Acoustic intensity, energy-density and diffuseness estimation in a directionally-constrained region
This work addresses sound field analysis for audio processing applications, but it appears incremental as it builds on existing parametric models with a spatial filter focus.
The authors tackled the problem of estimating acoustic intensity, energy density, and diffuseness in a directionally-constrained region using a spatial filter, enabling energetic DOA estimation and sound field characterization focused on specific angular areas. They formulated estimators and analyzed their behavior for fundamental cases like a single plane wave, uniform diffuse field, and mixtures.
This work presents a method for estimation of the acoustic intensity, the energy density and the associated sound field diffuseness around the origin, when the sound field is weighted with a spatial filter. The method permits energetic DOA estimation and sound field characterization focused in a specific angular region determined by the beam pattern of the spatial filter. The formulation of the estimators is presented and their behavior is analyzed for the fundamental cases useful in parametric sound field models of a single plane wave, a uniform diffuse field and a mixture of the two.