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Thresholds for detection of the stimulus in various closed-field masker (symbol types) and signal (abscissa) conditions. Each panel shows data from one listener. Paired abscissa labels indicate signal IPD and ILD as 0 or π radian IPD, and 0 or 5 dB ILD. Black and gray fills indicate 0 and 5 dB ILD, respectively. Diamonds and circles represent UN and CM conditions, respectively. Masker levels were fixed at 72 dB SPL.
