The combination of noise from separate time varying sources

Two methods of combining time varying noise sources are proposed and the applications of these procedures to practical situations discussed. A design method is suggested that enables both L₁₀ and L₉₀ values to be determined when two or more Gaussian traffic noise distributions are combined. It is indicated that the combination technique may be applied to various noise sources, e.g. the interaction of aircraft fly-past and surface traffic noise.