Thresholds for one- and two-band targets as a function of band center frequency.

<p>Thresholds are plotted as a function of band center frequency for targets spanning two octave-wide bands (left) or one octave-wide band (right). Filled symbols indicate thresholds obtained in the presence of unmodulated noise in the non-target bands (masked condition), and open symbols indicate that target bands were presented without flanking maskers (quiet condition). Each panel shows results for a different modulation rate, as indicated at the top of the panel. Error bars show one standard deviation, computed in log units.