Re: [AUDITORY] Seeking advice on improving localization clarity in static binaural playback with non-individualized HRTFs (Brian FG Katz )

Subject: Re: [AUDITORY] Seeking advice on improving localization clarity in static binaural playback with non-individualized HRTFs From: Brian FG Katz <brian.katz@xxxxxxxx> Date: Fri, 8 Aug 2025 08:38:30 +0200 This is a multipart message in MIME format. ------=_NextPart_000_1E62_01DC083F.D2197D80 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hello Dingding,=20 =20 There are various elements which improve static binaural rendering. = Rather than repeat the various elements here, I invite you to check some = more of the literature, such as the chapter that Rozenn and I wrote for = this book :=20 =20 B. F. G. Katz and R. Nicol, =E2=80=9CBinaural spatial = reproduction,=E2=80=9D in Sensory Evaluation of Sound (N. Zacharov, = ed.), pp. 349=E2=80=93388, Boca Raton: CRC Press, 2019, = <http://www.crcpress.com/Sensory-Evaluation-of-Sound/Zacharov/p/book/9781= 498751360> (url). ISBN 978-1-4987-5136-0. =20 I can also say (as another element of small self-promotion) we have = incorporated many if the techniques in our free binaural VST plug-in = (http://anaglyph.dalembert.upmc.fr/) with this goal in mind. I invite = you to try it out.=20 =20 From your text, I have the impression that you distinguish between = =E2=80=9Cclearly and reliable=E2=80=9D responses (repeatability of = subjects) as being distinct from the actual desired rendering location. = This is not really compatible with your following goal of distinguish = between front and back, as well as between above and below, unless you = mean in their personal remapping of the perceived HRTF space. So, are = you looking for =E2=80=9Creliable=E2=80=9D or =E2=80=9Ccorrect=E2=80=9D? = This is not exactly clear in your statements.=20 =20 Best of luck, -Brian -- Brian FG Katz, Research Director, CNRS Groupe Lutheries - Acoustique =E2=80=93 Musique Sorbonne Universit=C3=A9, CNRS, UMR 7190, Institut Jean Le Rond = =E2=88=82'Alembert=20 <http://www.dalembert.upmc.fr/home/katz> = http://www.dalembert.upmc.fr/home/katz =20 De : AUDITORY - Research in Auditory Perception = <AUDITORY@xxxxxxxx> De la part de Dingding Yao Envoy=C3=A9 : jeudi 7 ao=C3=BBt 2025 08:41 =C3=80 : AUDITORY@xxxxxxxx Objet : [AUDITORY] Seeking advice on improving localization clarity in = static binaural playback with non-individualized HRTFs =20 Dear list, I hope this message finds you well. =20 I am reaching out to seek your advice on a question related to binaural = reproduction. As we all know, localization = ambiguities=E2=80=94especially front-back and up-down = confusions=E2=80=94are a common challenge when using HRTF-based binaural = playback. Previous literature has pointed out several influencing = factors, such as dynamic cues (e.g., head rotation), individualized = HRTFs, and headphone equalization. =20 However, I am particularly interested in whether it is still possible to = achieve a clear sense of directional perception under static listening = conditions with non-individualized HRTFs. Specifically, even if precise = localization is not attained, might there be techniques or strategies = that allow listeners to clearly and reliably distinguish between front = and back, as well as between above and below? Any insights, relevant experiences, or useful references would be = greatly appreciated. I would also welcome any discussion or perspectives = on this topic.=20 Best regards, =20 Dingding Yao ------=_NextPart_000_1E62_01DC083F.D2197D80 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable <html xmlns:v=3D"urn:schemas-microsoft-com:vml" = xmlns:o=3D"urn:schemas-microsoft-com:office:office" = xmlns:w=3D"urn:schemas-microsoft-com:office:word" = xmlns:x=3D"urn:schemas-microsoft-com:office:excel" = xmlns:m=3D"http://schemas.microsoft.com/office/2004/12/omml" = xmlns=3D"http://www.w3.org/TR/REC-html40"><head><meta = http-equiv=3DContent-Type content=3D"text/html; charset=3Dutf-8"><meta = name=3DGenerator content=3D"Microsoft Word 15 (filtered = medium)"><style></style></head><body lang=3DEN-GB link=3D"#0563C1" vlink=3D"#954F72" = style=3D'word-wrap:break-word'><div class=3DWordSection1>Hello = Dingding, <o:p></o:p><o:p> </o:p>There are = various elements which improve static binaural rendering. Rather than = repeat the various elements here, I invite you to check some more of the = literature, such as the chapter that Rozenn and I wrote for this book : = <o:p></o:p><o:p> </o:p>B.&= nbsp;F. G. Katz and R. Nicol, =E2=80=9CBinaural spatial = reproduction,=E2=80=9D in Sensory Evaluation of = Sound (N. Zacharov, ed.), pp. 349=E2=80=93388, = Boca Raton: CRC Press, 2019, <a = href=3D"http://www.crcpress.com/Sensory-Evaluation-of-Sound/Zacharov/p/bo= ok/9781498751360">(url)</a= >. = ISBN 978-1-4987-5136-0.<o:p></o:p><o:p> </o:p>I can also = say (as another element of small self-promotion) we have incorporated = many if the techniques in our free binaural VST plug-in (<a = href=3D"http://anaglyph.dalembert.upmc.fr/">http://anaglyph.dalembert.upm= c.fr/</a>) with this goal in mind. I invite you to try it out. = <o:p></o:p><o:p> </o:p>From your = text, I have the impression that you distinguish between = =E2=80=9Cclearly and reliable=E2=80=9D responses (repeatability of = subjects) as being distinct from the actual desired rendering location. = This is not really compatible with your following goal of = distinguish between front and back, as well as between above and = below, unless you mean in their personal remapping of the perceived HRTF = space. So, are you looking for =E2=80=9Creliable=E2=80=9D or = =E2=80=9Ccorrect=E2=80=9D? This is not exactly clear in your statements. = <o:p></o:p><o:p> </o:p>Best of = luck,<o:p></o:p>-Brian<o:p></o:p>--<o:p></o:p>Brian FG Katz, Research = Director, CNRS<o:p></o:p>Groupe Lutheries - Acoustique = =E2=80=93 Musique<o:p></o:p>Sorbonne Universit=C3=A9, CNRS, = UMR 7190, Institut Jean Le Rond =E2=88=82'Alembert <o:p></o:p><a = href=3D"http://www.dalembert.upmc.fr/home/katz">http://www.dalembert.upmc.fr/home/katz</a></s= pan><o:p></o:p><o:p> </o:p><div = style=3D'border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm = 0cm 0cm'>De : AUDITORY - Research in = Auditory Perception <AUDITORY@xxxxxxxx> De la part = de Dingding Yao Envoy=C3=A9 : jeudi 7 ao=C3=BBt 2025 = 08:41 =C3=80 : = AUDITORY@xxxxxxxx Objet : [AUDITORY] Seeking = advice on improving localization clarity in static binaural playback = with non-individualized HRTFs<o:p></o:p></div><o:p> </o:p><div>Dear list,<o:p></o:p><div>I hope this message finds you = well.<o:p></o:p><div><o:p> </o:p></div><div>I = am reaching out to seek your advice on a question related to binaural = reproduction. As we all know, localization = ambiguities=E2=80=94especially front-back and up-down = confusions=E2=80=94are a common challenge when using HRTF-based binaural = playback. Previous literature has pointed out several influencing = factors, such as dynamic cues (e.g., head rotation), individualized = HRTFs, and headphone equalization.<o:p></o:p></div><div><o:p> </o:p></div><div>However, I am particularly interested in whether it is = still possible to achieve a clear sense of directional perception = under static listening conditions with non-individualized = HRTFs. Specifically, even if precise localization is not attained, = might there be techniques or strategies that allow listeners to = clearly and reliably distinguish between front and back, as well = as between above and below? Any insights, relevant experiences, = or useful references would be greatly appreciated. I would also welcome = any discussion or perspectives on this topic. Best regards, =   Dingding = Yao<o:p></o:p></div></div></div></div></body></html> ------=_NextPart_000_1E62_01DC083F.D2197D80--

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