Delayed Auditory Feedback

Delayed Auditory Feedback (DAF), is a device that enables a user of the device to speak into a microphone and then hear his or her voice in headphones a fraction of a second later. Some DAF devices are hardware; DAF computer software is also available.

DAF usage (with a 175 millisecond delay) has been proven to induce mental stress.^[1]

Electronic fluency devices use delayed auditory feedback and have been used as a technique to aid with stuttering.

Delayed auditory feedback devices are used for example in speech perception experiments, in order to demonstrate the importance of auditory feedback in speech perception as well as in speech production (see e.g. Perkell et al. 1997).

External links

• Computer-based DAF/FAF
• iPhone implementation of DAF/FAF
• Android implentation of DAF/FAF

References

• Ball, Martin J.; Code, Christopher (1984). Experimental clinical phonetics: investigatory techniques in speech pathology and therapeutics. London: Croom Helm. ISBN 0-7099-0730-3. http://books.google.ca/books?id=QjwOAAAAQAAJ&pg=PA129. 
• Lachman, Janet L. (1979). Cognitive Psychology and Information Processing: An Introduction. Hillsdale, N.J: Lawrence Erlbaum. ISBN 0-89859-131-7. http://books.google.ca/books?id=W4GPnZ2qeWkC&pg=PA203. 
• Robert F. Orlikoff; Ronald J. Baken (2000). Clinical measurement of speech and voice. San Diego: Singular. ISBN 1-56593-869-0. http://books.google.ca/books?id=ElPyvaJbDiwC&pg=PA109. 
• Perkell J, Matthies M, Lane H, Guenther F, Wilhelms-Tricarico R, Wozniak J, Guiod P (1997) Speech motor control: Acoustic goals, saturation effects, auditory feedback and internal models. Speech Communication 22, 227-250

1. ^ "Standardized mental stress in healthy volunteers induced by delayed auditory feedback (DAF)". Springer Link. http://www.springerlink.com/content/m0p284p46u3500l1/. Retrieved 2007-03-10.