Binaural frequency difference limens in noise were obtained under homophasic and antiphasic conditions. Signal frequencies of 200, 300, 500, 700, and 1000 Hz were investigated at 5‐ and 10‐dB sensation levels while 500 Hz was also explored at 15, 20, and 25 dB. The masker was a bandlimited noise with a spectrum level of 55 dB. Results indicate significant changes in discrimination behavior as a function of phase condition and sensation level. Alternative interpretations of the data are considered.