Speech intelligibility generally improves while spatial separation between target and masker increases, and this effect is known as spatial release from masking. The goal of this study is to examine the effect of spatial release from masking while the target by one speech sound presented twice from two locations in the horizontal plane. Two targets simulate an actual acoustical listening environment, such as a loudspeaker system or a broadcasting system, which has more than one loudspeaker. Two experiments by varying the location of the masker and the delayed target or the time of leading and lagging target are carried out to investigate the benefits of spatial release in a two-target situation and the importance of the locations and the time difference of targets in the speech intelligibility in the two-target listening test.
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