This study describes the realization of onset and coda clusters in a 4-year old child acquiring American English, and with a higher than usual level of unintelligible speech. It reviews previous studies that have tested cluster realization against markedness and, in particular, the sonority hypothesis. This latter predicts steep rises in sonority…

This review examines the literature on the use of non-pulmonic egressive sounds in disordered speech. Studies are described that report the use of pulmonic ingressive speech, clicks, ejectives, and implosives. Broad trends are identified linking the use of each type of non-pulmonic-egressive airstream use with particular disorders. The importance…

During phonological development, children frequently produce consonant clusters as consonant singletons, a process commonly referred to as cluster reduction. The principles of sonority may provide a theoretical basis for explaining patterns of cluster reduction evident in children's speech. Two studies were conducted to investigate whether…

In this paper we report on an adult male participant with a rare form of progressive speech degeneration. We present acoustic phonetic data on his vowel and consonant production, and describe his prosody and syllable structure. We suggest possible phonological analyses of his speech, concluding that a gestural approach to phonology best…