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_Parasaurolophus'_ crest and how much we can't deduce from it.

>>Ben and Martin,

>>   Did not someone o\n one of Discovery Channels PaleoWorld programs
>> make a rough duplicate of a Parasaurolophus resonating chamber and
>> blow it to produce a low frequency moan? It is still nice to have
>> asecond opinion.
>You are right.  Several seasons ago a program surrounding the
>_Parasaurolophus_ and its resonating chamber was aired.
>I do not recall the gentlemans name though...
>He used a piece of PVC pipe shaped like the resonating chamber.  The sound
>came out something like an out
>of tune trombone.

I really don't see what difference making the pipes the same size and shape
of _P._'s crest will make.

An analouge to this is the different types and styles of brass instruments;
take a trumpet and flueggel-horn for example.  Although, size and shape does
control the range and vague tone qualities, the real test as to what the
thing sounds like is in the mouth-piece.  In a trumpet the mouth-piece has a
very shallow cup making the tone very bright, and accordingly you can play
trumpets very loudly without trying very hard.  In contrast, a flueggel-horn
(for those of you who don't know, a flueggel-horn is a brass instrument
similar in size and shape to a trumpet; it's slightly larger and the pipes
look funny) has a mouth-piece that has a very deep cup making the tone more
mellow and non-dirrectional, even though the instrument itself is very
similar in size and shape.

What I'm getting at is, we can't really deduce much of how _Parasaurolophus_,
or any other Hypacrosaurine, sounded like unless we know the shape of the
openning into the larynx, i.e. whether it was shallow or deep.  Since that is
almost entirely soft-anatomy that probably wouldn't fossilize, we can't
really tell how they sounded much more than the basic range of the animal.

Just thought of something.  On the _H. casuarius_ 'mummies,' have the throats
been preserved, especially the voice boxes?  If we could see the openning to
the voice-box on these, then we could probably make generalizations about the
whole family, if their calls were bright and loud or mellow and

Maybe they could even change the depth of the opening to make some calls,
like mating calls maybe, more bright and loud (and obnoxious); and make other
calls like warnings more mellow and non-dirrectional.  Who knows?

Peter Buchholz