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Acoustics

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Noise generated by transport vehicles, such as aircraft and cars, is a concern for the health, safety and comfort of passengers and crew member as well as inhabitants of noise affected areas.

RUAG Aviation has a wide range of expertise in both numerical and experimental analysis of noise sources and propagation paths in transport systems:

  • Aero-acoustic source identification (i.e. noise maps) through wind tunnel testing with microphone array Technology
  • Vibro-acoustic source identification during ground and flight testing with microphone array Technology
  • Numerical simulation of flow-induced noise in external and internal flows
  • Vibro-acoustic analysis and modelling of cabin/cockpit interiors and payload bays  

 

Aero-acoustic source identification

At RUAG Aviation we have experience with experimental determination of aircraft noise sources. Our wind tunnels can be instrumented with an array of 144 microphones to experimentally determine noise source maps.

Vibro-acoustic source identification

RUAG Aviation has experience and a track record of ground and flight testing with portable microphone arrays. Measurements in different platforms, such as business jets and helicopters, have been carried out with different goals: vibro-acoustic source identification, RCA (Root Cause Analysis) of noise issues, pre-buy acoustic inspection, development and validation of NVH (Noise, Vibration and Harshness) packages.

Numerical simulation of flow-induced noise

Flow-induced noise is numerically simulated at RUAG Aviation for both internal and external flows.

Vibro-acoustic analysis and modelling

Confined spaces, like cabin/cockpit interiors and payload bays, can be subject to excessive vibro-acoustic levels. At RUAG Aviation we have experience with analysis and modelling of vibro-acoustic phenomena via analytical, experimental and numerical (FEM – Finite Element Methods, SEA – Statistical Energy Analysis) modelling.