Sound baffle

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Article #984

#984

From: DonH
Date: Tue, 30 Nov 2010 18:25

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One thing about sound, as compared to light: it moves at much slower speed, 
and its waves can be easily disrupted - as anyone with high walls knows 
(living on a busy road).
  Hence, while shipping traffic off US coast may cause noise which negates 
humpback whales sound communication, the installing of some type of baffle 
below a ship's hull may be effective in dissipating engine noise.
  Better still if it is propeller noise, as a baffle beneath the blades 
might not only disperse noise, but assist forward movement by streamlining 
force backwards.
  Or, is this whole scheme impractical?
(Refer: "Death of the Oceans?", on SBS-TV)

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From: "DonH" <donlhumphries@bigpond.com>
Newsgroups: aus.science
Subject: Sound baffle
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