Subject: Re: [AUDITORY] Scream spectrum From: "Richard F. Lyon" <dicklyon@xxxxxxxx> Date: Tue, 7 Feb 2017 08:08:20 -0800 List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY>--001a11442ee4ff72910547f2f442 Content-Type: text/plain; charset=UTF-8 I agree with the paper Maria shows: The modulation ("roughness" in the case of screams) matters a lot more than the spectrum, or frequency. Animal communication sounds, which co-evolved with hearing, use pseudo-periodic excitation to be more detectable than random other natural sounds. Since these sounds are also rich in overtones, they tend to use pitches that are low compared to the best frequencies of hearing, and have energy spread across the whole range of frequencies that we hear. Dick On Mon, Feb 6, 2017 at 11:55 PM, Chait, Maria <m.chait@xxxxxxxx> wrote: > I guess this recent paper from Current Biology would be relevant? > > http://www.cell.com/current-biology/abstract/S0960-9822(15)00737-X > > > > > --001a11442ee4ff72910547f2f442 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable <div dir=3D"ltr"><div><div>I agree with the paper Maria shows:=C2=A0 The mo= dulation ("roughness" in the case of screams) matters a lot more = than the spectrum, or frequency.<br><br></div>Animal communication sounds, = which co-evolved with hearing, use pseudo-periodic excitation to be more de= tectable than random other natural sounds. Since these sounds are also rich= in overtones, they tend to use pitches that are low compared to the best f= requencies of hearing, and have energy spread across the whole range of fre= quencies that we hear.<br><br></div>Dick<br><br><div><div><div><div class= =3D"gmail_extra"><br><div class=3D"gmail_quote">On Mon, Feb 6, 2017 at 11:5= 5 PM, Chait, Maria <span dir=3D"ltr"><<a href=3D"mailto:m.chait@xxxxxxxx= k" target=3D"_blank">m.chait@xxxxxxxx</a>></span> wrote:<br><blockquote= class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc soli= d;padding-left:1ex"> <div link=3D"blue" vlink=3D"purple" lang=3D"EN-GB"> <div class=3D"m_1078741080291367909WordSection1"> <p class=3D"MsoNormal"><a name=3D"m_1078741080291367909__MailEndCompose"><s= pan style=3D"font-size:11.0pt;font-family:"Calibri","sans-se= rif";color:#1f497d">I guess this recent paper from Current Biology wou= ld be relevant?<u></u><u></u></span></a></p> <p class=3D"MsoNormal"><a href=3D"http://www.cell.com/current-biology/abstr= act/S0960-9822(15)00737-X" target=3D"_blank"><span style=3D"font-size:11.0p= t;font-family:"Calibri","sans-serif"">http://www.cell.c= om/current-<wbr>biology/abstract/S0960-9822(<wbr>15)00737-X</span></a><span= style=3D"font-size:11.0pt;font-family:"Calibri","sans-serif= ";color:#1f497d"><u></u><u></u></span></p> <p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:"Ca= libri","sans-serif";color:#1f497d"><u></u>=C2=A0<u></u></spa= n></p>=C2=A0 <p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:"Ca= libri","sans-serif";color:#1f497d"></span></p></div></div></= blockquote></div><br></div></div></div></div></div> --001a11442ee4ff72910547f2f442--