When two primary tones in the frequency ratiof1:f2 = 2:3are presented to human listeners, a combination tone is audible atf1/2. The loudness of this combination tone depends on the phase angle between the two primary tones. We measured the amplitude and phase of the combination tone using a cancellation‐ plus probe‐tone technique. The phase effect can be explained by interaction of a second‐order distortion productf2−f1and a third‐order distortion product2f1−f2of approximately equal intensities. The intensity relative to the primary tones of both distortion products is influenced strongly by frequency of the primary tones and weakly by intensity of the primary tones.