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Development and promotion
in the field of:
"Acoustics Materials and Containers
for Absorbing"Noise".
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Flying and Engine Noise
Exhaust and
Muffler Pipe Systems
Originally posted in 2005 (with revisions 2009*)
Background "Noise"
is regarded as one of the significant sources of the harmful environmental
effects of new technology.
Vehicle road noise is a "white
noise" we all get use to, but lessens the quality of the outdoors
in the city. Many previous studies were under taken, particularly
in the reduction of the noise.
Among the ways of research considered:
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Reduction in the production of the noise:
this supposes a work of "aero acoustics" analysis on the
identification and the control of the sources of noise.
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The absorption/reduction of background noise:
this supposes the use of systems having properties of acoustic absorption.
Generally these systems can be multifunction (also assuming a structural
and/or anti-crash role) and employ materials that absorb with or
without active control of the impedance.
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Orientation of the produced noise:
this supposes work on the acoustic propagation in order to be able
to trace charts of acoustic ISO intensity, thus carrying out perimeters
of demarcation of the sounds harmful effect.
There should be a Canadian Study that aims at establishing a synergy
between the industrial needs and the state of the art, as well as the
developments to be promoted in the field of Acoustics Materials for
Absorbing "Noise".
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Glossary
of Acoustic Terms Acoustic Design, uk
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Acoustics Materials
and Containers for Absorbing Noise
Engine Design Practices
Setting up an established set of rules or parameters would be first
before using a modelling program to sketch out a new engine design
for the gyrocopter. There are very few engines designed specifically
for gyroplanes. Most have been automotive conversions.
Once the software perimeters and guidelines have been established,
all gyroplane engines, in the design stage, could be tested at the
modelling stage for acoustical noise levels. Reducing the noise factor
is paramount in allowing gyroplanes over residential areas. Currently
an electric powered gyroplane is
over a decade away in development.
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