Subject: semitone spacing in cochlear implants? From: niky prabhu <niky_prabhu@xxxxxxxx> Date: Sat, 1 Apr 2006 16:54:37 +0100--0-1541822835-1143906877=:3733 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Dear members I am working on the effects of filter spacing on melody recognition as an implication for cochlear implants. I have considered 4 filter spacings (i.e the Mel, ERB, Linear and the Semitone scales) to space 8 AM channels in an overall processing band from 80-4000Hz - for piano played melodies. The problem that was faced was in spacing the semitone tone scale. - if i consider a band width of around 2-3 semitones, i would cover only a small range of the entire band from 80-4000Hz. and inorder to cover the entire range i require many sets of filters spaced with the same width. - if i consider a band width of more number of semitones than there would be no diffirence between the linear scaling and the semitone scaling. As we all know that the semitone scale corresponds the best to the musical scale, is it possible to actually implement it in designing filter banks used in cochlear implants? inspite of the fact that it will require more number of independent filters. I request members to send comments as to wheather i should continue to consider the semitone spacing for my study. All suggestion are welcome! With best regards Niky Dept of Speech pathology & Audiology MAHE University Manipal India --------------------------------- Jiyo cricket on Yahoo! India cricket Yahoo! Messenger Mobile Stay in touch with your buddies all the time. --0-1541822835-1143906877=:3733 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: 8bit <DIV>Dear members</DIV> <DIV> </DIV> <DIV>I am working on the <FONT color=#0080ff>effects of filter spacing on melody recognition as an implication for cochlear implants.</FONT><FONT color=#000000> I have considered 4 filter spacings (i.e the Mel, ERB, Linear and the Semitone scales) to space 8 AM channels in an overall processing band from 80-4000Hz - for piano played melodies. </FONT></DIV> <DIV> </DIV> <DIV>The problem that was faced was in spacing the semitone tone scale. </DIV> <DIV> </DIV> <DIV>- if i consider a band width of around 2-3 semitones, i would cover only a <FONT color=#0060bf>small range</FONT> of the entire band from 80-4000Hz. and inorder to cover the entire range i require many sets of filters spaced with the same width. </DIV> <DIV> </DIV> <DIV>- if i consider a band width of more number of semitones than there would be no diffirence between the linear scaling and the semitone scaling.</DIV> <DIV> </DIV> <DIV>As we all know that the semitone scale corresponds the best to the musical scale, is it possible to actually implement it in designing filter banks used in cochlear implants? inspite of the fact that it will require more number of independent filters.</DIV> <DIV> </DIV> <DIV>I request members to send comments as to wheather i should continue to consider the semitone spacing for my study.</DIV> <DIV>All suggestion are welcome!</DIV> <DIV> </DIV> <DIV>With best regards</DIV> <DIV> </DIV> <DIV>Niky</DIV> <DIV> </DIV> <DIV> </DIV> <DIV> </DIV> <DIV> </DIV> <DIV>Dept of Speech pathology & Audiology</DIV> <DIV>MAHE University</DIV> <DIV>Manipal</DIV> <DIV>India</DIV> <DIV> </DIV> <DIV> </DIV> <DIV> </DIV><p> <hr size=1> Jiyo cricket on <a href="http://us.rd.yahoo.com/mail/in/mailcricket/*http://in.sports.yahoo.com/cricket/">Yahoo! India cricket</a><br> <a href="http://us.rd.yahoo.com/mail/in/mailmobilemessenger/*http://in.mobile.yahoo.com/new/messenger/">Yahoo! Messenger Mobile</a> Stay in touch with your buddies all the time. --0-1541822835-1143906877=:3733--