| Re: TGV Aerodynamic Noise |
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Group: alt.planning.transportation · Group Profile
Author: Scott M. KozelScott M. Kozel Date: Sep 9, 2008 10:41
>
> The sound of air rushing is something that is quite easily swallowed over
> long distances.
>
> The very low frequency component of jet engine noise travels extremely far
> distances, because that is what low frequency sound does. The low
> frequncy rumble of aircraft taking off at the Portland airport used to
> rattle my windows, when I lived some 8 miles from the takeoff path of the
> runway. The high frequency component was lost completely, but that low
> frequency stuff was terrible.
You made that up out of whole cloth. When we lived in Florida, we were
in a quiet neighborhood 5 miles from the regional airport, and in-line
with the main jet runway, and we never noticed that phenomena, and that
was at a time when airliner jet engines were much noisier (first
generation turbojet engines, on B-707, B-727 and DC-8), than later engines.
Besides, it would take sound 40 seconds to travel 8 miles, making it
rather difficult to correlate it to the airport in any case.
.
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