Recently, some kinds of 3D sound rendering systems (such as Dolby Atmos, DTS:X, 22.2ch. etc.) are proposed and commercialized in audio industries. Similarity / difference in 3D sound localizations were examined by using sound intensity. Sound intensities are measured on different rendering systems in the same room, and also on the same rendering systems in different rooms. Subjective study to evaluate 3D sound rendering systems requires much time and labor. Evaluation by sound intensities, measured physically, is very useful. The session discusses interchangeability / difference of sound direction between rendering systems and between rooms obtained by analyzing the visual images and numerical data of sound localization.
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