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.
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).
Delayed auditory feedback has been used with a directional microphone and speaker to create a device intended to silence an individual speaker using the mental stress induced in people unused to the effect.
There are now also different mobile apps available that use DAF in phone calls.
- DAF/FAF Aid for iOS devices (iPhone/iPad/iPod touch)
- Windows based DAF/FAF
- Android DAF App for phone calls
- Badian, M. et al. (1979). "Standardized mental stress in healthy volunteers induced by delayed auditory feedback (DAF)". European Journal of Clinical Pharmacology 16 (3): 171–6. doi:10.1007/BF00562057. PMID 499316.
- Perkell, J. et al. (1997). "Speech Motor Control: Acoustic Goals, Saturation Effects, Auditory Feedback and Internal Models". Speech Communication 22 (2–3): 227–250. doi:10.1016/S0167-6393(97)00026-5.
- Dydymus, J. T. (3 March 2012). "Japanese develop 'SpeechJammer' gun". Digital Journal. Retrieved 3 March 2012.
- Kurihara, K; Tsukada, K. (2012). "SpeechJammer: A System Utilizing Artificial Speech Disturbance with Delayed Auditory Feedback". arXiv:1202.6106 [cs.HC].
- Bilanovic, V. (13 September 2012). "DAF App for Android Phones". Retrieved 13 September 2012.
- Ball, M. J.; Code, C. (1984). Experimental Clinical Phonetics: Investigatory Techniques in Speech Pathology and Therapeutics. Croom Helm. p. 129. ISBN 0-7099-0730-3.
- Lachman, J. L. (1979). Cognitive Psychology and Information Processing: An Introduction. Lawrence Erlbaum. p. 203. ISBN 0-89859-131-7.
- Orlikoff, R. F.; Baken, R. J. (2000). Clinical Measurement of Speech and Voice. Singular. p. 109. ISBN 1-56593-869-0.