Subject: Re: AP and age From: Pierre Divenyi <pdivenyi@xxxxxxxx> Date: Sat, 1 Dec 2012 10:02:25 -0800 List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY>Hi Jonathan, Thank you for the lead. In fact, I vaguely remember having heard Mike tell me about this study. But the genetic link still gives no answer to the upward shift of AP, even if one would postulate a gene alteration as one gets older -- a red herring IMHO. So, the question remains: is the basilar membrane stiffening a sufficient explanation? To me it isn't because then there would be a differential shift depending on the frequency region of the stimulus (if I am not mistaken, the base of the BM stiffens more than the apex), a phenomenon of which I am not aware. In fact, the pitch of a low-frequency pure tone has shifted upwards for me as much as that of a complex tone without low-frequency components. Best, -Pierre On 12/1/12 7:42 AM, "Jonathan Berger" <brg@xxxxxxxx> wrote: >Hi Pierre - >I hope all is well - >I saw your post on the auditory list. There's an ongoing study at UCSF on >AP ( >http://perfectpitch.ucsf.edu/study/ ) in which changes with age is one of >the factors >being examined. >Mik Merzenich and others (all from the UCSF group, I believe) published >the attached >paper in 2007. >No real answers - but a start - >Hope this helps - >Best - >Jonathan > >*-*-*\\*//*-*-* >Jonathan Berger >The Denning Family Provostial Professor >Stanford University >