Us blokes could do with something like this when the other half is
prattling on a bit too much.
-----Original Message-----
From:
On Behalf Of John Leonard
Sent: Friday, February 08, 2008 8:38 AM
To: Birding-aus
Subject: Re: [Birding-Aus] How do loudly calling birds not deafen
themselves?
Bats have a system whereby they don't listen when they're emitting
their
unltrasonic pulses, but in the intervals they listen again for the
echoes (can't remember whether it's neurological or mechanical (ie
closing their ears)).
Although it isn't so critical for birds (they're not echo-locating)
they
may have some similar system.
cheers
John Leonard
On 08/02/2008, Tania Ireton <> wrote:
A friend rang me last night to ask how loudly calling birds such as
Rainbow Lorikeets and Sulphur-crested Cockatoos not deafen themselves
with their screeching? She was reading a new book on cicadas which
said that cicadas are able to disconnect something in their hearing
so
as to deaden the incoming sound before they started calling
themselves
(I didn't get all the details). She wanted to know how birds manage.
Any ideas?
Regards,
Tania
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--
John Leonard
Canberra
Australia
www.jleonard.net
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