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Contributions: A major goal of the ACNS is to create an online auditory stimuli resource bank.  Please help us accomplish this goal!  If you have stimuli that you would like to share with others through this site, contact Sarah Sullivan. 


Please include any details that your fellow researchers might find useful (i.e., name and contact information of contributor, name and contact information of the person (or people) that created the stimuli, a description of the studies or references in which the stimuli were used, details on how the stimuli were created, and any problems you have noted regarding the stimuli).  Please use the below contribution(s) as a guide.  






Contributor: Sarah C. Sullivan, M.A.,


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 149th 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.,


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:

The files named and each contain eight 20-member morphed series, arranged hierarchically within directories, e.g.:
















The directories corresponding to each vowel in 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 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 ( or in CD format by postal mail addressed to Lori Holt, Psychology Department, 5000 Forbes Ave., Pittsburgh, PA 15213.


The University of Arizona