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The origin of binaural interaction in the modulation domain
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10.1121/1.3327798
/content/asa/journal/jasa/127/4/10.1121/1.3327798
http://aip.metastore.ingenta.com/content/asa/journal/jasa/127/4/10.1121/1.3327798

Figures

Image of FIG. 1.
FIG. 1.

Illustration of modulator waveforms (without dc component) presented to the left and right ears for a starting probe phase (as defined in Eqs. (1) and (2)) of 90°. The top panels show waveforms for the maskers alone [ and , for the left and right ears, respectively], the middle panels show waveforms for the probe alone [ and ], and the bottom panels show the waveforms [ and ].

Image of FIG. 2.
FIG. 2.

As Fig. 1, but for a starting probe phase of 225°.

Image of FIG. 3.
FIG. 3.

Individual and mean results for experiment 1. The detection threshold for the probe modulation is plotted as a function of the starting phase of the probe modulator. For the individual results, error bars indicate ±1 standard deviation (SD) across repeated runs. For the mean results, error bars indicate ±1 SD across subjects. Filled symbols on the left of each panel show probe detection thresholds measured with no masker (squares), a 50 Hz masker with (inverted triangles), and a 50 Hz masker with (hexagons). In the last two cases, the masker modulator was applied to the left ear only.

Image of FIG. 4.
FIG. 4.

Individual and mean results for experiment 2. The detectability of the probe modulation, , is plotted as a function of the probe modulation depth for two starting phases of the probe, 90° and 225°.

Image of FIG. 5.
FIG. 5.

As Fig. 1, but with the masker modulation frequency for the right ear set to 27.5 Hz.

Image of FIG. 6.
FIG. 6.

As Fig. 2, but with the masker modulation frequency for the right ear set to 27.5 Hz.

Image of FIG. 7.
FIG. 7.

As Fig. 3, but showing results for experiment 3, with the masker modulation frequency for the right ear set to 27.5 Hz.

Image of FIG. 8.
FIG. 8.

As Fig. 4, but showing results for experiment 4, with the masker modulation frequency for the right ear set to 27.5 Hz.

Image of FIG. 9.
FIG. 9.

Output of the loudness model described in the text, showing short-term loudness as a function of time. The solid line is for the masker modulator alone (50 Hz in one ear and 55 Hz in the other).

Image of FIG. 10.
FIG. 10.

The top panel shows the modulation waveform (without dc component) resulting from summing the 50 Hz and 27.5 Hz modulators, each with . The middle panel reproduces that waveform and also shows the Hilbert envelope of the waveform as a thick line. The bottom panel shows the same waveform, together with a 5 Hz sinewave that has been scaled to coincide with the major peaks of the waveform.

Tables

Generic image for table
TABLE I.

Comparison of mean obtained probe modulation depths at threshold from experiment 1 (using masker modulators with frequencies of 50 and 55 Hz), with predictions derived using the loudness model described in the text. The data are the same as shown in Fig. 3.

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/content/asa/journal/jasa/127/4/10.1121/1.3327798
2010-04-05
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: The origin of binaural interaction in the modulation domain
http://aip.metastore.ingenta.com/content/asa/journal/jasa/127/4/10.1121/1.3327798
10.1121/1.3327798
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