I think that both Paul and Andrew are correct in their
explanations.
Interestingly, though, Dooling has also shown that hair cell
regeneration never keeps up with hair cell death. So it would seem that there would
be some permanent loss of hearing if a bird is exposed to extended periods of
loud noise. It is also likely that birds can lose some hearing as they age, as
more hair cells die and have a reduced ability to regenerate.
Stephen
Dr Stephen Ambrose
Ryde, NSW
-----Original Message-----
From:
[ On Behalf Of Andrew Taylor
Sent: Friday, 8 February 2008 10:21 AM
To:
Subject: How do loudly calling birds not deafen themselves?
On Fri, Feb 08, 2008 at 10:06:13AM +1100, wrote:
>
http://www.bsos.umd.edu/psyc/dooling/projects/hair%20cell%20recovery.htm
I didn't see Paul's e-mail before I send my last message hence the
duplicated content. Dooling is incidentally the author of the
relevant
chapter in the book I recommended (Nature's Music by Marler &
Slabbekoorn)
Andrew
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