Modelling sound propagation in the presence of atmospheric turbulence for the auralization of aircraft noise
Paper in proceedings, 2014

A new tool for the auralization of aircraft noise in an urban environment is in development. When listening to aircraft noise sound level fluctuations caused by atmospheric turbulence are clearly audible. Therefore, to create a realistic auralization of aircraft noise, atmospheric turbulence needs to be included. Due to spatial inhomogeneities of the wind velocity and temperature in the atmosphere acoustic scattering occurs, affecting the transfer function between source and receiver. Both these inhomogeneities and the aircraft position are time-dependent, and therefore the transfer function varies with time resulting in the audible fluctuations. Assuming a stationary (frozen) atmosphere, the movement of the aircraft alone gives rise to fluctuations. A simplified model describing the influence of turbulence on a moving elevated source is developed, which can then be used to simulate the influence of atmospheric turbulence in the auralization of aircraft noise.

Acoustic modeling

Aircraft

Aircraft noise

Atmospheric turbulence

Turbulence simulations

Author

Frederik Rietdijk

Vibroacoustics

Jens Forssén

Vibroacoustics

Kurt Heutschi

The Journal of the Acoustical Society of America

Areas of Advance

Building Futures

Subject Categories

Civil Engineering

Meteorology and Atmospheric Sciences

Environmental Engineering

DOI

10.1121/1.4900268