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Contributor: Joseph D.W.
Stephens, Ph.D., stephejd@wfu.edu
Stimuli: Eight 20-member
series of morphed VCV and CV acoustic stimuli. Consonants range from /b/ to /d/ or from /d/ to /g/, in
one of four vowel context: /i/, /æ/, /a/ or
/u/. The stimuli were created
by adjusting filter parameters of natural utterances derived from LPC
analysis and applying the adjusted filters to source waveforms extracted
from the natural tokens.
Studies:
The archives below contain acoustic stimuli for use in speech perception
research. The stimuli and the
methods used to create them are described in more detail in Stephens, J.D.W., & Holt,
L.L. (submitted). Please
cite the paper when using the stimuli.
Usage: The
stimuli are free to use for academic research and educational purposes. For
all other uses, please obtain permission from either Dr. Stephens or Dr. Holt.
Files
available for download:
VCV_stimuli.zip
CV_stimuli.zip
all_stimuli.zip
formant_frequencies.pdf
The files named VCV_stimuli.zip and CV_stimuli.zip each contain eight
20-member morphed series, arranged hierarchically within directories, e.g.:
-VCV_stimuli:
-a
-a_bd_VCV
-a_dg_VCV
-ae
-ae_bd_VCV
-ae_dg_VCV
-i
-i_bd_VCV
-i_dg_VCV
-u
-u_bd_VCV
-u_dg_VCV
The directories corresponding to each vowel in VCV_stimuli.zip
also include the original recorded utterances as well as the edited
versions of the recordings and source waveforms used as input in the
morphing procedure.
The file named all_stimuli.zip contains all
320 stimuli and associated files within a single directory.
The file named formant_frequencies.pdf
contains the table of measured formant frequencies given in Appendix B of
the paper.
Researchers are advised to refer to the paper cited above and to the online
documentation for important information regarding the acoustic and
perceptual properties of the stimuli. The stimuli may also be obtained via
electronic mail (lholt@andrew.cmu.edu)
or in CD format by postal mail addressed to Lori Holt, Psychology
Department, 5000
Forbes Ave., Pittsburgh, PA 15213.
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