Hot air and OBP's

Subject: Hot air and OBP's
From: Andrew Taylor <>
Date: Wed, 6 Sep 2006 20:48:49 +1000
On Wed, Sep 06, 2006 at 05:00:51PM +1100, Evan Beaver wrote:
> The turbines don't actually make that much noise. This is a myth generated
> by the anti-wind/pro-nuke lobby group. Noise is inefficiency and the new
> model turbines are almost completely silent.

I found part of the EES for Bald Hills at:
The turbines they were proposing to install are said by their manufacturer
to produce  at 106dbA in high wind speeds.  This is not quiet.  It'll
be low frequency sound which propagates well so it might be audible
at 1km and perhaps even annoying to humans at that distance. The PDF
discusses this.  Any impact on birds is very hard to guess.  Because of
the frequencies involved I'd guess bird communication would be affected
only very close to a turbine.


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