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Work by Hawkins, Hirsh, Licklider, Webster, and others has shown the considerable reduction in masking which occurs when the phase of either the signal or the noise is reversed, or when the phase of the signal is shifted by various amounts. The present paper extends this work by shifting the interaural phases of the masking component of the noise by various amounts between +180° and −180°. The interaural phases of both the noise and the tone are therefore parameters of this study. The results are in agreement with those already published, but show in addition large reductions in thresholds when the noise and tone differ in phase, even when neither has been reversed.
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Jeffress et al. (1952) studied this question.
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