Re: Frequency dependent conductive loss (Colette Mckay )

Subject: Re: Frequency dependent conductive loss From: Colette Mckay <Colette.Mckay@xxxxxxxx> Date: Wed, 12 Nov 2008 11:37:05 +0000 List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY> This is a multi-part message in MIME format ---------1b843df51b843df5 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Richard, any good text book will show you how conductive loss profile shape= is related to changes in acoustic impedance in the middles ear. Colette = ***************************************************** Professor Colette McKay Chair in Applied Hearing Science Human Communication and Deafness Group School of Psychological Sciences University of Manchester Manchester M13 9PL Phone: +44 (0)161 3061671 Fax: +44 (0)161 2753373 colette.mckay@xxxxxxxx = PA Wendy Spruce +44 (0)161 2758281 wendy.spruce@xxxxxxxx ******************************************************* ________________________________ From: AUDITORY - Research in Auditory Perception [mailto:AUDITORY@xxxxxxxx= ILL.CA] On Behalf Of Richard - UK Sent: 12 November 2008 09:11 To: AUDITORY@xxxxxxxx Subject: [AUDITORY] Frequency dependent conductive loss = I have noticed that conductive losses can have unusual profiles. = For example a significant low frequency conductive loss can very steeply di= sappear at 2KHz. = Can anyone recommend an on-line PDF or similar which discusses conductive l= oss causes and profiles. = Thanks. ---------1b843df51b843df5 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:st1=3D"urn:schemas-microsoft-com:office:smarttags" xmlns=3D"http://ww= w.w3.org/TR/REC-html40"> <head> <META HTTP-EQUIV=3D"Content-Type" CONTENT=3D"text/html; charset=3Dus-ascii"= > <meta name=3DGenerator content=3D"Microsoft Word 11 (filtered medium)"> <o:SmartTagType namespaceuri=3D"urn:schemas-microsoft-com:office:smarttags" name=3D"countr= y-region"/> <o:SmartTagType namespaceuri=3D"urn:schemas-microsoft-com:office:smarttags"= name=3D"PlaceType"/> <o:SmartTagType namespaceuri=3D"urn:schemas-microsoft-com:office:smarttags"= name=3D"PlaceName"/> <o:SmartTagType namespaceuri=3D"urn:schemas-microsoft-com:office:smarttags"= name=3D"City"/> <o:SmartTagType namespaceuri=3D"urn:schemas-microsoft-com:office:smarttags"= name=3D"place"/>  <style>  </style>  </head> <body bgcolor=3Dwhite lang=3DEN-GB link=3Dblue vlink=3Dpurple> <div class=3DSection1> Richard, any good text book will show = you how conductive loss profile shape is related to changes in acoustic impedan= ce in the middles ear.<o:p></o:p> Colette<o:p></o:p> <o:p> </o:p> <div> ******= ***********************************************<o:p></o:p></p= > Profes= sor Colette McKay<o:p></o:p> Chair = in Applied Hearing Science<o:p></o:p> Human Communication and Deafness Group<o:p></o:p> School= of Psychological Sciences<o:p></o:p> <st1:place w:st=3D"on"><st1:P= laceType w:st=3D"on">University</st1:Place= Type> of <st1= :PlaceName w:st=3D"on">Manchester</st1:PlaceName></st1:place><o:p></o:p>= <st1:City w:st=3D"on"><st1:pl= ace w:st=3D"on">Manchester</st1:place= ></st1:City> M13 9PL<= o:p></o:p> Phone:= +44 (0)161 3061671<o:p></o:p> Fax: += 44 (0)161 2753373<o:p></o:p> colett= e.mckay@xxxxxxxx<o:p></o:p> <o:p>&= nbsp;</o:p> PA Wen= dy Spruce<o:p></o:p> +44 (0= )161 2758281<o:p></o:p> wendy.= spruce@xxxxxxxx<o:p></o:p> ******= *************************************************<o:p></o:p> </div> <div> <div class=3DMsoNormal align=3Dcenter style=3D'text-align:center'> <hr size=3D2 width=3D"100%" align=3Dcenter tabindex=3D-1> </div> From:= AUDITORY - Research in Auditory Perception [mailto:AUDITORY@xxxxxxxx= ] On Behalf Of Richard - <st1:country-r= egion w:st=3D"on"><st1:place w:st=3D"on">UK</st1:place></st1:country-region> Sent: 12 November 2008 09:11= To: AUDITORY@xxxxxxxx= Subject: [AUDITORY] Frequenc= y dependent conductive loss<o:p></o:p></span= > </div> <o:p> </o:p> <div> I have noticed that conductive losses can have unusual profiles.<o:p></o:p> </div> <div>  <o:p></o:p> </div> <div> For example a significant low frequency conductive loss = can very steeply disappear at 2KHz.<o:p></o:p> </div> <div>  <o:p></o:p> </div> <div> Can anyone recommend an on-line PDF or similar which discusses conductive loss causes and profiles.<o:p></o:p>= </div> <div>  <o:p></o:p> </div> <div> Thanks.<o:p></o:p> </div> </div> </body> </html> ---------1b843df51b843df5--

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