Subject: Re: Function of Cochlear Nucleus cell types From: Neil Maxwell Mclachlan <mcln@xxxxxxxx> Date: Sun, 12 Jan 2014 23:23:29 +0000 List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY>--_000_7747E920F0A054468CA0B63D2581554A81BF018A000SEXMBXQS2uni_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable We have just published a neurobiologically inspired signal processing algor= ithm that employs chopper and octopus cell properties to enhance the salien= ce of tonal signals such as vocal communication. In this paper we suggest c= hopper cell synchronization likely evolved to enhance sensitivity to vocali= zations rather than fine pitch perception, which has little evolutionary be= nefit for early animals (see McLachlan NM and Grayden DB (2014). Enhancemen= t of speech perception in noise by periodicity processing: A neurobiologica= l model and signal processing algorithm, Speech Communication 57C, pp. 114-= 125. DOI information: 10.1016/j.specom.2013.09.007). Other important functional networks that stem from the CN involve learnt mo= tor reflexes via the pons (see Medina et al, with likely learning feedback = via the olivary complex) and habituation of hearing sensitivity by DCN cell= s. I have a review on these networks currently under review, so hopefully I= can share more information in the near future. Best regards Neil McLachlan From: AUDITORY - Research in Auditory Perception [mailto:AUDITORY@xxxxxxxx= ILL.CA] On Behalf Of AUDITORY automatic digest system Sent: Wednesday, 8 January 2014 4:01 PM To: AUDITORY@xxxxxxxx Subject: AUDITORY Digest - 6 Jan 2014 to 7 Jan 2014 (#2014-7) --_000_7747E920F0A054468CA0B63D2581554A81BF018A000SEXMBXQS2uni_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable <html xmlns:v=3D"urn:schemas-microsoft-com:vml" xmlns:o=3D"urn:schemas-micr= osoft-com:office:office" xmlns:w=3D"urn:schemas-microsoft-com:office:word" = xmlns:m=3D"http://schemas.microsoft.com/office/2004/12/omml" xmlns=3D"http:= //www.w3.org/TR/REC-html40"> <head> <meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dus-ascii"= > <meta name=3D"Generator" content=3D"Microsoft Word 14 (filtered medium)"> <style><!-- /* Font Definitions */ @xxxxxxxx {font-family:Calibri; panose-1:2 15 5 2 2 2 4 3 2 4;} @xxxxxxxx {font-family:Tahoma; panose-1:2 11 6 4 3 5 4 4 2 4;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {margin:0cm; margin-bottom:.0001pt; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-fareast-language:EN-US;} a:link, span.MsoHyperlink {mso-style-priority:99; color:blue; text-decoration:underline;} a:visited, span.MsoHyperlinkFollowed {mso-style-priority:99; color:purple; text-decoration:underline;} span.EmailStyle17 {mso-style-type:personal-reply; font-family:"Calibri","sans-serif"; color:#1F497D;} .MsoChpDefault {mso-style-type:export-only; mso-fareast-language:EN-US;} @xxxxxxxx WordSection1 {size:612.0pt 792.0pt; margin:72.0pt 72.0pt 72.0pt 72.0pt;} div.WordSection1 {page:WordSection1;} --></style><!--[if gte mso 9]><xml> <o:shapedefaults v:ext=3D"edit" spidmax=3D"1026" /> </xml><![endif]--><!--[if gte mso 9]><xml> <o:shapelayout v:ext=3D"edit"> <o:idmap v:ext=3D"edit" data=3D"1" /> </o:shapelayout></xml><![endif]--> </head> <body lang=3D"EN-AU" link=3D"blue" vlink=3D"purple"> <div class=3D"WordSection1"> <p class=3D"MsoNormal"><span style=3D"color:#1F497D">We have just published= a neurobiologically inspired signal processing algorithm that employs chop= per and octopus cell properties to enhance the salience of tonal signals su= ch as vocal communication. In this paper we suggest chopper cell synchronization likely evolved to enhance sensitiv= ity to vocalizations rather than fine pitch perception, which has little ev= olutionary benefit for early animals (see McLachlan NM and Grayden DB (2014= ). Enhancement of speech perception in noise by periodicity processing: A neurobiological model and signal pro= cessing algorithm, Speech Communication 57C, pp. 114-125. DOI information: = 10.1016/j.specom.2013.09.007). <o:p></o:p></span></p> <p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p> </o:p></spa= n></p> <p class=3D"MsoNormal"><span style=3D"color:#1F497D">Other important functi= onal networks that stem from the CN involve learnt motor reflexes via the p= ons (see Medina et al, with likely learning feedback via the olivary comple= x) and habituation of hearing sensitivity by DCN cells. I have a review on these networks currently under review, so= hopefully I can share more information in the near future. <o:p></o:p></span></p> <p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p> </o:p></spa= n></p> <p class=3D"MsoNormal"><span style=3D"color:#1F497D">Best regards <o:p></o:= p></span></p> <p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p> </o:p></spa= n></p> <p class=3D"MsoNormal"><span style=3D"color:#1F497D">Neil McLachlan<o:p></o= :p></span></p> <p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p> </o:p></spa= n></p> <p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:10.0pt;fo= nt-family:"Tahoma","sans-serif";mso-fareast-language:EN= -AU">From:</span></b><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-fa= mily:"Tahoma","sans-serif";mso-fareast-language:EN-AU">= AUDITORY - Research in Auditory Perception [mailto:AUDITORY@xxxxxxxx <b>On = Behalf Of </b>AUDITORY automatic digest system<br> <b>Sent:</b> Wednesday, 8 January 2014 4:01 PM<br> <b>To:</b> AUDITORY@xxxxxxxx<br> <b>Subject:</b> AUDITORY Digest - 6 Jan 2014 to 7 Jan 2014 (#2014-7)<o:p></= o:p></span></p> <p class=3D"MsoNormal"><o:p> </o:p></p> <p class=3D"MsoNormal"><o:p> </o:p></p> </div> </body> </html> --_000_7747E920F0A054468CA0B63D2581554A81BF018A000SEXMBXQS2uni_--