Subject: Re: Temporal Envelope based pitch perception From: Imran Dhamani <imrandhamani@xxxxxxxx> Date: Thu, 4 Feb 2010 12:02:04 +0530 List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY>--0-782291161-1265265124=:54218 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Hi everyone, =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 Thank you so much for your= explanations and suggestions. It is really a great help and inspiration fo= r me to interact with the experts in the field. I tried doing a similar exp= eriment today but instead of using the earlier vocoding approach (band pass= filtering, envelope extraction and modulation) that I had performed, I use= d the auditory chimera software developed by Shen, Smith, Oxenham, Delgutte= (i.e the envelope of speech and fine structure of random noise with same p= ower spectrum as of speech) using various bands (8-24). On analysing the pi= tch I found relatively lesser mismatch (15-20 Hz) in Fo/pitch of the origin= al and vocoded stimuli from 8-19 bands and almost similar pitch (no mismatc= h)=A0from 20-24 bands (i.e. within 5-10 Hz), which probably may indicate a = technical fault (maybe filtering/normalization) and/or difference (envelope= extraction method) in the vocoding that I had performed earlier. The main = question still on my mind is how or in what form the pitch gets encoded in a comple= x temporal envelope of speech. =A0 Best Regards Imran Dhamani =A0 =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=20 $$$$$ monty@xxxxxxxx@xxxxxxxx@xxxxxxxx@xxxxxxxx=0A=0A=0A Your Mail works best with the New Yahoo Optim= ized IE8. Get it NOW! http://downloads.yahoo.com/in/internetexplorer/ --0-782291161-1265265124=:54218 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable <table cellspacing=3D"0" cellpadding=3D"0" border=3D"0" ><tr><td valign=3D"= top" style=3D"font: inherit;"><FONT face=3D"bookman old style, new york, ti= mes, serif"> <P style=3D"MARGIN: 0cm 0cm 10pt" class=3DMsoNormal><FONT size=3D3><FONT fa= ce=3DCalibri>Hi everyone,<?xml:namespace prefix =3D o ns =3D "urn:schemas-m= icrosoft-com:office:office" /><o:p></o:p></FONT></FONT></DIV> <P style=3D"MARGIN: 0cm 0cm 10pt" class=3DMsoNormal><FONT size=3D3><FONT fa= ce=3DCalibri><SPAN style=3D"mso-spacerun: yes"> &nbs= p; </SPAN= >Thank you so much for your explanations and suggestions. It is really a gr= eat help and inspiration for me to interact with the experts in the field. = I tried doing a similar experiment today but instead of using the earlier v= ocoding approach (band pass filtering, envelope extraction and modulation) = that I had performed, I used the auditory chimera software developed by She= n, Smith, Oxenham, Delgutte (i.e the envelope of speech and fine structure = of random noise with same power spectrum as of speech) using various bands = (8-24). On analysing the pitch I found relatively lesser mismatch (15-20 Hz= ) in Fo/pitch of the original and vocoded stimuli from 8-19 bands and almos= t similar pitch (no mismatch) from 20-24 bands (i.e. within 5-10 Hz), which probably may indicate a technical fault (maybe filtering/normalizati= on) and/or difference (envelope extraction method) in the vocoding that I h= ad performed earlier. The main question still on my mind is how or in what = form the pitch gets encoded in a complex temporal envelope of speech.</FONT= ></FONT></DIV> <P style=3D"MARGIN: 0cm 0cm 10pt" class=3DMsoNormal><o:p><FONT size=3D3 fac= e=3DCalibri> </FONT></o:p></DIV> <P style=3D"MARGIN: 0cm 0cm 10pt" class=3DMsoNormal><FONT size=3D3 face=3DC= alibri>Best Regards</FONT></DIV> <P style=3D"MARGIN: 0cm 0cm 10pt" class=3DMsoNormal><FONT size=3D3 face=3DC= alibri>Imran Dhamani</FONT></DIV> <DIV></FONT> </DIV> <DIV> &nbs= p; <BR><BR>$$$$$ monty@xxxxxxxx@xxxxxxxx@xxxxxxxx@xxxxxxxx</DIV></td></tr></table><= br>=0A <!--1--><hr size=3D1></hr> =0AYour Mail works best with the New= Yahoo Optimized IE8. <a href=3D"http://in.rd.yahoo.com/tagline_ie8_new/*ht= tp://downloads.yahoo.com/in/internetexplorer/" target=3D"_blank">Get it NOW= !</a>. --0-782291161-1265265124=:54218--