We conducted seven subjective experiments in order to clarify the effects of the arrival direction and spatial distribution of reflections on listener envelopment (LEV). As a result, it became clear that the contribution of a reflection to LEV depends on the arrival direction of other reflections, and that making independent evaluation is not entirely a possibility. For our sound fields, LEV cannot be optimally evaluated with objective measures that weight and integrate individual reflections by the arrival direction like that of lateral energy ratios.
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