Figure 1.
The percentage of a 2-stream percept in relation to the modulation frequency of the B SAM tone.
The percentage of a 2-stream percept depicted in relation to the modulation frequency of the B SAM tone in octaves (with reference to 1 Hz). Each of the four blocks represent data for a specific modulation depth (%) and presentation time (s). The two columns within each block represent data for different carrier frequencies (Hz). A vertical black line indicates the position of the reference modulation frequency fmodA, which is also indicated on the right hand side of each row of panels. The error bars denote the standard error and the coloured symbols indicate data obtained for the three different tone patterns (shortly denoted as TD/SOAacross).
Table 1.
Results of the statistical analysis of the percentage of a 2-stream percept.
Figure 2.
The percentage of a 2-stream percept in relation to the modulation frequency of the B SAM tone while a continuous pink noise masker is presented.
The percentage of a 2-stream percept depicted in relation to the modulation frequency of the B SAM tone in octaves (with reference to 1 Hz). The two blocks represent data for a modulation depth of 100% with two different presentation times (5 and 15 s, respectively). The two columns within each block represent data for the different carrier frequencies (Hz). A vertical black line indicates the position of the reference modulation frequency fmodA, which is also indicated on the right hand side of each row of panels. The error bars denote the standard error and the coloured symbols indicate data obtained for the three different tone patterns (shortly denoted as TD/SOAacross).
Figure 3.
The subjects' mean 50% thresholds of 2-stream responses and corresponding modelled excitation patterns.
The subjects' mean 50% thresholds of 2-stream responses calculated from observed data (dark colours) and modelled excitation patterns (pale colours). The panels show data for different carrier frequencies (fc in columns) and modulation depths (m in rows). The data is grouped by tone pattern (shortly denoted as TD/SOAacross; colours), and labelled with the reference modulation frequency in Hz within each group. The error bars denote the standard error. The arrows mark the three conditions used to fit the model data to the observed data.
Figure 4.
Modelled spectral excitation patterns for selected conditions.
Modelled spectral excitation patterns in arbitrary “model units” (MU) for selected conditions (parameters given in the panel titles). Each panel shows, for the respective condition, one excitation pattern (dotted line) at the reference modulation frequency (fmodA), one excitation pattern (solid line) at the 50% threshold of 2-stream responses calculated from the measured data (values given in the legends) and one excitation pattern at the maximal octave separation measured (dashed line). The excitation patterns reflect the mean model activation during presentation of the B tone excluding the silent gaps occurring in some of the conditions. The different colours indicate the tone pattern (shortly denoted as TD/SOAacross) as in the other figures.