Subject: Re: [AUDITORY] Lyon hearing book: free PDF now updated and announced to the public From: Diego Martinez <diegomarti@xxxxxxxx> Date: Wed, 3 Jan 2018 08:05:17 -0300 List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY>--94eb2c0b739030f8f90561dd334b Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable This is great news. Thank you very much Richard for letting us know and for making your book available for free public access. I will share the link with my fellow sound technicians here in Argentina. Best wishes for 2018. 2018-01-02 19:33 GMT-03:00 Richard F. Lyon <dicklyon@xxxxxxxx>: > I've made a 2018 version of my book with all the 2017 errata corrected, > and announced the free PDF on my blog site http://www.machinehearing.org/ > > And I deleted the robots.txt file that asked crawlers not to index it, so > it should show up in web searches eventually, too. > > Actually, there's one more error that I've been discussing with Volker > Hohmann, but can't easily fix with tiny edits: some of the things I said > about discrete-time gammatones and impulse-invariance and > pole-zero-matching methods are not quite right. Probably I'll try to > explain this in a blog post, in case anywhere cares for such subtleties. > In particular, it means that Angela Darling's discrete-time gammatone > implementation does not have an impulse response that is exactly a sample= d > version of the continuous-time gammatone, at least for orders greater tha= n > 2. Hohmann settled on Darling's method (before knowing of it) as an > excellent approximation, while I had mistakenly claimed it was exact. > Darling had said "A digital IIR filter is designed using the impulse > invariance method to implement the Gamma Tone filter...", which was true, > sort of, but her approach was to apply the impulse invariance method to t= he > cascaded stage filter, not to the overall filter, and I had failed to > appreciate the subtle difference, which showed up when Hohmann applied > impulse invariance correctly to the complete gammatone. > > Dick > > --=20 >>>>>>>>>Diego>>>> *Aviso de privacidad y confidencialidad:* La informaci=C3=B3n contenida en = este mensaje de correo electr=C3=B3nico es =C3=BAnicamente para los destinatario= s a los que est=C3=A1 directamente dirigido. El mensaje puede contener informaci=C3= =B3n privilegiada y confidencial. Si usted no es el destinatario no debe copiar, distribuir ni realizar ninguna acci=C3=B3n relacionada con este mensaje y s= u contenido. Si usted ha recibido este correo por error, le agradecer=C3=A9 m= e notifique de inmediato. Gracias por su ayuda. *Privacy and Confidentiality** Notice:* The information contained in this e-mail is intended for the named recipient(s) only. It may contain privileged and confidential information. If you are not an intended recipient, you must not copy, distribute or take any action in reliance on it. If you have received this e-mail in error, I would be grateful if you would notify me immediately. Thank you for your assistance. --94eb2c0b739030f8f90561dd334b Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable <div dir=3D"ltr">This is great news. Thank you very much Richard for lettin= g us know and for making your book available for free public access.<div><b= r></div><div>I will share the link with my fellow sound technicians here in= Argentina.</div><div><br></div><div>Best wishes for 2018.</div></div><div = class=3D"gmail_extra"><br><div class=3D"gmail_quote">2018-01-02 19:33 GMT-0= 3:00 Richard F. Lyon <span dir=3D"ltr"><<a href=3D"mailto:dicklyon@xxxxxxxx= rg" target=3D"_blank">dicklyon@xxxxxxxx</a>></span>:<br><blockquote class= =3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padd= ing-left:1ex"><div dir=3D"ltr"><div><div>I've made a 2018 version of my= book with all the 2017 errata corrected, and announced the free PDF on my = blog site <a href=3D"http://www.machinehearing.org/" target=3D"_blank">http= ://www.machinehearing.org/</a><br><br></div>And I deleted the robots.txt fi= le that asked crawlers not to index it, so it should show up in web searche= s eventually, too.</div><div><br></div><div>Actually, there's one more = error that I've been discussing with Volker Hohmann, but can't easi= ly fix with tiny edits:=C2=A0 some of the things I said about discrete-time= gammatones and impulse-invariance and pole-zero-matching methods are not q= uite right.=C2=A0 Probably I'll try to explain this in a blog post, in = case anywhere cares for such subtleties.=C2=A0 In particular, it means that= Angela Darling's discrete-time gammatone implementation does not have = an impulse response that is exactly a sampled version of the continuous-tim= e gammatone, at least for orders greater than 2.=C2=A0 Hohmann settled on D= arling's method (before knowing of it) as an excellent approximation, w= hile I had mistakenly claimed it was exact.=C2=A0 Darling had said "A = digital IIR filter is designed using the impulse invariance method to imple= ment the Gamma Tone filter...", which was true, sort of, but her appro= ach was to apply the impulse invariance method to the cascaded stage filter= , not to the overall filter, and I had failed to appreciate the subtle diff= erence, which showed up when Hohmann applied impulse invariance correctly t= o the complete gammatone.<br></div><div><br></div>Dick<br><br></div> </blockquote></div><br><br clear=3D"all"><div><br></div>-- <br><div class= =3D"gmail_signature" data-smartmail=3D"gmail_signature"><div dir=3D"ltr"><d= iv><div dir=3D"ltr"><div dir=3D"ltr"><div dir=3D"ltr"><div><span style=3D"c= olor:rgb(51,51,255)"><br></span></div><div><span style=3D"font-size:12.8000= 001907349px">>>>>>>>>>Diego>>>></spa= n><span style=3D"color:rgb(51,51,255)"><br></span></div><div><span style=3D= "font-size:12.8000001907349px"><br></span></div><div><div style=3D"font-siz= e:small"><font color=3D"#e69138"><b><span style=3D"font-size:12.80000019073= 49px">Aviso de p</span>rivacidad y confidencialidad:</b>=C2=A0La informaci= =C3=B3n contenida en este mensaje de correo electr=C3=B3nico es =C3=BAnicam= ente para los destinatarios a los que est=C3=A1 directamente dirigido. El m= ensaje puede contener informaci=C3=B3n privilegiada y confidencial. Si uste= d no es el destinatario no debe copiar, distribuir ni realizar ninguna acci= =C3=B3n relacionada con este mensaje y su contenido. Si usted ha recibido e= ste correo por error, le agradecer=C3=A9 me notifique de inmediato. Gracias= por su ayuda.</font></div><div style=3D"font-size:small"><span style=3D"co= lor:rgb(51,51,255)"><br></span></div><div style=3D"font-size:small"><b styl= e=3D"font-size:12.8000001907349px"><span style=3D"color:rgb(51,51,255)">Pri= vacy and=C2=A0</span><span style=3D"color:rgb(51,51,255)">Confidentiality</= span></b><span style=3D"font-size:12.8000001907349px;color:rgb(51,51,255)">= <b>=C2=A0Notice:</b>=C2=A0The information contained in this e-mail is inten= ded for the named recipient(s) only. It may contain privileged and confiden= tial information.=C2=A0 If you are not an intended recipient, you must not = copy, distribute or take any action in reliance on it. If you have received= this e-mail in error, I would be grateful if you would notify me immediate= ly. Thank you for your assistance.</span></div></div><div><div><br></div><b= r></div></div></div></div></div></div></div> </div> --94eb2c0b739030f8f90561dd334b--