Re: [AUDITORY] Number of critical bands in human hearing? (Pierre Divenyi )

Subject: Re: [AUDITORY] Number of critical bands in human hearing? From: Pierre Divenyi <pdivenyi@xxxxxxxx> Date: Wed, 13 Sep 2023 22:57:32 -0700 --Apple-Mail-F42B6EED-FFA0-4277-A6E2-FE88E52EE3C4 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable And if a number of colleagues disagree with what you are saying, those are a= lso a critical band. Pierre Pardon my typos. It's Apple's fault.=20 > On Sep 13, 2023, at 22:49, Richard F. Lyon <dicklyon@xxxxxxxx> wrote: >=20 > =EF=BB=BF > I think critical bands are not discrete countable things. > But if you want to divide up the range of 20 Hz to 20 kHz into CB-size ban= ds, then there should be an answer, though it will be more at low sound leve= ls than at high sound levels. 24 sounds plausible for moderate sound level.= If you count ERBs at low level, you'll get more than that, maybe about 40.= > Dick >=20 >=20 >> On Wed, Sep 13, 2023 at 9:14=E2=80=AFPM David Jackson Morris <dmorris@xxxxxxxx= .ku.dk> wrote: >> Dear all, >>=20 >> =20 >>=20 >> In teaching an undergrad course on hearing science the students have aske= d, how many critical bands are there in normal healthy hearing? The text tha= t we use says that there are 24. If I ask ChatGPT it also cites Fletcher a= nd Munson=E2=80=99s estimation of 24, but what would it know. . . =20 >>=20 >> =20 >>=20 >> Am I right in suspecting that this may have been revised upwards at some s= tage (?). Is the collective wisdom of the list able to help with this or po= int to an authoritative source?=20 >>=20 >> =20 >>=20 >> Cheers >>=20 >> David >>=20 >> =20 >>=20 >> =20 >>=20 >> David Jackson Morris, PhD, LTCL >>=20 >> Associate Professor/Lektor >>=20 >> =20 >>=20 >> University of Copenhagen/K=C3=B8benhavns Universitet >>=20 >> Speech Pathology and Audiology/Audiologop=C3=A6di >>=20 >> Department of Nordic Studies and Linguistics/Institut for Nordiske Studie= r og Sprogvidenskab >>=20 >> Emil Holms Kanal 2 >>=20 >> 2300 Copenhagen S/K=C3=B8benhavn S >>=20 >> =20 >>=20 >> Department Homepage >>=20 >> =20 >>=20 >> =20 >>=20 >> - >>=20 >> =20 >>=20 >> S=C3=A5dan beskytter vi persondata >>=20 >> =20 >>=20 >> =20 --Apple-Mail-F42B6EED-FFA0-4277-A6E2-FE88E52EE3C4 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable <html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D= utf-8"></head><body dir=3D"auto">And if a number of colleagues disagree with= what you are saying, those are also a critical band.<div>Pierre <div= dir=3D"ltr">Pardon my typos. It's Apple's fault. </div><div dir=3D"ltr= "> <blockquote type=3D"cite">On Sep 13, 2023, at 22:49, Richard F. Lyon &= lt;dicklyon@xxxxxxxx> wrote: </blockquote></div><blockquote type=3D= "cite"><div dir=3D"ltr">=EF=BB=BF<div dir=3D"ltr"><div class=3D"gmail_defaul= t" style=3D"font-size:small">I think critical bands are not discrete countab= le things.</div><div class=3D"gmail_default" style=3D"font-size:small">But i= f you want to divide up the range of 20 Hz to 20 kHz into CB-size bands, the= n there should be an answer, though it will be more at low sound levels than= at high sound levels.  24 sounds plausible for moderate sound level.&n= bsp; If you count ERBs at low level, you'll get more than that, maybe about 4= 0. </div><div class=3D"gmail_default" style=3D"font-size:small">Dick</div= ><div class=3D"gmail_default" style=3D"font-size:small"> </div></div> = <div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Wed, Sep= 13, 2023 at 9:14=E2=80=AFPM David Jackson Morris <<a href=3D"mailto:dmor= ris@xxxxxxxx">dmorris@xxxxxxxx</a>> wrote: </div><blockquote class=3D= "gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(20= 4,204,204);padding-left:1ex"><div class=3D"msg-5301221719702691337"> <div lang=3D"DA" style=3D"overflow-wrap: break-word;"> <div class=3D"m_-5301221719702691337WordSection1"> Dear all,</= p>   In teaching an undergrad course o= n hearing science the students have asked, how many critical bands are there= in normal healthy hearing? The text that we use says that there are 24.&nbs= p;  If I ask ChatGPT it also cites Fletcher and Munson=E2=80=99s estimation of 24, but what would it know. . .  <u= >   Am I right in suspecting that th= is may have been revised upwards at some stage (?).  Is the collective w= isdom of the list able to help with this or point to an authoritative source= ?    Cheers David     <div> <div> David Jackson Morris, PhD, LTCL</= u> Asso= ciate Professor/Lektor</spa= n> &nbs= p; University of Copenhagen/K=C3=B8benhavns Universitet Spee= ch Pathology and Audiology/Audiologop=C3=A6di Department of Nor= dic Studies and Linguistics/Institut for Nordiske Studier og Sprogvidenskab<= u> Emil H= olms Kanal 2 2300 Copenhagen S= /K=C3=B8benhavn S  <= /u> <a href=3D"https:= //nors.ku.dk/english/staff/?pure=3Den/persons/398661" target=3D"_blank"><spa= n style=3D"color:rgb(5,99,193)">Department Homepage</a>  <spa= n style=3D"font-size:12pt;font-family:"Times New Roman",serif;colo= r:black">  <spa= n style=3D"font-size:12pt;font-family:"Times New Roman",serif;colo= r:black"> <img border=3D"0= " width=3D"252" height=3D"87" style=3D"width: 2.625in; height: 0.9062in;" id= =3D"m_-5301221719702691337Billede_x0020_1" alt=3D"Title: SD_Logo" data-uniqu= e-identifier=3D"">  -  <spa= n style=3D"font-size:12pt;font-family:"Times New Roman",serif;colo= r:black"> <a href=3D"https://informationssikkerhed= .ku.dk/persondatabeskyttelse/privatlivspolitik/" target=3D"_blank">S=C3=A5dan beskytter vi persondata</a> </div> </div>     </div> </div> </div></blockquote></div> </div></blockquote></div></body></html>= --Apple-Mail-F42B6EED-FFA0-4277-A6E2-FE88E52EE3C4--

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