Re: Headphone equalization (=?ISO-8859-1?Q?Henrik_M=F8ller?= )


Subject: Re: Headphone equalization
From:    =?ISO-8859-1?Q?Henrik_M=F8ller?=  <hm@xxxxxxxx>
Date:    Sun, 20 Jan 2008 19:19:41 +0100
List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY>

This is a multi-part message in MIME format. --------------050503060101050009030701 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: quoted-printable X-MIME-Autoconverted: from 8bit to quoted-printable by torrent.cc.mcgill.ca id m0KIJf0Y031541 Hey You might also want to read these: Henrik M=F8ller, Dorte Hammersh=F8i, Clemen Boje Jensen, Michael Friis=20 S=F8rensen: "/Transfer characteristics of headphones measured on human=20 ears/", Journal of the Audio Engineering Society, Vol. 43, No. 4, April=20 1995, pp. 203-217. Henrik M=F8ller, Clemen Boje Jensen, Dorte Hammersh=F8i, Michael Friis=20 S=F8rensen: "/Design criteria for headphones/", Journal of the Audio=20 Engineering Society, Vol. 43, No. 4, April 1995, pp. 218-232. Headphone transfer functions are - unfortunately - not always nice, and=20 they vary a lot with the ears they are put on. Best regards Henrik --=20 Henrik M=F8ller Professor Acoustics Aalborg University Fredrik Bajers Vej 7 B5 DK-9220 Aalborg =D8, Denmark Phone: +45 9635 8711 (direct) Phone: +45 9635 8710 (section office) Phone: +45 9635 8080 (switchboard) Fax: +45 9815 2144 (section office) mailto:hm@xxxxxxxx (personal) mailto:acoustics@xxxxxxxx (section office) http://acoustics.aau.dk S=F8ren Bech skrev: > > Hi Larry > > I could suggest chapter 8.3 in Bech & Zacharov "Perceptual audio=20 > evaluation. Theory, method and application" (=20 > http://eu.wiley.com/WileyCDA/WileyTitle/productCd-0470869232.html ) -=20 > there you will find an explanation of the various standard procedures=20 > as well as references to all the international standards on=20 > calibration of headphones. > > Regards > Soren > > > *Tony Miller <antonio.miller@xxxxxxxx>* > Sent by: AUDITORY - Research in Auditory Perception=20 > <AUDITORY@xxxxxxxx> > > 17-01-2008 16:27 > Please respond to > Tony Miller <antonio.miller@xxxxxxxx> > > > =09 > To > AUDITORY@xxxxxxxx > cc > =09 > Subject > Re: Headphone equalization > > > > =09 > > > > > > 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 o= f > > 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 > > --------------050503060101050009030701 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type"> </head> <body bgcolor="#ffffff" text="#000000"> Hey<br> <br> You might also want to read these:<br> <p>Henrik M&oslash;ller, Dorte Hammersh&oslash;i, Clemen Boje Jensen, Michael Friis S&oslash;rensen: "<i>Transfer characteristics of headphones measured on human ears</i>", Journal of the Audio Engineering Society, Vol. 43, No. 4, April 1995, pp. 203-217.<br> </p> <p>Henrik M&oslash;ller, Clemen Boje Jensen, Dorte Hammersh&oslash;i, Michael Friis S&oslash;rensen: "<i>Design criteria for headphones</i>", Journal of the Audio Engineering Society, Vol. 43, No. 4, April 1995, pp. 218-232. </p> <p>Headphone transfer functions are - unfortunately - not always nice, and they vary a lot with the ears they are put on.<br> </p> <p>Best regards<br> </p> Henrik<br> <pre class="moz-signature" cols="72">-- Henrik M&oslash;ller Professor Acoustics Aalborg University Fredrik Bajers Vej 7 B5 DK-9220 Aalborg &Oslash;, Denmark Phone: +45 9635 8711 (direct) Phone: +45 9635 8710 (section office) Phone: +45 9635 8080 (switchboard) Fax: +45 9815 2144 (section office) <a class="moz-txt-link-freetext" href="mailto:hm@xxxxxxxx">mailto:hm@xxxxxxxx</a> (personal) <a class="moz-txt-link-freetext" href="mailto:acoustics@xxxxxxxx">mailto:acoustics@xxxxxxxx</a> (section office) <a class="moz-txt-link-freetext" href="http://acoustics.aau.dk">http://acoustics.aau.dk</a></pre> <br> S&oslash;ren Bech skrev: <blockquote cite="mid:OF60DE64F9.D494DDD8-ONC12573D3.00577B00-C12573D3.0057D3F4@xxxxxxxx" type="cite"><br> <font face="sans-serif" size="2">Hi Larry</font> <br> <br> <font face="sans-serif" size="2">I could suggest chapter 8.3 in Bech &amp; Zacharov "Perceptual audio evaluation. Theory, method and application" ( <a class="moz-txt-link-freetext" href="http://eu.wiley.com/WileyCDA/WileyTitle/productCd-0470869232.html">http://eu.wiley.com/WileyCDA/WileyTitle/productCd-0470869232.html</a> ) - 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 face="sans-serif" size="2">Regards</font> <br> <font face="sans-serif" size="2">Soren </font> <br> <br> <br> <table width="100%"> <tbody> <tr valign="top"> <td width="40%"><font face="sans-serif" size="1"><b>Tony Miller <a class="moz-txt-link-rfc2396E" href="mailto:antonio.miller@xxxxxxxx">&lt;antonio.miller@xxxxxxxx&gt;</a></b> </font><br> <font face="sans-serif" size="1">Sent by: AUDITORY - Research in Auditory Perception <a class="moz-txt-link-rfc2396E" href="mailto:AUDITORY@xxxxxxxx">&lt;AUDITORY@xxxxxxxx&gt;</a></font> <p><font face="sans-serif" size="1">17-01-2008 16:27</font> <table border="1"> <tbody> <tr valign="top"> <td bgcolor="white"> <div align="center"><font face="sans-serif" size="1">Please respond to<br> Tony Miller <a class="moz-txt-link-rfc2396E" href="mailto:antonio.miller@xxxxxxxx">&lt;antonio.miller@xxxxxxxx&gt;</a></font></div> </td> </tr> </tbody> </table> <br> </p> </td> <td width="59%"> <table width="100%"> <tbody> <tr valign="top"> <td> <div align="right"><font face="sans-serif" size="1">To</font></div> </td> <td><font face="sans-serif" size="1"><a class="moz-txt-link-abbreviated" href="mailto:AUDITORY@xxxxxxxx">AUDITORY@xxxxxxxx</a></font> </td> </tr> <tr valign="top"> <td> <div align="right"><font face="sans-serif" size="1">cc</font></div> </td> <td><br> </td> </tr> <tr valign="top"> <td> <div align="right"><font face="sans-serif" size="1">Subject</font></div> </td> <td><font face="sans-serif" size="1">Re: Headphone equalization</font></td> </tr> </tbody> </table> <br> <table> <tbody> <tr valign="top"> <td> <br> </td> <td><br> </td> </tr> </tbody> </table> <br> </td> </tr> </tbody> </table> <br> <br> <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 <a class="moz-txt-link-rfc2396E" href="mailto:feth.1@xxxxxxxx">&lt;feth.1@xxxxxxxx&gt;</a> 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> </blockquote> <br> </body> </html> --------------050503060101050009030701--


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