The CBE philosophy
considers an understanding of
all relevant noise generating
elements an essential part of
the total approach to Aircraft
Interior Noise Reduction.
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The
successful treatment of all
of the following "areas of
concern" is fundamental to
achieving a low noise
interior.
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- Skin, Interior Panel
and Bulkhead damping.
- Intercostal and
other cavity energy
damping and
absorption.
- Frame radiation
reduction.
- Interior Panel,
Bulkhead and Cabinetry
isolation.
- Floor/carpet
insulation.
- ECS Noise reduction.
(Achieving optimum air
flow. Optimum
placement of mufflers.
Plenum and
distribution box
damping and
insulation.
Bleed-air-mix noise
reduction. Air return
treatments). Muffler
selection and
placement.
- Panel integrity
concerns. (Noise leaks
caused by lighting
fittings, ECS
attachments and other
acoustical breaches in
the interior panel
system).
- Mechanical isolation
and acoustical
baffling of noisy
components such as
fans, pumps, power
supplies and
inverters.
- Sink and shower
drain noise reduction
(specialized "wet"
mufflers or shut-off
valves).
- Noisy Vent
treatments.
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- Fuel Pump and
Hydraulic Pump noise
reduction strategies.
- Effective skin
damping techniques at
antennas and other
boundary layer
protrusions and
discontinuities.
- Exterior fairing
damping methods.
- Optimum Engine
balance and vibration
isolation.
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Our extensive
experience shows the selection
of the most appropriate
materials and material
combinations for the treatment
of these concerns to be of prime
importance in targeting the most
weight-efficient and
acoustically effective design -
AND - It is only through a
scientific distribution of these
materials that a truly efficient
noise reduction system can be
engineered.
We recommend an
in-flight noise survey of the
subject aircraft prior
to the installation of any
custom Cabin Noise Reduction
System A careful analysis of
the resultant noise profile and the
experienced use of the
analysis data provides for a
highly optimized design
specifically tailored to the
subject aircraft and its
unique problems.
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