14th International Congress of Phonetic Sciences (ICPhS-14)
San Francisco, CA, USA
Some perceptual characteristics of rising and falling third-formantlike tone glides were measured when the glides were presented in isolation, and in four more-or-less speechlike acoustic contexts. Glide levels at discrimination threshold were measured adaptively for five practised listeners in a two-interval procedure with feedback. The listeners' ability to categorise stimuli containing supra-threshold glides was also measured. If a phonetic mode of processing gave preferential access to information provided by the glides, lowest glide discrimination thresholds might have been expected for glides in the most speech-like context. However, thresholds were always lowest for glides in isolation. The data suggest that glide thresholds were more dependent on the masking effects of adjacent acoustic energy than on the likelihood that a stimulus was processed by a phonetic module.
Bibliographic reference. Bailey, Peter J. (1999): "Effects of acoustic context on discrimination thresholds for formant-like tone glides", In ICPhS-14, 183-186.