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A, Schematic display of the test setup when two participants were present. Participants were oriented at a 140° angle from each other and were placed so that the center of their head was 2-m away from the speaker. B, Schematic representation of a test session. Participant A always repeated odd-numbered sentences, while participant B always repeated even-numbered sentences. They did this both alone and together at three different intelligibility levels, the order of which was randomized.
