Abstract
A previous study of the authors' found that the spectral broadening of sound propagating through weak turbulence varied as the ratio w/L0 of the speed of the transverse wind w to the outer scale of turbulence L0. However, the condition of “weak” turbulence restricts the usefulness of the result to relatively calm atmospheric conditions or short acoustical paths. The present work extends the analysis to spectral broadening of sound by arbitrarily “strong” turbulence. In contrast, the spectral broadening in strong turbulence varies as the ratio w/ρ0, with ρ0 the transverse coherence length of the sound waves. Here we adapt recent optical theory to sound propagation and to the spectral broadening of sound.
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