Directional dependency of subjective sound pressure perception on three-dimensional sound
Sony launched 360 Reality Audio in 2019 that provides a new music experience using object-based spatial audio technology. In this music experience, sounds arrive from various directions. The direction from which the sound arrives affects the subjective sound pressure sensitivity[1,2,3]. Sivonen measured the subjective sound pressure sensitivity in seven directions on the left half of the horizontal plane and on the upper front quarter in the median plane(i.e.,21 conditions per level). In this e-brief, the number of directions is increased to 31, which includes the right half of the horizontal plane and the elevations lower than the front center for measurements with three band-limited signals(i.e.,93 conditions in total).As a result, 74 conditions are observed, each with a statistically significant difference.