Subject: Re: Frequency dependecy of sound localization From: "Richard F. Lyon" <dicklyon@xxxxxxxx> Date: Sat, 5 Apr 2014 11:52:09 -0700 List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY>--20cf305b0abcaad26704f6502166 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable An important complication in all of these is the choice of stimulus. Macpherson and Middlebrooks investigate effects of suppressing or enhancing the envelope ITD cue, which is an important part of what gets used at high frequencies. Studies that only use tones or bandpass filtered steady noises naturally find much lower weights on high-frequency ITD, since there's less there to go on. Some studies look at maximally impulsive stimuli, such as filtered random click trains or such, where high-frequency ITD can be more robustly informative. But I don't know if they have investigated spectral weighting of ITD and ILD for such sounds. The abstract of this one looks relevant: Auditory Localization of Clicks Bruce H. Deatherage and Ira J. Hirsh http://scitation.aip.org/content/asa/journal/jasa/31/4/10.1121/1.1907740 Dick On Fri, Apr 4, 2014 at 3:15 AM, Axel Ahrens <ahrens.axel@xxxxxxxx> wrote: > Dear Jungfeng, Dear list, > > we are currently working on spectral weighting of spatial cues. You might > be interested in some publications I read: > > > -Stern, M., & Zeiberg, S. (1988). Lateralization of complex binaural > stimuli: A weighted-image model. *Journal of the Acoustical Society of > America*, *1*, 156=E2=80=93165. > > which is partly based on Raatgevers doctoral dissertation from 1980. > > -Macpherson, E. A., & Middlebrooks, J. C. (2002). Listener weighting of > cues for lateral angle: The duplex theory of sound localization revisited= . *The > Journal of the Acoustical Society of America*, *111*(5), 2219. > doi:10.1121/1.1471898 > > -Le Goff, N., Buchholz, J. M., & Dau, T. (2013). SPECTRAL INTEGRATION OF > INTERAURAL TIME DIFFERENCES IN AUDITORY LOCALIZATION. *International > Congress on Acoustics*. Montr=C3=A9al. (Poster) > > -Buell, T. N., & Hafter, E. R. (1991). Combination of binaural informatio= n > across frequency bands. *The Journal of the Acoustical Society of America= *, > *90*(4 Pt 1), 1894=E2=80=93900. > > Our own current work is still in an early stage and not published yet. If > you need any further information do not hesitate to contact me. > > > Best, > Axel Ahrens > Technical University of Denmark > > -- > > > > > > > Kind regards / Mit freundlichen Gr=C3=83=C2=BC=C3=83=C5=B8en > > Axel Ahrens > > Daugaardsvej 2 > > 2800 Kongens Lyngby > > Denmark > > +45 60 52 67 70 <#145303d2d3357715_> <#145303d2d3357715_> > > <#145303d2d3357715_> > > > > > > > 2014-04-03 11:03 GMT+02:00 Li Junfeng <junfeng@xxxxxxxx>: > > Dear all, >> >> >> As all of you may know, human sound localization is a quite complex >> procedure and highly dependent on the ITD, ILD, spectral cues and others= . >> All these cues are encoded in HRTF. Many previous studies have shown tha= t >> for horizontal sound localization, ITD play a important role in the low >> frequencies and ILD is dominant cue in the high frequencies; for vertica= l >> sound localization, spectral cues in the high frequencies are normally >> important. Thess are already known knowledge. >> >> From the previous research results, I beleive that different frequencies >> should contribute differently to horizontal and vertical sound >> localization. Furthermore, I am now wondering how we can quantify this >> difference, that is, is there a quantitative way to describe the differe= nt >> contribution of different frequencies to sound localization. (As you may >> know, in speech perception field, the band-importance functions quantify >> the contribution of different frequencies to speech intelligibility). I = am >> also looking for the frequency/band-imporance functions which describe t= he >> contribution of different frequencies to human sound localization. >> >> Does anyone know some work on this research to recommend or some ideas t= o >> share? >> >> I would like to appreciate any discussions and references very much. >> >> Thanks a lot. >> >> Best regards, >> Junfeng >> > > --20cf305b0abcaad26704f6502166 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable <div dir=3D"ltr"><div>An important complication in all of these is the choi= ce of stimulus.=C2=A0 Macpherson and Middlebrooks investigate effects of su= ppressing or enhancing the envelope ITD cue, which is an important part of = what gets used at high frequencies.=C2=A0 Studies that only use tones or ba= ndpass filtered steady noises naturally find much lower weights on high-fre= quency ITD, since there's less there to go on.<br> <br></div>Some studies look at maximally impulsive stimuli, such as filtere= d random click trains or such, where high-frequency ITD can be more robustl= y informative.=C2=A0 But I don't know if they have investigated spectra= l weighting of ITD and ILD for such sounds.=C2=A0 The abstract of this one = looks relevant:<br> Auditory Localization of Clicks<br>Bruce H. Deatherage and Ira J. Hirsh<br>= <a href=3D"http://scitation.aip.org/content/asa/journal/jasa/31/4/10.1121/1= .1907740">http://scitation.aip.org/content/asa/journal/jasa/31/4/10.1121/1.= 1907740</a><br> <br>Dick<br><br></div><div class=3D"gmail_extra"><br><br><div class=3D"gmai= l_quote">On Fri, Apr 4, 2014 at 3:15 AM, Axel Ahrens <span dir=3D"ltr"><= <a href=3D"mailto:ahrens.axel@xxxxxxxx" target=3D"_blank">ahrens.axel@xxxxxxxx= l.com</a>></span> wrote:<br> <blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p= x #ccc solid;padding-left:1ex"><div dir=3D"ltr"><div>Dear Jungfeng, Dear li= st,</div><div>=C2=A0</div><div>we are=C2=A0currently working on spectral we= ighting of spatial cues. You might be interested in some publications I rea= d:</div> <div>=C2=A0</div><div><p style=3D"margin-left:24pt"> -Stern, M., & Zeiberg, S. (1988). Lateralization of complex binaural st= imuli: A weighted-image model. <i>Journal of the Acoustical Society of Amer= ica</i>, <i>1</i>, 156=E2=80=93165.</p><p style=3D"margin-left:24pt">which = is partly based on Raatgevers doctoral dissertation from 1980.</p> <p style=3D"margin-left:24pt">-Macpherson, E. A., & Middlebrooks, J. C.= (2002). Listener weighting of cues for lateral angle: The duplex theory of= sound localization revisited. <i>The Journal of the Acoustical Society of = America</i>, <i>111</i>(5), 2219. doi:10.1121/1.1471898</p> <p style=3D"margin-left:24pt">-Le Goff, N., Buchholz, J. M., & Dau, T. = (2013). SPECTRAL INTEGRATION OF INTERAURAL TIME DIFFERENCES IN AUDITORY LOC= ALIZATION. <i>International Congress on Acoustics</i>. Montr=C3=A9al. (Post= er)</p> <p style=3D"margin-left:24pt">-Buell, T. N., & Hafter, E. R. (1991). Co= mbination of binaural information across frequency bands. <i>The Journal of= the Acoustical Society of America</i>, <i>90</i>(4 Pt 1), 1894=E2=80=93900= .</p> </div> <div>=C2=A0</div><div>Our own current work is still in an early stage and n= ot published yet. If you need any further information do not hesitate to co= ntact me.</div><div>=C2=A0</div><div>=C2=A0</div><div>Best,</div><div>Axel = Ahrens</div> <div> Technical University of Denmark</div><div>=C2=A0</div><div>--</div><div>=C2= =A0</div><div>=C2=A0</div><div>=C2=A0</div><div>=C2=A0</div><div>=C2=A0</di= v><div><p>Kind regards / Mit freundlichen Gr=C3=83=C2=BC=C3=83=C5=B8en</p> <p>Axel Ahrens</p> <p>Daugaardsvej 2</p> <p>2800 Kongens Lyngby</p> <p>Denmark</p> <p><span style=3D"white-space:nowrap"><a href=3D"tel:%2B45%2060%2052%2067%2= 070" value=3D"+4560526770" target=3D"_blank">+45 60 52 67 70</a><a style=3D= "margin:0px;border:currentColor;width:16px;min-height:16px;overflow:hidden;= vertical-align:middle;float:none;display:inline;white-space:nowrap" title= =3D"Call: +45 60 52 67 70" href=3D"#145303d2d3357715_"><img style=3D"margin= :0px;border:currentColor;width:16px;min-height:16px;overflow:hidden;vertica= l-align:middle;float:none;display:inline;white-space:nowrap" title=3D"Call:= +45 60 52 67 70"></a></span><a href=3D"#145303d2d3357715_"></a></p> <p><a href=3D"#145303d2d3357715_"></a></p> </div><div><p style=3D"margin-left:24pt">=C2=A0</p><p style=3D"margin-left:= 24pt">=C2=A0</p> </div><div class=3D"gmail_extra"><br><br><div class=3D"gmail_quote">2014-04= -03 11:03 GMT+02:00 Li Junfeng <span dir=3D"ltr"><<a href=3D"mailto:junf= eng@xxxxxxxx" target=3D"_blank">junfeng@xxxxxxxx</a>></span>:<div = class=3D""> <br><blockquote style=3D"margin:0px 0px 0px 0.8ex;padding-left:1ex;border-l= eft-color:rgb(204,204,204);border-left-width:1px;border-left-style:solid" c= lass=3D"gmail_quote"> Dear all,<br> <br> <br> As all of you may know, human sound localization is a quite complex procedu= re and highly dependent on the ITD, ILD, spectral cues and others. All thes= e cues are encoded in HRTF. Many previous studies have shown that for horiz= ontal sound localization, ITD play a important role in the low frequencies = and ILD is dominant cue in the high frequencies; for vertical sound localiz= ation, spectral cues in the high frequencies are normally important. Thess = are already known knowledge.<br> <br> >From the previous research results, I beleive that different frequencies sh= ould contribute differently to horizontal and vertical sound localization. = Furthermore, I am now wondering how we can quantify this difference, that i= s, is there a quantitative way to describe the different contribution of di= fferent frequencies to sound localization. (As you may know, in speech perc= eption field, the band-importance functions quantify the contribution of di= fferent frequencies to speech intelligibility). I am also looking for the f= requency/band-imporance functions which describe the contribution of differ= ent frequencies to human sound localization.<br> <br> Does anyone know some work on this research to recommend or some ideas to s= hare?<br> <br> I would like to appreciate any discussions and references very much.<br> <br> Thanks a lot.<br> <br> Best regards,<br> Junfeng<br> </blockquote></div></div><div dir=3D"ltr"><div><p><span lang=3D"DE"><span s= tyle=3D"white-space:nowrap"></span></span>=C2=A0</p></div></div> </div></div> </blockquote></div><br></div> --20cf305b0abcaad26704f6502166--