Independent components of natural binaural sounds.

<p>A) An explanation of the ICA model. Each epoch of binaural sound (left hand side of the equation) is represented by a linear combination of basis functions (or independent components). Coefficients are assumed to be sparse and their joint distribution is equal to the product of marginals. B) Exemplary ICA basis functions from each recorded scene. Nocturnal nature and city center scenes consisted mostly of harmonic sounds and are mostly represented by ICs resembling Fourier bases. The forest walk scene included multiple transient sounds, which gave rise to wavelet-like features.