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Temporal properties of perceptual calibration to local and broad spectral characteristics of a listening context
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10.1121/1.3500693
/content/asa/journal/jasa/128/6/10.1121/1.3500693
http://aip.metastore.ingenta.com/content/asa/journal/jasa/128/6/10.1121/1.3500693

Figures

Image of FIG. 1.
FIG. 1.

Corner stimuli of the target vowel matrix used for all experiments. Stimuli in the left column have the most [u]-like F 2 frequency (1000 Hz, dashed arrow) and stimuli in the right column have the most [i]-like F 2 frequency (2200 Hz, dotted arrow). Stimuli in the upper row have the most [i]-like tilt spectral tilt (0 dB/oct, dotted line) and stimuli in the bottom row have the most [u]-like spectral tilt (−12 dB/oct, dashed line).

Image of FIG. 2.
FIG. 2.

Sample 1000-ms precursors with 4-Hz modulation rate for experiment 1A. (a) Time waveform and spectrogram for a sample precursor filtered to have a spectral peak that matched the F 2 frequency (1000 Hz) of the following vowel. (b) Spectrum of (a). (c) Time waveform and spectrogram for a sample precursor filtered to have a spectral peak that matched the F 2 frequency (2200 Hz) of the following vowel. (d) Spectrum of (c). Note that because the spectral composition of precursors was modulated, additional energy corresponding to target F 2 increased and decreased across the duration of precursors.

Image of FIG. 3.
FIG. 3.

Sample 1000-ms precursors with 4-Hz modulation rate for experiment 1B. (a) Time waveform and spectrogram for a sample precursor with −12 dB/oct spectral tilt. (b) Spectrum of (a). (c) Time waveform and spectrogram for a sample precursor with 0 dB/oct spectral tilt. (d) Spectrum of (c).

Image of FIG. 4.
FIG. 4.

(a) Mean identification rates for vowels in isolation (i.e., no precursors) with probability of responding /i/ as a function of F 2 frequency plotted separately for each vowel tilt. Circles, asterisks, squares, x’s, and triangles represent mean data for vowel tilts of −12, −9, −6, −3, and 0 dB/oct, respectively. Maximum likelihood fits of identification rates are displayed for mean data at each vowel tilt as different lines (see legend). (b) Scatter plot of F 2 (abscissa) and tilt (ordinate) weights (standardized regression coefficients) for each listener in the control condition plotted as open circles. x’s indicate excluded multivariate outliers and the filled circle is the mean of the remaining data.

Image of FIG. 5.
FIG. 5.

Plotted in different panels are mean identification rates for different durations of F 2-matched precursors in experiment 1A. See Fig. 4(a) caption for details.

Image of FIG. 6.
FIG. 6.

Scatter plots of individual F 2 and tilt weights (open circles) for each duration of F 2-matched precursors in experiment 1A. x’s indicate excluded multivariate outliers, the filled circle is the mean of the remaining data, and the filled square is the mean of the control condition from Fig. 4(b).

Image of FIG. 7.
FIG. 7.

For experiments 1 and 2 (top and bottom panels, respectively), the change in F 2 weights (solid bars) and tilt weights (speckled bars) attributed to F 2-matched precursors (left panels) and tilt-matched precursors (right panels) are plotted as a function of precursor duration. Error bars represent standard error.

Image of FIG. 8.
FIG. 8.

Plotted in different panels are mean identification rates for different durations of tilt-matched precursors in experiment 1B. See Fig. 4(a) caption for details.

Image of FIG. 9.
FIG. 9.

Scatter plots of individual F 2 and tilt weights for each duration of tilt-matched precursors in experiment 1B. See Fig. 6 caption for details.

Image of FIG. 10.
FIG. 10.

Spectrograms of sample precursors with 2-, 4-, or 8-Hz modulation rates (top, middle, and bottom panels, respectively) for experiment 2A that were filtered to have a spectral peak that matched the F 2 frequency (1600 Hz) of the following vowel. Increases in modulation rate increases the number of times the full spectrum is sampled.

Image of FIG. 11.
FIG. 11.

Mean identification rates for 2- and 8-Hz modulation rates of F 2-matched precursors in experiment 2A are plotted in panels (a) and (b), respectively. 2- and 8-Hz modulation rates of tilt-matched precursors in experiment 2B are plotted in panels (c) and (d), respectively. See Fig. 4(a) caption for details.

Image of FIG. 12.
FIG. 12.

Scatter plots of individual F 2 and tilt weights for 2- and 8-Hz modulation rates of F 2-matched precursors in experiment 2A are plotted in panels (a) and (b), respectively. 2- and 8-Hz modulation rates of tilt-matched precursors in experiment 2B are plotted in panels (c) and (d), respectively. See Fig. 6 caption for details.

Tables

Generic image for table
TABLE I.

Means across listeners in experiments 1A (F 2-matched precursors) and 1B (tilt-matched precursors) of standardized logistic regression weights for F 2 and tilt at each precursor duration (standard errors in parentheses). Mean F 2 and tilt weights and standard errors for vowel targets in isolation were 1.94 (0.15) and 0.47 (0.08), respectively.

Generic image for table
TABLE II.

Means across listeners in experiments 2A (F 2-matched precursors) and 2B (tilt-matched precursors) of standardized logistic regression weights for F 2 and tilt at different sinusoidal modulation rates (standard errors in parentheses). Data for the 4-Hz condition are from 500-ms precursors in experiment 1.

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/content/asa/journal/jasa/128/6/10.1121/1.3500693
2010-12-01
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Temporal properties of perceptual calibration to local and broad spectral characteristics of a listening context
http://aip.metastore.ingenta.com/content/asa/journal/jasa/128/6/10.1121/1.3500693
10.1121/1.3500693
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