Subject: CI Music Perception From: Ray Goldsworthy <raygold(at)SENS.COM> Date: Tue, 8 Mar 2005 12:20:13 -0500This is a multi-part message in MIME format. ------=_NextPart_000_000C_01C523D9.2DB2B8D0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Dear list, Hello, I am a new member. A colleague pointed out this list to me since = I am a CI user as well as a research scientist interested in CI = psychoacoustics. I thouroughly enjoy listening to and playing music. I = play drums and keyboard. I lost my hearing suddenly to meningitis at 12 = and was implanted at 13. As a child, I did not have a good sense of = harmony, nor could I sing in tune, but I began playing drums around the = age of 11. I am now in an amateur band and listen to several hours of = music every day. Preferences tend towards rhythmic pieces such as Indian = music (I also play tablas) and bluegrass (love the finger-picking), but = I my interests vary. The greatest deficit that I have noticed is that I don't feel a strong = percept associated with chords. I do experience a weak percept allowing = me to classify a strong harmonic diad such as tonic and fifth, or tonic = and octave, versus tonic and major 7th. But in a controlled study, I = think I would fail to classify majors versus minors. A couple comments related to previous threads. First, I think I know a = CI user who can sing in tune. I've always felt that I was one of the = stars of the implant world, but this guy is phenomenal and is more of a = professional musician than me (i.e. he gets paid gigs). He is a = keyboardist, but is trained so well, that I wouldn't be surprised if he = can match his voice. Second, and this is huge. Please do not think that the CI simulations = currently used are accurate is transmitting the percept of sound. At = best, they are accurate indicators of the information content = transmitted by a generic CI sound processing strategy. The moment you = use either a noise carrier or sinusoids or even band-limited impulse = trains, you are producing a percept that is fundamentally different from = what music sounds like to me. As a musician dances upwards in a scale, = the individual notes produce distinct electrode amplitude patterns that = in turn produce a percept (hopefully ptich matched). But for a NH = listening to a CI simulation, two adjacent bands being bombarded with = band-limited noise carriers is not going to produce the same percept at = all. To begin with, using noise carriers will introduce temporal = fluctuations in the envelope signal that is distinctly interpreted as = noise. I could go on, but I feel I am going to fast to make a cohesive = statement, so will stop. I hope these comments prove interesting since they are my introduction = to the list.... Ray Sensimetrics Corporation 48 Grove St. Somerville, MA 02144 Tel: 617-625-0600 x240 Fax: 617-625-6612 email: raygold(at)sens.com web: www.sens.com=20 ------=_NextPart_000_000C_01C523D9.2DB2B8D0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=3DContent-Type content=3D"text/html; = charset=3Diso-8859-1"> <META content=3D"MSHTML 6.00.2900.2604" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=3D#ffffff> <DIV><FONT face=3DArial size=3D2> <DIV><FONT face=3DArial size=3D2>Dear list,</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV>Hello, I am a new member. A colleague pointed out this list to me = <FONT=20 face=3DArial size=3D2>since I am a CI user as well as a research = scientist=20 interested in CI psychoacoustics. I thouroughly enjoy listening to = and=20 playing music. I play drums and keyboard. I lost my hearing suddenly to=20 meningitis at 12 and was implanted at 13. As a child, I did not have a = good=20 sense of harmony, nor could I sing in tune, but I began playing drums = around the=20 age of 11. I am now in an amateur band and listen to several hours of = music=20 every day. Preferences tend towards rhythmic pieces such as Indian music = (I also=20 play tablas) and bluegrass (love the finger-picking), but I my = interests vary.</FONT></DIV> <DIV> </DIV> <DIV>The greatest deficit that I have noticed is that I don't feel a = strong=20 percept associated with chords. I do experience a weak percept allowing = me to=20 classify a strong harmonic diad such as tonic and fifth, or tonic = and=20 octave, versus tonic and major 7th. But in a controlled study, I = think I=20 would fail to classify majors versus minors.</DIV> <DIV> </DIV> <DIV>A couple comments related to previous threads. First, I think I = know a CI=20 user who can sing in tune. I've always felt that I was one of the = stars of=20 the implant world, but this guy is phenomenal and is more of a = professional=20 musician than me (i.e. he gets paid gigs). He is a keyboardist, but is = trained=20 so well, that I wouldn't be surprised if he can match his voice.</DIV> <DIV> </DIV> <DIV>Second, and this is huge. Please do not think that the CI = simulations=20 currently used are accurate is transmitting the percept of sound. At = best, they=20 are accurate indicators of the information content transmitted by a = generic CI=20 sound processing strategy. The moment you use either a noise carrier or=20 sinusoids or even band-limited impulse trains, you are producing a = percept that=20 is fundamentally different from what music sounds like to me. As a = musician=20 dances upwards in a scale, the individual notes produce distinct = electrode=20 amplitude patterns that in turn produce a percept (hopefully ptich = matched). But=20 for a NH listening to a CI simulation, two adjacent bands being = bombarded with=20 band-limited noise carriers is not going to produce the same percept at = all. To=20 begin with, using noise carriers will introduce temporal fluctuations in = the=20 envelope signal that is distinctly interpreted as noise. I could go on, = but I=20 feel I am going to fast to make a cohesive statement, so will = stop.</DIV> <DIV> </DIV> <DIV>I hope these comments prove interesting since they are my = introduction to=20 the list....</DIV> <DIV>Ray</DIV> <DIV> </DIV> <DIV> </DIV></FONT></DIV> <DIV><FONT face=3DArial size=3D2>Sensimetrics = Corporation<BR> 48 Grove=20 St.<BR> Somerville, MA 02144<BR> Tel: = 617-625-0600=20 x240<BR> Fax: 617-625-6612<BR> email: <A=20 href=3D"mailto:raygold(at)sens.com">raygold(at)sens.com</A><BR> = web: <A=20 href=3D"http://www.sens.com">www.sens.com</A> = <BR></FONT></DIV></BODY></HTML> ------=_NextPart_000_000C_01C523D9.2DB2B8D0--