Re: Headphone equalization (=?ISO-8859-1?Q?S=F8ren_Bech?= )

Subject: Re: Headphone equalization
From:    =?ISO-8859-1?Q?S=F8ren_Bech?=  <SBE@xxxxxxxx>
Date:    Thu, 17 Jan 2008 16:59:19 +0100
List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY>

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Hi Larry

I could suggest chapter 8.3 in Bech & Zacharov "Perceptual audio 
evaluation. Theory, method and application" ( 
http://eu.wiley.com/WileyCDA/WileyTitle/productCd-0470869232.html ) - 
there you will find an explanation of the various standard procedures as 
well as references to all the international standards on calibration of 
headphones.

Regards
Soren 



Tony Miller <antonio.miller@xxxxxxxx> 
Sent by: AUDITORY - Research in Auditory Perception 
<AUDITORY@xxxxxxxx>
17-01-2008 16:27
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Tony Miller <antonio.miller@xxxxxxxx>


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Subject
Re: Headphone equalization






Quick solution:

In the telecommunications speech band, you could pull a pair of
Sennheiser HD600's off the shelf and do no equalization and have
reasonable confidence that they are +/- a few dB.

Not so quick solution:

There are much more involved calibration schemes we use for playback
of binaural recordings, but they involve an artificial head and
modeling the transfer function in MATLAB with linear phase FIR
filters.

On Jan 16, 2008 9:43 PM, Larry Feth <feth.1@xxxxxxxx> wrote:
> Does anyone have a quick way to equalize for the frequency response of
> a headphone so that broadband signals are not altered by peaks or
> valleys in the magnitude response?  Matlab code would be ideal.
>
> Larry Feth

--
Tony Miller
Motorola APTC Acoustic Technology Center
8000 West Sunrise Blvd, Mail Stop 22-7-F
Plantation, FL 33322-4104
Cell: (954) 605-7982 | Desk: (954) 723-3989



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<br><font size=2 face="sans-serif">Hi Larry</font>
<br>
<br><font size=2 face="sans-serif">I could suggest chapter 8.3 in Bech
&amp; Zacharov &quot;Perceptual audio evaluation. Theory, method and application&quot;
( http://eu.wiley.com/WileyCDA/WileyTitle/productCd-0470869232.html ) -
there you will find an explanation of the various standard procedures as
well as references to all the international standards on calibration of
headphones.</font>
<br>
<br><font size=2 face="sans-serif">Regards</font>
<br><font size=2 face="sans-serif">Soren </font>
<br>
<br>
<br>
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<td width=40%><font size=1 face="sans-serif"><b>Tony Miller &lt;antonio.miller@xxxxxxxx&gt;</b>
</font>
<br><font size=1 face="sans-serif">Sent by: AUDITORY - Research in Auditory
Perception &lt;AUDITORY@xxxxxxxx&gt;</font>
<p><font size=1 face="sans-serif">17-01-2008 16:27</font>
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<div align=center><font size=1 face="sans-serif">Please respond to<br>
Tony Miller &lt;antonio.miller@xxxxxxxx&gt;</font></div></table>
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<div align=right><font size=1 face="sans-serif">To</font></div>
<td><font size=1 face="sans-serif">AUDITORY@xxxxxxxx</font>
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<div align=right><font size=1 face="sans-serif">cc</font></div>
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<div align=right><font size=1 face="sans-serif">Subject</font></div>
<td><font size=1 face="sans-serif">Re: Headphone equalization</font></table>
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<td></table>
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<br><font size=2><tt>Quick solution:<br>
<br>
In the telecommunications speech band, you could pull a pair of<br>
Sennheiser HD600's off the shelf and do no equalization and have<br>
reasonable confidence that they are +/- a few dB.<br>
<br>
Not so quick solution:<br>
<br>
There are much more involved calibration schemes we use for playback<br>
of binaural recordings, but they involve an artificial head and<br>
modeling the transfer function in MATLAB with linear phase FIR<br>
filters.<br>
<br>
On Jan 16, 2008 9:43 PM, Larry Feth &lt;feth.1@xxxxxxxx&gt; wrote:<br>
&gt; Does anyone have a quick way to equalize for the frequency response
of<br>
&gt; a headphone so that broadband signals are not altered by peaks or<br>
&gt; valleys in the magnitude response? &nbsp;Matlab code would be ideal.<br>
&gt;<br>
&gt; Larry Feth<br>
<br>
--<br>
Tony Miller<br>
Motorola APTC Acoustic Technology Center<br>
8000 West Sunrise Blvd, Mail Stop 22-7-F<br>
Plantation, FL 33322-4104<br>
Cell: (954) 605-7982 | Desk: (954) 723-3989<br>
<br>
</tt></font>
<br>
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