Measuring and Correction of Frequency Response for Head-Phones - diyAudio
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Old 8th August 2012, 09:38 AM   #1
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Default Measuring and Correction of Frequency Response for Head-Phones

What is the right way for measuring the frequency response of different headphones?
I have various models like Sennheiser HD424 and HD414 so as several sealed and "in ear" headphones.
The usual methody like practiced by loudspeaker in the near field isn't helpful and thus not for evaluate.
Thank you for comments.
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Old 8th August 2012, 10:23 AM   #2
d a o is offline d a o  Denmark
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Hi

I do not think that there is a unique way to do it right on, but their are some standards which makes it possible to compare the measurements with each other. but it is expensive.
In the DIY world can one be as good as another as long as you have something to relate to and can compare with.
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Last edited by d a o; 8th August 2012 at 10:29 AM.
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Old 8th August 2012, 02:17 PM   #3
oshifis is offline oshifis  Hungary
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You can use a tiny electret capsule plugged in your ear canal. But in this case the ear canal frequency response is also included.
Then there is the inverse method: you apply the measuring signal to one side (e.g L channel), and measure the voltage at the other side (e.g. R channel) of the headphones. The two sides should be pressed together.
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Old 8th August 2012, 10:00 PM   #4
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Not entirely on topic but related, you might find interest in this article I came across a couple days ago dealing with measurement response discrepancy of artificial head/ear.
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Old 10th August 2012, 06:26 AM   #5
d a o is offline d a o  Denmark
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Old 11th August 2012, 02:20 AM   #6
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Here are some links on EQ-ing headphones for the individual listener.
How to equalize your headphones: A Tutorial

If you are not familiar with them, there are master DIY-ers such as this, which possibly you are trying to emulate?

http://www.davidgriesinger.com/headphones.htm

Both authors point out that each person's ear (the physical part) is unique, and thus leads to differing frequency responses among different persons. Thus, even if a pair of headphones is perfect 20 Hz - 20K Hz on the Nuemann dummy or whatever, it is very unlikely to be so on YOU! Also, there is the issue of subjective loudness. I have tried EQ-ing headphones and also regular speakers with 1/3 octave pink noise and just listening to try to get them to the same apparent (subjective) level, and the results have been very fine.

Last edited by Soldermizer; 11th August 2012 at 02:28 AM. Reason: a veritable fountain of eloquence
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Old 12th August 2012, 04:39 AM   #7
RNMarsh is offline RNMarsh  United States
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Default probe mic for EQ

Quote:
Originally Posted by Soldermizer View Post
Here are some links on EQ-ing headphones for the individual listener.
How to equalize your headphones: A Tutorial

If you are not familiar with them, there are master DIY-ers such as this, which possibly you are trying to emulate?

The necessity of headphone equalization

Both authors point out that each person's ear (the physical part) is unique, and thus leads to differing frequency responses among different persons. Thus, even if a pair of headphones is perfect 20 Hz - 20K Hz on the Nuemann dummy or whatever, it is very unlikely to be so on YOU! Also, there is the issue of subjective loudness. I have tried EQ-ing headphones and also regular speakers with 1/3 octave pink noise and just listening to try to get them to the same apparent (subjective) level, and the results have been very fine.
As part of my headphone amplifier project
, I show how to make a probe microphone and using auto room correction eq - you can flatten the response of any headphone. See Linear Audio publication. ---RNMarsh
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