Subject: Re: [AUDITORY] Who coined the term "head-related transfer function"? From: Pierre Divenyi <pdivenyi@xxxxxxxx> Date: Mon, 26 Feb 2018 09:57:33 -0800 List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY>This is a multi-part message in MIME format. --------------C739BF42F52B8B53FE95856A Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: quoted-printable X-MIME-Autoconverted: from 8bit to quoted-printable by edgeum1.it.mcgill.ca id w1QHvh0J017434 Dick, Sorry -- I did not realize that I was responding not to your idea but to=20 a translation of Jens Blauert's posting. This being the case, what's=20 your opinion about the KEMAR's HRTFs being the only unadulterated ones? Pierre On 2/25/18 9:39 PM, Richard F. Lyon wrote: > Pierre, you're replying to me for what I translated from Blauert.=C2=A0= =20 > Please amend. > Dick > > > 2018-02-25 21:33 GMT-08:00 PIerre DIVENYI <pdivenyi@xxxxxxxx=20 > <mailto:pdivenyi@xxxxxxxx>>: > > Dick, > > Reading your very thoughtful analyis the real, I mean =E2=80=9Creal= ,=E2=80=9D > question that comes to mind is what, if any, the use of the many > available HRTF databases is, since (as you state) these functions > are time varying and even subject to cognitvely induced changes. > This being the case, the only reliable HRTFs are those measured in > KEMAR, a head the cognitive functions inside which should be > negligible. > > Pierre > > Sent from my iPad > > On Feb 25, 2018, at 19:16, Richard F. Lyon <dicklyon@xxxxxxxx > <mailto:dicklyon@xxxxxxxx>> wrote: > >> Hello Mr. Schoenwiesner - >> Here are the mails that have come to me. As Dorte Hammershoei >> rightly notes, the outer ear transmission functions are old hat. >> In particular, Shaw has contributed much to this. The word >> "head-related" has long been common and semantically correct in >> stereophony as opposed to "spatially referenced". The transfer >> function to the eardrum from a plane wave or the near field of a >> source are not head related, but are just the transfer functions >> of the head (together with the upper body). At the time, Geo >> Plenge had a big problem with Dennis McFadden, who did not want >> to print his article on Out-of-the-Head Locality. I always >> suspect nor that Dennis suggested the wrong term HRTf, instead of >> HTF, which would have been better. Now, the abbreviation HRTF but >> has introduced worldwide, and especially Americans love handy >> shortcuts. More interesting today is the question to what extent >> HRTFs, which presuppose LTI systems, describe the situation with >> sufficient accuracy. For example, the eardrum impedance is >> modulation-dependent. This is but u.a. controlled by the middle >> ear muscle reflex, where even cognitive feedback plays a role. >> Furthermore, head movements play a major role in current >> research, with the "HRTFs" being time-varying !! So there is >> still much to do. I myself have the pure discovers physical >> aspects of this topic and is currently writing. about feedback in >> the auditory system. >> >> - With kind regards, Jens Blauert >> >> 2018-02-20 11:43 GMT-08:00 Pierre Divenyi >> <pdivenyi@xxxxxxxx <mailto:pdivenyi@xxxxxxxx>>= : >> >> Dick, >> You can do the Google translate this time. It's an >> interesting mail, also pointing out the impossibility of >> translating word-by-word between languages. >> Best, >> Pierre >> >> >> -------- Forwarded Message -------- >> Subject: Re: Who coined the term "head-related transfer >> function"? >> Date: Tue, 20 Feb 2018 12:01:36 +0100 >> From: jens.blauert <jens.blauert@xxxxxxxx> >> <mailto:jens.blauert@xxxxxxxx> >> To: Marc Schoenwiesner <marc.schoenwiesner@xxxxxxxx> >> <mailto:marc.schoenwiesner@xxxxxxxx>, Jens Blauert >> <jens.blauert@xxxxxxxx> <mailto:jens.blauert@xxxxxxxx> >> >> >> >> >> *Hallo Herr Schoenwiesner --** >> **Anbei die Mails, die bei mir eingegangen sind. Wie Dorte >> Hammershoei richtig bemerkt, sind die Au=C3=9Fenohr- >> =C3=9Cbertragungsfunktionen ein alter Hut. Insbesondere Shaw h= at >> hierzu viel beigetragen. Das Wort "kopfbezogen" ist bei >> Stereophonie in Gegensatz zu "raumbezogen"****seit langen >> =C3=BCblich und semantisch korrekt. Die =C3=9Cbertragungsfunkt= ion zum >> Trommelfell aus einer ebenen Welle oder dem Nahfeld einer >> Quelle=C2=A0 sind aber nicht kopfbezogen, sondern sind eben di= e=C2=A0 >> =C3=9Cbertragunsfunktionen des Kopfes (zusammen mit dem >> Oberk=C3=B6rper). Georg Plenge hatte seinerzeit ein gro=C3=9Fe= s Problem >> mit Dennis=C2=A0 McFadden, der seinen Artikel zur >> Au=C3=9Ferhalb-des-Kopfes-Lokalisiertheit nicht drucken wollte. >> Ich vermute immer >> noch, dass Dennis den falschen Ausdruck HRTf angeregt hat, >> statt HTF, was besser gewesen w=C3=A4re. Nun hat sich die >> Abk=C3=BCrzung=C2=A0 HRTF aber weltweit eingef=C3=BChrt, und i= nsbesondere >> Amerikaner lieben griffige Abk=C3=BCrzungen. **Interessant ist >> heute eher die=C2=A0 Frage, inwieweit HRTFs, die ja LTI-System= e >> vorausetzen, die Sachlage hinreichend genau beschreiben. Zum >> Beispiel ist die Trommelfellimpedanz aussteuerungsabh=C3=A4ngi= g. >> Diese ist aber u.a. durch den Mittelohrmuskel-Reflex >> gesteuert, wo bei dabei sogar kognitives Feedback eine Rolle >> spielt. Des weiteren spielen in der aktuellen Forschung >> Kopfbewegungen ein gro=C3=9Fe Rolle, wobei die "HRTFs" dann >> zeitvariant sind!! Es ist also noch viel zu tun.=C2=A0 Ich sel= bst >> habe mich bez=C3=BCglich der rein >> physikalische Aspekte dieses Themas ausgeklinkt und schreibe >> z.Zt. =C3=BCber Feedback im auditorischen System.** >> **-- Mit Gru=C3=9F, Ihr Jens Blauert =C2=A0 =C2=A0 =C2=A0 =C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 --> Anhang** >> * >> Am 19.02.2018 um 12:02 schrieb Marc Schoenwiesner: >>> Lieber Herr Blauert, >>> >>> Bitte leiten Sie die Mail weiter, danke. Meine Suche nach >>> dem Ursprung des Begriffs kommt von einem DFG-Antrag zum >>> Thema an dem ich gerade sitze. >>> >>> Viele Gr=C3=BC=C3=9Fe, >>> Ihr Marc Sch=C3=B6nwiesner >>> >>> PS.: Ich hatte Sie ca. 2001 kurz im Labor in Bochum besucht. >>> Einer Ihrer Studenten gab eine Demonstration der dynamischen >>> Raumschallsimulation. Das wissenschaftliche Interesse am >>> Thema ist geblieben, daher der Antrag. >>> >>> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D >>> Vice Dean Dept of Life Sciences >>> Professor =C2=A0of =C2=A0Neurobiology >>> Department of Biology >>> University of Leipzig >>> Talstrasse 33 >>> <https://maps.google.com/?q=3DTalstrasse+33&entry=3Dgmail&sou= rce=3Dg> >>> =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 __o >>> 04103 Leipzig _`\<,_ >>> +493419736723 <tel:+49%20341%209736723> =C2=A0 =C2=A0(+) / (+= ) >>> & Department of Psychology >>> University =C2=A0of =C2=A0Montreal >>> Montreal, Quebec, Canada >>> www.schoenwiesnerlab.ca <http://www.schoenwiesnerlab.ca/> >>> www.uni-leipzig.de/~neuro/ <http://www.uni-leipzig.de/%7Eneur= o/> >>> http://uni-leipzig.de/~acn/ <http://uni-leipzig.de/%7Eacn/> >>> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D >>> >>>> On 18. Feb 2018, at 12:23, jens.blauert >>>> <jens.blauert@xxxxxxxx <mailto:jens.blauert@xxxxxxxx>> wrote: >>>> >>>> *Hallo Herr Sch=C3=B6nwiesner --** >>>> **Ja, so ist es wohl. Ich habe mich sp=C3=A4ter mal mit Whit= eman >>>> & Kistler dar=C3=BCber unterhalten, ** >>>> **dass HRTR eigentlich semantisch nicht zutrifft. Sie >>>> stimmten zu und wir waren uns einig, >>>> dass Head-transfer function (HTF) **besser w=C3=A4re. Die be= iden >>>> haben wohl auch versucht, >>>> das den amerikanischen Kollegen zu vermitteln -- aber es >>>> war **dann wohl schon zu sp=C3=A4t.****Wer will >>>> der Sache eigentlich jetzt nachgehen? Sind Sie das? Bei mir >>>> sind schon mehrere Mails zu dem >>>> Thema eingegangen, die Sie m=C3=B6glicherweise nicht gesehen >>>> haben. Soll ich sie zu Ihnen forwarden?** >>>> **-- Gru=C3=9F, Ihr Jens Blauert** >>>> ** >>>> * >>>> m 16.02.2018 um 12:11 schrieb Marc Schoenwiesner: >>>>> Lieber Herr Blauert, >>>>> >>>>> Im JASA paper von 1972 ("On the differences between >>>>> localization and lateralization") erw=C3=A4hnt Plenge keine >>>>> HRTF, spricht aber viel =C3=BCber dummy-head transfer >>>>> functions. K=C3=B6nnte es sein, dass mit HRTF urspr=C3=BCng= lich >>>>> dummy-head transfer functions gemeint waren? >>>>> >>>>> Hier das Plenge paper: >>>>> https://pdfs.semanticscholar.org/7e36/c3e7ee73d21efad5cde91= 9fbafc21c4f442e.pdf?_ga=3D2.95831066.74002722.1518703463-1062093161.15187= 03463 >>>>> <https://pdfs.semanticscholar.org/7e36/c3e7ee73d21efad5cde9= 19fbafc21c4f442e.pdf?_ga=3D2.95831066.74002722.1518703463-1062093161.1518= 703463> >>>>> >>>>> Viele Gr=C3=BC=C3=9Fe aus Leipzig, >>>>> Marc Sch=C3=B6nwiesner >>>>> >>>>> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D >>>>> Vice Dean Dept of Life Sciences >>>>> Professor =C2=A0of =C2=A0Neurobiology >>>>> Department of Biology >>>>> University of Leipzig >>>>> Talstrasse 33 >>>>> <https://maps.google.com/?q=3DTalstrasse+33&entry=3Dgmail&s= ource=3Dg> >>>>> =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 __o >>>>> 04103 Leipzig _`\<,_ >>>>> +493419736723 <tel:+49%20341%209736723> =C2=A0 =C2=A0(+) / = (+) >>>>> & Department of Psychology >>>>> University =C2=A0of =C2=A0Montreal >>>>> Montreal, Quebec, Canada >>>>> www.schoenwiesnerlab.ca <http://www.schoenwiesnerlab.ca/> >>>>> www.uni-leipzig.de/~neuro/ >>>>> <http://www.uni-leipzig.de/%7Eneuro/> >>>>> http://uni-leipzig.de/~acn/ <http://uni-leipzig.de/%7Eacn/> >>>>> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D >>>>> >>>>>> On 16. Feb 2018, at 10:56, Jens Blauert >>>>>> <jens.blauert@xxxxxxxx <mailto:jens.blauert@xxxxxxxx>> wrote: >>>>>> >>>>>> Gru=C3=9F, Jens Blauert >>>>>> >>>>>> >>>>>> -------- Weitergeleitete Nachricht -------- >>>>>> >>>>>> *Hallo Pierre --** >>>>>> **Es war Georg Plenge (erlebt noch in Berlin) in einem >>>>>> JASA paper ca. 1972. ** >>>>>> **Wurde von Dennis Mc. Fadden reviewed. Ich hatte in >>>>>> meinem Buch "Au=C3=9Fenohr-=C3=9Cbertragungsfunktion"** >>>>>> **(external-ear transfer function) verwendet, aber HRTF >>>>>> hat sich durchgesetzt, obwohl falsch.** >>>>>> **Was hei=C3=9Ft denn "related"? Es_IST_**die >>>>>> =C3=9Cbertragungsfunktion des Kopfes bzw. Ohres! >>>>>> Das Plenge-Paper m=C3=BCsste**ich mal raussuchen. Die >>>>>> JASA-B=C3=A4nde sind in Bochum. >>>>>> Es ging dabei um Im-Kopf-Lokalisertheit bei >>>>>> Kunstkopfsignalen -- oder so =C3=A4hnlich.** >>>>>> **-- Gru=C3=9F, Jens** >>>>>> * >>>>>> >>>>>> Am 16.02.2018 um 06:28 schrieb Pierre Divenyi: >>>>>>> Dear Jens, >>>>>>> >>>>>>> You should know the answer to this question by Dick Lyon. >>>>>>> >>>>>>> Beste Gruesse, >>>>>>> Dein Pierre >>>>>>> >>>>>>> >>>>>>> -------- Forwarded Message -------- >>>>>>> Subject: Who coined the term "head-related transfer >>>>>>> function"? >>>>>>> Date: Thu, 15 Feb 2018 15:46:44 +0100 >>>>>>> From: Marc Schoenwiesner <marcs@xxxxxxxx> >>>>>>> <mailto:marcs@xxxxxxxx> >>>>>>> Reply-To: Marc Schoenwiesner <marcs@xxxxxxxx> >>>>>>> <mailto:marcs@xxxxxxxx> >>>>>>> To: AUDITORY@xxxxxxxx >>>>>>> <mailto:AUDITORY@xxxxxxxx> >>>>>>> >>>>>>> >>>>>>> >>>>>>> Dear all, >>>>>>> >>>>>>> does anyone know who coined the term=C2=A0"head-related >>>>>>> transfer function"? The first mention in a paper (as far >>>>>>> as I have been able to determine) is by Frederic >>>>>>> Wightman and Doris Kistler in 1988, but they write: >>>>>>> "...the free-field-to-eardrum transfer function >>>>>>> (sometimes called the head-related transfer function, or >>>>>>> HRTF)...", which sounds like there must be an earlier >>>>>>> source. >>>>>>> >>>>>>> Best, >>>>>>> Marc >>>>>>> >>>>>>> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D >>>>>>> Vice Dean Dept of Life Sciences >>>>>>> Professor =C2=A0of =C2=A0Neurobiology >>>>>>> Department of Biology >>>>>>> University of Leipzig >>>>>>> Talstrasse 33 >>>>>>> <https://maps.google.com/?q=3DTalstrasse+33&entry=3Dgmail= &source=3Dg> >>>>>>> =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 __o >>>>>>> 04103 Leipzig _`\<,_ >>>>>>> +493419736723 <tel:+49%20341%209736723> =C2=A0 =C2=A0(+) = / (+) >>>>>>> & Department of Psychology >>>>>>> University =C2=A0of =C2=A0Montreal >>>>>>> Montreal, Quebec, Canada >>>>>>> www.schoenwiesnerlab.ca <http://www.schoenwiesnerlab.ca/> >>>>>>> www.uni-leipzig.de/~neuro/ >>>>>>> <http://www.uni-leipzig.de/%7Eneuro/> >>>>>>> http://uni-leipzig.de/~acn/ <http://uni-leipzig.de/%7Eacn= /> >>>>>>> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D >>>>>>> >>>>>> -- Jens BLAUERT, Dr.-Ing., Dr. Tech. h.c. Prof. (em.), >>>>>> Acoustics and EE, Ruhr-Universit=C3=A4t Bochum Prof. (adj.= ), >>>>>> Architectural Acoustics, RPI, Troy NY Postal address: >>>>>> Institute of Communication Acoustics, Ruhr-Universit=C3=A4= t >>>>>> Bochum, D-44780 Bochum, Germany E-mail: >>>>>> jens.blauert@xxxxxxxx <mailto:jens.blauert@xxxxxxxx> >>>>>> Internet: http://www.rub.de/ika Phone: +49 234 322 2496 >>>>>> <tel:+49%20234%203222496> (secretary), ...3480 (direct) >>>>>> Fax: +49 234 321 <tel:+49%20234%20321> 4165 Home Office: >>>>>> Brehmestra=C3=9Fe 22, 13187 BERLIN Phone: +49 30 5551 8259 >>>>>> <tel:+49%2030%2055518259> >>>>>> >>>>> >>>> >>>> --=20 >>>> Jens BLAUERT, Dr.-Ing., Dr. Tech. h.c. >>>> Prof. (em.), Acoustics and EE, Ruhr-Universit=C3=A4t Bochum >>>> Prof. (adj.), Architectural Acoustics, RPI, TROY NY >>>> Institute of Communication Acoustics, >>>> Ruhr-Universit=C3=A4t Bochum, D-44780 BOCHUM, Germany >>>> Internet:http://www.rub.de/ika >>>> Phone:+49 234 322 2496 <tel:+49%20234%203222496> (office) >>>> -- >>>> Home office:Brehmestrasse 22, D-13187 BERLIN, Germany >>>> <https://maps.google.com/?q=3DBrehmestrasse+22,+D-13187+BERL= IN,+Germany&entry=3Dgmail&source=3Dg> >>>> Phone:+49 30 5551 8259 <tel:+49%2030%2055518259>, E-mail:jen= s.blauert@xxxxxxxx <mailto:jens.blauert@xxxxxxxx> >>>> >>>> >>> >> >> --=20 >> Jens BLAUERT, Dr.-Ing., Dr. Tech. h.c. >> Prof. (em.), Acoustics and EE, Ruhr-Universit=C3=A4t Bochum >> Prof. (adj.), Architectural Acoustics, RPI, TROY NY >> Institute of Communication Acoustics, >> Ruhr-Universit=C3=A4t Bochum, D-44780 BOCHUM, Germany >> Internet:http://www.rub.de/ika >> Phone:+49 234 322 2496 <tel:+49%20234%203222496> (office) >> -- >> Home office:Brehmestrasse 22, D-13187 BERLIN, Germany >> <https://maps.google.com/?q=3DBrehmestrasse+22,+D-13187+BERLIN= ,+Germany&entry=3Dgmail&source=3Dg> >> Phone:+49 30 5551 8259 <tel:+49%2030%2055518259>, E-mail:jens.= blauert@xxxxxxxx <mailto:jens.blauert@xxxxxxxx> >> >> >> > --------------C739BF42F52B8B53FE95856A Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-MIME-Autoconverted: from 8bit to quoted-printable by edgeum1.it.mcgill.ca id w1QHvh0J017434 <html> <head> <meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dutf= -8"> </head> <body text=3D"#000000" bgcolor=3D"#FFFFFF"> <font face=3D"Calibri">Dick,<br> <br> Sorry -- I did not realize that I was responding not to your idea but to a translation of Jens Blauert's posting. This being the case, what's your opinion about the KEMAR's HRTFs being the only unadulterated ones?<br> <br> Pierre<br> </font><br> <div class=3D"moz-cite-prefix">On 2/25/18 9:39 PM, Richard F. Lyon wrote:<br> </div> <blockquote type=3D"cite" cite=3D"mid:CAA=3DYKqgXueDqo7nKvChqDqtxCShOcn-7ujBm0orMy8r4STh2ag@xxxxxxxx= ail.com"> <div dir=3D"ltr"> <div>Pierre, you're replying to me for what I translated from Blauert.=C2=A0 Please amend.<br> </div> Dick<br> <br> </div> <div class=3D"gmail_extra"><br> <div class=3D"gmail_quote">2018-02-25 21:33 GMT-08:00 PIerre DIVENYI <span dir=3D"ltr"><<a href=3D"mailto:pdivenyi@xxxxxxxx" target=3D"_blan= k" moz-do-not-send=3D"true">pdivenyi@xxxxxxxx</a>>= ;</span>:<br> <blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> <div dir=3D"auto">Dick, <div><br> </div> <div>Reading your very thoughtful analyis the real, I mean =E2=80=9Creal,=E2=80=9D question that comes to mind is wh= at, if any, the use of the many available HRTF databases is, since (as you state) these functions are time varying and even subject to cognitvely induced changes. This being the case, the only reliable HRTFs are those measured in KEMAR, a head the cognitive functions inside which should be negligible.=C2=A0</div> <div><br> </div> <div>Pierre</div> <div><br> <div id=3D"m_-4835756762856322138AppleMailSignature">Sent from my iPad</div> <span class=3D""> <div><br> On Feb 25, 2018, at 19:16, Richard F. Lyon <<a href=3D"mailto:dicklyon@xxxxxxxx" target=3D"_blank" moz-do-not-send=3D"true">dicklyon@xxxxxxxx</a>> wrote:<br> <br> </div> </span> <blockquote type=3D"cite"> <div> <div dir=3D"ltr">Hello Mr. Schoenwiesner -<br> Here are the mails that have come to me. As Dorte Hammershoei rightly notes, the outer ear transmission functions are old hat. In particular, Shaw has contributed much to this. The word "head-related" has long been common and semantically correct in stereophony as opposed to "spatially referenced". The transfer function to the eardrum from a plane wave or the near field of a source are not head related, but are just the transfer functions of the head (together with the upper body). At the time, Geo Plenge had a big problem with Dennis McFadden, who did not want to print his article on Out-of-the-Head Locality. I always suspect nor that Dennis suggested the wrong term HRTf, instead of HTF, which would have been better. Now, the abbreviation HRTF but has introduced worldwide, and especially Americans love handy shortcuts. More interesting today is the question to what extent HRTFs, which presuppose LTI systems, describe the situation with sufficient accuracy. For example, the eardrum impedance is modulation-dependent. This is but u.a. controlled by the middle ear muscle reflex, where even cognitive feedback plays a role. Furthermore, head movements play a major role in current research, with the "HRTFs" being time-varying !! So there is still much to do. I myself have the pure discovers physical aspects of this topic and is currently writing. about feedback in the auditory system. <div> <div class=3D"h5"><br> - With kind regards, Jens Blauert <br> </div> </div> </div> <div> <div class=3D"h5"> <div class=3D"gmail_extra"><br> <div class=3D"gmail_quote">2018-02-20 11:43 GMT-08:00 Pierre Divenyi <span dir=3D"ltr">&l= t;<a href=3D"mailto:pdivenyi@xxxxxxxx" target=3D"_blank" moz-do-not-send=3D"true">pdivenyi@xxxxxxxx= tanford.edu</a>></span>:<br> <blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> <div text=3D"#000000" bgcolor=3D"#FFFFFF"> = <font face=3D"Calibri">Dick,<br> You can do the Google translate this time. It's an interesting mail, also pointing out the impossibility of translating word-by-word between languages.<br> Best,<br> Pierre<br> </font> <div class=3D"m_-4835756762856322138m_-3965985545129144109moz-forward-containe= r"><br> <br> -------- Forwarded Message -------- <table class=3D"m_-4835756762856322138m_-3965985545129144109moz-email-headers-ta= ble" border=3D"0" cellspacing=3D"0" cellpadding=3D"0"> <tbody> <tr> <th valign=3D"BASELINE" align=3D"RIGHT" nowrap=3D"nowra= p">Subject: </th> <td>Re: Who coined the term "head-related transfer function"?</td> </tr> <tr> <th valign=3D"BASELINE" align=3D"RIGHT" nowrap=3D"nowra= p">Date: </th> <td>Tue, 20 Feb 2018 12:01:36 +0100</td> </tr> <tr> <th valign=3D"BASELINE" align=3D"RIGHT" nowrap=3D"nowra= p">From: </th> <td>jens.blauert <a class=3D"m_-4835756762856322138m_-3965985545129144109moz-txt-link-rfc2396= E" href=3D"mailto:jens.blauert@xxxxxxxx" target=3D"_blank" moz-do-not-send=3D"= true"><jens.blauert@xxxxxxxx></a></td> </tr> <tr> <th valign=3D"BASELINE" align=3D"RIGHT" nowrap=3D"nowra= p">To: </th> <td>Marc Schoenwiesner <a class=3D"m_-4835756762856322138m_-3965985545129144109moz-txt-link-rfc2396= E" href=3D"mailto:marc.schoenwiesner@xxxxxxxx" target=3D"_blank" moz-do-not-send=3D"true"><= marc.schoenwiesner@xxxxxxxx></a><wbr>, Jens Blauert <a class=3D"m_-4835756762856322138m_-3965985545129144109moz-txt-link-rfc2396= E" href=3D"mailto:jens.blauert@xxxxxxxx" target=3D"_blank" moz-do-not-send=3D"= true"><jens.blauert@xxxxxxxx></a></td> </tr> </tbody> </table> <br> <br> <div class=3D"m_-4835756762856322138m_-396= 5985545129144109moz-cite-prefix"><br> <b><tt>Hallo Herr Schoenwiesner --</t= t></b><b><tt><br> </tt></b><b><tt>Anbei die Mails, die bei mir eingegangen sind. Wie Dorte Hammershoei richtig bemerkt, sind die Au=C3=9Fenohr- =C3=9Cbertragungsfunktionen ein a= lter Hut. Insbesondere Shaw hat hierzu viel beigetragen. Das Wort "kopfbezogen" ist bei=C2=A0 Stereophonie in Gegensatz zu "raumbezogen"</tt></b><b><tt> </t= t></b><b><tt>seit langen =C3=BCblich und semantisch korrekt. Die =C3=9Cbertragungsfunktion zum=C2=A0 Trommelfell aus einer ebenen Welle oder dem Nahfeld einer Quelle=C2=A0 sind aber nicht kopfbezogen, sondern sind eben die=C2=A0 =C3=9Cbertragunsfunktio= nen des Kopfes (zusammen mit dem Oberk=C3=B6rper). Georg Plenge ha= tte seinerzeit ein gro=C3=9Fes Proble= m mit Dennis=C2=A0 McFadden, der se= inen Artikel zur Au=C3=9Ferhalb-des-Kopfes-Lokalis= ie<wbr>rtheit nicht drucken wollte. Ich vermute immer <br> noch, dass Dennis den falschen Ausdruck HRTf angeregt hat, statt HTF, was besser gewesen w=C3=A4re. Nun hat sich die Abk=C3=BCrzung=C2=A0 HRTF aber we= ltweit eingef=C3=BChrt, und insbesondere Amerikaner lieben griffige Abk=C3=BCrzungen. </tt></b><b><tt= >Interessant ist heute eher die=C2=A0 Frage, inwieweit HRTFs, die ja LTI-Systeme vorausetzen, die Sachlage hinreichend genau beschreiben. Zum Beispiel ist die Trommelfellimpedanz aussteuerungsabh=C3=A4ngig. Diese= ist aber u.a. durch den Mittelohrmuskel-Reflex gesteuert, wo bei dabei sogar kognitives Feedback eine Rolle spielt. Des weiteren spielen in der aktuellen Forschung Kopfbewegungen ein gro=C3=9Fe Rol= le, wobei die "HRTFs" dann zeitvariant sind!! Es ist also noch viel zu tun.=C2=A0 Ich selbs= t habe mich bez=C3=BCglich der rein= =C2=A0 <br> physikalische Aspekte dieses Themas ausgeklinkt und schreibe z.Zt. =C3=BCber Feedback im auditorischen System.</tt></b><b>= <tt> <br> </tt></b><b><tt>-- Mit Gru=C3=9F, I= hr Jens Blauert=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0= =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 = --> Anhang</tt></b><span><b><tt><br> </tt></b><br> Am 19.02.2018 um 12:02 schrieb Marc Schoenwiesner:<br> </span></div> <blockquote type=3D"cite"> <div>Lieber Herr Blauert, <div><br> </div> <div>Bitte leiten Sie die Mail weiter, danke. Meine Suche nach dem Ursprung des Begriffs kommt von einem DFG-Antrag zum Thema an dem ich gerade sitze.</div> <div><br> </div> <div>Viele Gr=C3=BC=C3=9Fe,</div> <div>Ihr Marc Sch=C3=B6nwiesner</di= v> <div><br> </div> <div>PS.: Ich hatte Sie ca. 2001 kurz im Labor in Bochum besucht. Einer Ihrer Studenten gab eine Demonstration der dynamischen Raumschallsimulation. Das wissenschaftliche Interesse am Thema ist geblieben, daher der Antrag.</div> <div><span><br> <div> <div> <div>=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D<br> Vice Dean Dept of Life Sciences</div> <div>Professor =C2=A0of =C2=A0Neurobiology<br> Department of Biology<br> University of Leipzig<br> <a href=3D"https://maps.google.com/?q=3DTalstrasse+33&entry=3Dgmail&= source=3Dg" moz-do-not-send=3D"true= ">Talstrasse 33</a> =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 __o<br> 04103 Leipzig =C2=A0 =C2=A0= =C2=A0 =C2=A0 _`\<,_<br> <a href=3D"tel:+49%20341%2= 09736723" value=3D"+493419736723" target=3D"_blank" moz-do-not-send=3D"true= ">+493419736723</a> =C2=A0 =C2=A0(+) / (+)<br= > & Department of Psychology<br> University =C2=A0of =C2=A0= Montreal<br> Montreal, Quebec, Canada<= br> <a href=3D"http://www.scho= enwiesnerlab.ca/" target=3D"_blank" moz-do-not-send=3D"true= ">www.schoenwiesnerlab.ca</a><br> <a href=3D"http://www.uni-= leipzig.de/%7Eneuro/" target=3D"_blank" moz-do-not-send=3D"true= ">www.uni-leipzig.de/~neuro/</a><br> <a class=3D"m_-4835756762856322138m_-3965985545129144109moz-txt-link-freetex= t" href=3D"http://uni-leipzig.de/%7Eacn/" target=3D"_blank" moz-do-not-send=3D"true= ">http://uni-leipzig.de/~acn/</a><br> =3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D</div> </div> </div> </span> <div><br> <blockquote type=3D"cite"><span= > <div>On 18. Feb 2018, at 12:23, jens.blauert <<= a href=3D"mailto:jens.blauert@xxxxxxxx" target=3D"_blank" moz-do-not-send=3D"= true">jens.blauert@xxxxxxxx</a>> wrote:</div> <br class=3D"m_-4835756762856322138m_-3965985545129144109Apple-interchange-ne= wline"> </span> <div> <div><span> <div class=3D"m_-483575676= 2856322138m_-3965985545129144109moz-cite-prefix"><tt><b>Hallo Herr Sch=C3=B6nwiesner= --</b></tt><tt><b><br> </b></tt><tt><b>Ja, so ist es wohl. Ich habe mich sp=C3=A4ter mal m= it Whiteman & Kistler dar=C3=BC= ber unterhalten, </b>= </tt><tt><b><br> </b></tt><tt><b>das= s HRTR eigentlich semantisch nicht zutrifft. Sie stimmten zu und wir waren uns einig, <br> dass Head-transfer function (HTF) </= b></tt><tt><b>besser w=C3=A4re. Die be= iden haben wohl auch versucht, <br> das den amerikanischen Kollegen zu vermitteln -- aber es war </b><= /tt><tt><b>dann wohl schon zu sp=C3=A4t.</b></t= t><tt><b> </b></tt><tt><b>Wer will <br> der Sache eigentlich jetzt nachgehen? Sind Sie das? Bei mir sind schon mehrere Mails zu dem <br> Thema eingegangen, die Sie m=C3=B6glicherwei= se nicht gesehen haben. Soll ich sie zu Ihnen forwarden?</b></t= t><tt><b><br> </b></tt><tt><b>-- Gru=C3=9F, Ihr Je= ns Blauert</b></tt><= tt><b><br> </b></tt><tt><b><br= > </b></tt><br> m 16.02.2018 um 12:11 schrieb Marc Schoenwiesner:<br> </div> </span> <blockquote type=3D"cite"= > <div><span>Lieber Herr Blauert, <div><br> </div> <div>Im JASA paper von 1972 ("On the differences between localization and lateralization") erw=C3=A4hnt Plen= ge keine HRTF, spricht aber viel =C3=BCber dummy-head transfer functions. K=C3=B6nnte es se= in, dass mit HRTF urspr=C3=BCnglich dummy-head transfer functions gemeint waren?</d= iv> <div><br> </div> <div>Hier das Plenge paper:=C2=A0= <a href=3D"https://pdfs.semanticscholar.org/7e36/c3e7ee73d21efad5cde919fbafc= 21c4f442e.pdf?_ga=3D2.95831066.74002722.1518703463-1062093161.1518703463" target=3D"_blank" moz-do-not-send=3D"true">https://pdfs.semanticsc<wbr>ho= lar.org/7e36/c3e7ee73d21efad<wbr>5cde919fbafc21c4f442e.pdf?_ga=3D<wbr>2.9= 5831066.74002722.<wbr>1518703463-1062093161.<wbr>1518703463</a></div> <div><br> </div> <div>Viele Gr=C3=BC= =C3=9Fe aus Leipzig,</div= > <div>Marc Sch=C3=B6nwiesner= =C2=A0</div> <div><br> </div> </span> <div><span> <div> <div> <div>=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D<br> Vice Dean Dept of Life Sciences</div> <div>Professor =C2=A0of =C2=A0Neurobiol= ogy<br> Department of Biology<br> University of Leipzig<br> <a href=3D"https://maps.google.com/?q=3DTalstrasse+33&entry=3Dgmail&= source=3Dg" moz-do-not-send=3D"true">Talstrasse 33</a> =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 __o<br> 04103 Leipzig =C2=A0 =C2=A0 =C2= =A0 =C2=A0 _`\<,_<br> <a href=3D"tel:+49= %20341%209736723" value=3D"+493419736723" target=3D"_blank" moz-do-not-send=3D"true">+49341= 9736723</a> =C2=A0 =C2=A0(+= ) / (+)<br> & Department of Psychology<br> University =C2=A0= of =C2=A0Montreal<= br> Montreal, Quebec, Canada<= br> <a href=3D"http://= www.schoenwiesnerlab.ca/" target=3D"_blank" moz-do-not-send=3D"true">www.schoenwiesnerlab.ca</a><br= > <a href=3D"http://= www.uni-leipzig.de/%7Eneuro/" target=3D"_blank" moz-do-not-send=3D"true">www.uni-leipzig.de/~neuro/</a>= <br> <a class=3D"m_-4835756762856322138m_-3965985545129144109moz-txt-link-freetex= t" href=3D"http://uni-leipzig.de/%7Eacn/" target=3D"_blank" moz-do-not-send= =3D"true">http://uni-leipzig.de/~acn/</a><br> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D<= /div> </div> </div> </span> <div><br> <blockquote type=3D"cite"><= span> <div>On 16. Feb 2018, at 10:56, Jens Blauert <<a href=3D"mailto:jens.blauert@xxxxxxxx" target=3D"_blank" moz-do-not-send=3D"= true">jens.blauert@xxxxxxxx</a>> wrote:</div> <br class=3D"m_-4835756762856322138m_-3965985545129144109Apple-interchange-ne= wline"> </span> <div> <div> Gru=C3=9F= , Jens Blauert<br= > <div class=3D"m_-4835756762856322138m_-3965985545129144109moz-forward-containe= r"><br> <br> -------- Weitergeleitete Nachricht --------<br> <br> <div class=3D"m_-483= 5756762856322138m_-3965985545129144109moz-cite-prefix"><span><b><tt>Hallo Pierre --</tt><= /b><b><tt><br> </tt></b><b><tt= >Es war Georg Plenge (erlebt noch in Berlin) in einem JASA paper ca. 1972. </tt></b>= <b><tt><br> </tt></b><b><tt= >Wurde von Dennis Mc. Fadden reviewed. Ich hatte in meinem Buch "Au=C3=9Fenohr-= =C3=9Cbertragungsfunktion<wbr>"</tt></b><b><tt><br> </tt></b><b><tt= >(external-ear transfer function) verwendet, aber HRTF hat sich durchgesetzt, obwohl falsch.<= /tt></b><b><tt><br> </tt></b><b><tt= >Was hei=C3=9Ft denn "related"? Es<u= > IST</u></tt></b= ><b><tt> die =C3=9Cbertragun= gsfunktion des Kopfes bzw. Ohres!=C2=A0= <br> Das Plenge-Paper m=C3=BCsste</tt= ></b><b><tt> ich mal raussuchen. Die JASA-B=C3=A4= nde sind in Bochum.<br> Es ging dabei um Im-Kopf-Lokalis= ertheit bei Kunstkopfsignal= en -- oder so =C3=A4hnlich.</= tt></b><b><tt><br> </tt></b><b><tt= >-- Gru=C3=9F, Jens= </tt></b><b><tt><br> </tt></b><br> <br> </span><span> Am 16.02.2018 um 06:28 schrieb Pierre Divenyi:<br> </span></div> <blockquote type=3D"cite"><= span> Dear Jens,<br> <br> You should know the answer to this question by Dick Lyon.<br> <br> Beste Gruesse,<= br> Dein Pierre<br> </span> <div class=3D"m_-4835756762856322138m_-3965985545129144109moz-forward-containe= r"><span><br> <br> -------- Forwarded Message -------- <table class=3D"m_-4835756762856322138m_-3965985545129144109moz-email-headers-ta= ble"> <tbody> <tr> <th nowrap=3D"nowra= p">Subject: </th> <td>Who coined the term "head-related transfer function"?</td> </tr> <tr> <th nowrap=3D"nowra= p">Date: </th> <td>Thu, 15 Feb 2018 15:46:44 +0100<= /td> </tr> <tr> <th nowrap=3D"nowra= p">From: </th> <td>Marc Schoenwiesner <a class=3D"m_-4835756762856322138m_-3965985545129144109moz-txt-link-rfc2396= E" href=3D"mailto:marcs@xxxxxxxx" target=3D"_blank" moz-do-not-send= =3D"true"><marcs@xxxxxxxx></a></td> </tr> <tr> <th nowrap=3D"nowra= p">Reply-To: </th> <td>Marc Schoenwiesner <a class=3D"m_-4835756762856322138m_-3965985545129144109moz-txt-link-rfc2396= E" href=3D"mailto:marcs@xxxxxxxx" target=3D"_blank" moz-do-not-send= =3D"true"><marcs@xxxxxxxx></a></td> </tr> <tr> <th nowrap=3D"nowra= p">To: </th> <td><a class=3D"m_-4835756762856322138m_-3965985545129144109moz-txt-link-abbrevi= ated" href=3D"mailto:AUDITORY@xxxxxxxx" target=3D"_blank" moz-do-not-send= =3D"true">AUDITORY@xxxxxxxx</a></td> </tr> </tbody> </table> <br> <br> </span><span><s= pan>Dear all,</span> <div><br> </div> <div>does anyone know who coined the term=C2=A0"head-related transfer function"? The first mention in a paper = (as far as I have been able to determine) is by Frederic Wightman and Doris Kistler in 1988, but they write: "...the free-field-to-e= ardrum transfer function (sometimes called the head-related transfer function, or HRTF)...", which sounds like there must be an earlier source.</div> <div><br> </div> <div>Best,</div= > <div>Marc</div> <div><br> </div> <div> <div> <div>=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D<br> Vice Dean Dept of Life Sciences</div> <div>Professor =C2=A0of =C2=A0Neurobiol= ogy<br> Department of Biology<br> University of Leipzig<br> <a href=3D"https://maps.google.com/?q=3DTalstrasse+33&entry=3Dgmail&= source=3Dg" moz-do-not-send=3D"true">Talstrasse 33</a> =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 __o<br> 04103 Leipzig =C2=A0 =C2=A0 =C2= =A0 =C2=A0 _`\<,_<br> <a href=3D"tel:+49= %20341%209736723" value=3D"+493419736723" target=3D"_blank" moz-do-not-send=3D"true">+49341= 9736723</a> =C2=A0 =C2=A0(+= ) / (+)<br> & Department of Psychology<br> University =C2=A0= of =C2=A0Montreal<= br> Montreal, Quebec, Canada<= br> <a href=3D"http://= www.schoenwiesnerlab.ca/" target=3D"_blank" moz-do-not-send=3D"true">www.schoenwiesnerlab.ca</a><br= > <a class=3D"m_-4835756762856322138m_-3965985545129144109moz-txt-link-abbrevi= ated" href=3D"http://www.uni-leipzig.de/%7Eneuro/" target=3D"_blank" moz-do-not-send= =3D"true">www.uni-leipzig.de/~neuro/</a><br> <a class=3D"m_-4835756762856322138m_-3965985545129144109moz-txt-link-freetex= t" href=3D"http://uni-leipzig.de/%7Eacn/" target=3D"_blank" moz-do-not-send= =3D"true">http://uni-leipzig.de/~acn/</a><br> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D<= /div> </div> </div> <br> </span></div> </blockquote> <span> -- Jens BLAUERT, Dr.-Ing., Dr. Tech. h.c. Prof. (em.), Acoustics and EE, Ruhr-Universit=C3= =A4t Bochum Prof. (adj.), Architectural Acoustics, RPI, Troy NY Postal address: Institute of Communication Acoustics, Ruhr-Universit=C3= =A4t Bochum, D-44780 Bochum, Germany E-mail: <a class=3D"m_-4835756762856322138m_-3965985545129144109moz-txt-link-abbrevi= ated" href=3D"mailto:jens.blauert@xxxxxxxx" target=3D"_blank" moz-do-not-send=3D"= true">jens.blauert@xxxxxxxx</a> Internet: <a class=3D"m_-4835756762856322138m_-3965985545129144109moz-txt-link-freetex= t" href=3D"http://www.rub.de/ika" target=3D"_blank" moz-do-not-send=3D"true"= >http://www.rub.de/ika</a> Phone: <a href=3D"tel:+49= %20234%203222496" value=3D"+492343222496" target=3D"_blank" moz-do-not-send=3D"true">+49 23= 4 322 2496</a> (secretary), ...3480 (direct) Fax: <a href=3D"tel:+49= %20234%20321" value=3D"+49234321" target=3D"_blank" moz-do-not-send=3D"true">+49 234 32= 1</a> 4165 Home Office: Brehmestra=C3=9F= e 22, 13187 BERLIN Phone: <a href=3D"tel:+49= %2030%2055518259" value=3D"+493055518259" target=3D"_blank" moz-do-not-send=3D"true">+49 30= 5551 8259</a> <br> </span></div> <br> </div> </div> </blockquote> </div> <br> </div> </div> </blockquote> <span> <p><br> </p> <pre class=3D"m_-483575= 6762856322138m_-3965985545129144109moz-signature" cols=3D"72">--=20 Jens BLAUERT, Dr.-Ing., Dr. Tech. h.c. Prof. (em.), Acoustics and EE, Ruhr-Universit=C3=A4t Bochum Prof. (adj.), Architectural Acoustics, RPI, TROY NY Institute of Communication Acoustics, Ruhr-Universit=C3=A4t Bochum, D-44780 BOCHUM, Germany Internet: <a class=3D"m_-4835756762856322138m_-3965985545129144109moz-txt= -link-freetext" href=3D"http://www.rub.de/ika" target=3D"_blank" moz-do-n= ot-send=3D"true">http://www.rub.de/ika</a> Phone: <a href=3D"tel:+49%20234%203222496" value=3D"+492343222496" target= =3D"_blank" moz-do-not-send=3D"true">+49 234 322 2496</a> (office) -- Home office: <a href=3D"https://maps.google.com/?q=3DBrehmestrasse+22,+D-= 13187+BERLIN,+Germany&entry=3Dgmail&source=3Dg" moz-do-not-send=3D= "true">Brehmestrasse 22, D-13187 BERLIN, Germany</a> Phone: <a href=3D"tel:+49%2030%2055518259" value=3D"+493055518259" target= =3D"_blank" moz-do-not-send=3D"true">+49 30 5551 8259</a>, E-mail: <a cla= ss=3D"m_-4835756762856322138m_-3965985545129144109moz-txt-link-abbreviate= d" href=3D"mailto:jens.blauert@xxxxxxxx" target=3D"_blank" moz-do-not-send=3D= "true">jens.blauert@xxxxxxxx</a> </pre> </span></div> </div> </blockquote> </div> <br> </div> </div> </blockquote> <span> <p><br> </p> <pre class=3D"m_-4835756762856322138m= _-3965985545129144109moz-signature" cols=3D"72">--=20 Jens BLAUERT, Dr.-Ing., Dr. Tech. h.c. Prof. (em.), Acoustics and EE, Ruhr-Universit=C3=A4t Bochum Prof. (adj.), Architectural Acoustics, RPI, TROY NY Institute of Communication Acoustics, Ruhr-Universit=C3=A4t Bochum, D-44780 BOCHUM, Germany Internet: <a class=3D"m_-4835756762856322138m_-3965985545129144109moz-txt= -link-freetext" href=3D"http://www.rub.de/ika" target=3D"_blank" moz-do-n= ot-send=3D"true">http://www.rub.de/ika</a> Phone: <a href=3D"tel:+49%20234%203222496" value=3D"+492343222496" target= =3D"_blank" moz-do-not-send=3D"true">+49 234 322 2496</a> (office) -- Home office: <a href=3D"https://maps.google.com/?q=3DBrehmestrasse+22,+D-= 13187+BERLIN,+Germany&entry=3Dgmail&source=3Dg" moz-do-not-send=3D= "true">Brehmestrasse 22, D-13187 BERLIN, Germany</a> Phone: <a href=3D"tel:+49%2030%2055518259" value=3D"+493055518259" target= =3D"_blank" moz-do-not-send=3D"true">+49 30 5551 8259</a>, E-mail: <a cla= ss=3D"m_-4835756762856322138m_-3965985545129144109moz-txt-link-abbreviate= d" href=3D"mailto:jens.blauert@xxxxxxxx" target=3D"_blank" moz-do-not-send=3D= "true">jens.blauert@xxxxxxxx</a> </pre> </span></div> </div> </blockquote> </div> <br> </div> </div> </div> </div> </blockquote> </div> </div> </blockquote> </div> <br> </div> </blockquote> <br> </body> </html> --------------C739BF42F52B8B53FE95856A--