Re: Dinosaur hearing

[Phil Bigelow <bigelowp@juno.com>]

> 1: Naturwissenschaften. 2005 Oct 18;:1-4 [Epub ahead
> of print] 
> 
> Audiogram, body mass, and basilar papilla length:
> correlations in birds and predictions for extinct
> archosaurs.
> 
> Gleich O, Dooling RJ, Manley GA.
> ENT Department, University of Regensburg,
> Franz-Josef-Strauss-Allee 11, 93042, Regensburg,
> Germany, otto.gleich@klinik.uni-regensburg.de.

> Based on the regression
> analysis of two significant correlations in living
> archosaurs (best audiogram frequency vs body mass and
> best audiogram frequency vs papillar length), we
> suggest that hearing in large dinosaurs was restricted
> to low frequencies with a high-frequency limit below 3
> kHz.


Below three kHz, eh?
It may also give us a rough idea of the frequencies that the larger dinos
used during vocalization.

If anyone has a digital audio file of Spielberg's T.rex vocalizing in
JP1, it might be fun to see what its spectrum looks like and if its
dominant frequencies are under 3 kHz.

I once heard a rumor that JP1 engineers sampled the sound of a heavy
metal table being dragged across a floor to create T. rex's roar, but I
haven't seen a confirmation of the claim.

<pb>
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