Estimation of uncertainties due to the wind-induced noise in a screened microphone

David Ecotiere (1)

1 CETE Est - Centre d'études techniques de l'équipement Est

An outdoor sound measurement can be influenced by the noise induced by the wind at a screened microphone. This noise originates from turbulences that come from the direct interaction between the wind and the wind screen, as well as those generated by the interaction between the wind and the surrounding surfaces, specially the ground. The wind noise contribution introduces a bias in the measurement results which depends on the noise source, the wind speed, and other parameters such as the ground roughness length or the atmospheric stability for example. We present here an estimation of this bias, as well as the uncertainties associated to this bias coming from some input parameters. These estimations were obtained using some Monte Carlo simulations and a wind-induced noise model (van den Berg, 2006). Some practical applications are also presented.

Mots clés: uncertainties; wind; screen

Domaines: Acoustique [physics.class-ph]

David Ecotiere. Estimation of uncertainties due to the wind-induced noise in a screened microphone. Acoustics 2012, Apr 2012, Nantes, France. ⟨hal-00811122⟩