Chris Brunt Engineering

The CBE approach




The World Leader in Aircraft Interior Acoustics

The CBE philosophy considers an understanding of all relevant noise generating elements an essential part of the total approach to Aircraft Interior Noise Reduction.

The successful treatment of all of the following "areas of concern" is fundamental to achieving a low noise interior.

  • 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.
  • Noisy Vent treatments.

  • 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 isolation.
CBE's extensive experience has shown the selection of the most appropriate materials and material combinations for treatment of these concerns to be of prime importance in achieving the most weight efficient and acoustically productive results. It is however only through a scientific distribution of these materials that a truly weight efficient design can be realized. This is most accurately achieved through careful analysis of the noise signature of the subject aircraft under its normal cruise-flight conditions. The CBE philosophy asserts that it is only through the intelligent and experienced use of the data so obtained that a highly optimized design, specifically tailored to the subject aircraft and its unique problems can be possible.