| SEARCHING
FOR PHONOLOGICAL PROCESSING IN THE AUDITORY SYSTEM: II |
Damped,
Foreign, Inverted, Whispered, and Sinusoidal Vowels, plus Musical Rain |
Motivation
| In an effort to determine where the perception of
speech occurs in the brain, we have developed six sets of stimuli that
sound more or less like speech. Listeners have rated how speech like the
stimuli are and we will search for an area in the brain where the distribution
of activation across conditions resembles the perceptual ratings. |
Stimuli
| This figure illustrates a variety of spectrally matched vowel sounds, ranging from natural to unrecognisable : - a - Damped vowels (natural) b - foreign vowels c - inverted vowels d - whispered vowels e - sinusoidal vowels f - Musical rain (unrecognisable) |
Results
| Coming soon. |
References
| Uppenkamp S, Kothari A, Bailes, J, Patterson RD (2001) When is a vowel not a vowel? Brit J Audiology 35, 159 (A) |
| Griffiths TD, Uppenkamp S, Johnsrude I, Josephs O, Patterson RD (2001) Encoding of the temporal regularity of sound in the human brainstem. Nature Neuroscience 4, 633-637 |
| Patterson RD (1994) The sound of a sinusoid: time-interval models. J Acoust Soc Am 96, 1419-1428 |
| Hall DA, Haggard MP, Akeroyd MA, Palmer AR, Summerfield AQ, Elliott MR, Gurney EM, Bowtell RW (1999) “Sparse” temporal sampling in auditory fMRI. Hum. Brain Mapping 7, 213-223. |