AUDITORY COGNITIVE NEUROSCIENCE EXPERIENCE LAB

LAB & LOCATION ☼ PEOPLE ☼ CURRENT FUNDING ☼ RESEARCH ☼ THE SOCIETY ☼ PUBLICATIONS ☼ SOUND GALLERY ☼ SLHS DEPARTMENT

SOUND GALLERY

We have provided links to some of the stimuli used in our lab and our collaborators’ labs. The stimuli are free to use for academic research and educational purpose; just be sure to cite the stimuli creator(s) and/or paper(s) that describe the stimuli.

---

Contributor: Sarah C. Sullivan, M.A., scsully@email.arizona.edu

Stimuli: 25 narrow-band noise bursts varying in center frequency

Studies: I have used these stimuli in a number of non-speech auditory categorization tasks. In these tasks, the noises were randomly sampled from two overlapping distributions and presented to subjects over headphones. Listeners were asked to identify the distribution from which each sound was drawn by pressing a button (labeled “A” and “B”). After a response was made, feedback was given regarding the correct answer. Study details can be obtained here from my 149^th ASA Vancouver poster presentation.

Usage: The stimuli are free to use for academic research and educational purposes. For all other uses, please obtain permission from Sarah Sullivan.

.wav files

Stimuli Details

Contributor: Joseph D.W. Stephens, Ph.D., jdstephe@ncat.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. (2011). A standard set of American-English voiced stop consonant stimuli from morphed natural speech. Speech Communication, 53, 877-888. 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.

The University of Arizona

Tucson