ceiling reflections) and un-gated full length FFTs understands this. This is why I've thought about also doing the V1 measurements of the past where I used a sponge as a coupler.
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Anaxilus

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Re: Playing with Harman target EQ curve with various hi-fi headphones
« Reply #45 on: September 10, 2015, 10:30:04 PM »

that didn't convince me that much. Interesting work though.

But it's a white paper!
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Re: Playing with Harman target EQ curve with various hi-fi headphones
« Reply #46 on: September 10, 2015, 10:41:35 PM »

I still would have liked to see the measurements of the reference speaker that was used for the OW curve. On-axis, 30 degree off-axis. Anechoic or gated, or in-room at listening position measurements. Correct me if I am wrong, but all I remember reading was something to the effect of "we used our super-duper high-end calibrated flat Harmon reference speakers and averaged the result on three microphones ... just trust us... it was totally neutral." It seems this would have been a crucial piece, but somehow the details of this went missing.

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Donald North

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Re: Playing with Harman target EQ curve with various hi-fi headphones
« Reply #47 on: September 10, 2015, 10:46:34 PM »

While it is a logical possible target EQ curve to match a speaker in a room (which speaker, which room, placement within the room, etc), I am not sure if this is the "holy grail" for all headphone listening. When I made my own binaural recordings in college in the early 90s, I found the best headphones for playback of them for the most realistic experience were my 1990 DT990s which were diffuse field equalized. They were better than the AKGs and Sennheisers at the time for that application, in my experience. I suspect the HD800 would work well with binaural recordings.
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TMRaven

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Re: Playing with Harman target EQ curve with various hi-fi headphones
« Reply #48 on: September 10, 2015, 10:52:18 PM »

I have tried playing with the proposed EQ on IF for the HD800s.  A little boost in the bass of around 3-5db (more db towards 20-30hz) is acceptable, as is EQ'ing down some of the treble.  I think +6db at 1.5khz is too much though.  The most I EQ'd up the upper midrange was 3db.
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Anaxilus

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Re: Playing with Harman target EQ curve with various hi-fi headphones
« Reply #49 on: September 10, 2015, 10:55:08 PM »

I suspect the HD800 would work well with binaural recordings.

Oh god, it's freaking ridiculous how good those can sound.
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"If you do not change direction, you may end up where you are heading." - Lao Tzu

"The Claw is our master. The Claw chooses who will go or who will stay." - The LGM Community

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