FIG. 1.

The simultaneous growth of the magnitudes of dynamic ITDs and ILDs evoked by adding an antiphasic tone Sπ to a diotic noise N0 (A). The arrowhead indicates the direction of increasing Sπ/N0 ratio. This curve provides the gauge for comparing the relative strengths of ITDs and ILDs (see text). B The combined effect of binaural modulation and the addition of the Sπ tone. Different symbols indicate different modulation types: binaural QFM (stars), binaural AM (x marks), and mixed binaural modulation (diamonds). The dashed line is replotted from A. The white circle indicates an N0Sπ stimulus with S/N = −13 dB; the arrows show how ITDs and ILDs are affected when this N0Sπ stimulus is subjected to different types of binaural modulation. In all cases, the binaural metrics were evaluated on a 100-Hz-wide noise band around 500 Hz. The magnitudes are expressed as RMS over the stimulus duration.