Signal detection thresholds re T_Q, i.e. thresholds in the presence of a masker re threshold in quiet, for the all-pass maskers with the 600-Hz (red) and the 4000-Hz (blue) signals in the asynchronous (A) and synchronous (B) timing conditions for all masker types in the S0M0 (signal and masker co-located straight ahead) spatial configuration.

<p>Thresholds close to zero indicate little masking and large threshold values indicate strong masking effects. Data from individual subjects are shown as markers in different shades. The box indicates the 25^th, 75^th and 50^th percentiles. Note that not all subjects were tested on all masker-signal combinations. To facilitate identification of individual subjects we ordered the subjects consistently throughout the plots. Subject order is: S31, S32, S33, S36, S37, S39, S42, S51, S55, S56, S57, S58, S59. eC = energetic constant frequency masker; eR = energetic random frequency masker; iC = informational constant frequency masker; iR = informational random frequency masker.