How do loudly calling birds not deafen themselves?

["Evan Beaver" <>]

I'm also guessing a bit, but it might be a question of direction of
projection. For example, I'm a renowned big sneezer, to the point that
my wife complains about the noise, but I notice very little noise. In
this case the pressure wave is travelling forward out of my head, away
from my ears.

EB

On 2/8/08, John Leonard <> wrote:
> 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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-- 
Evan Beaver
Lapstone, Blue Mountains, NSW
lat=-33.77, lon=150.64
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