Examining the effect of high-frequency information on the classification of conversationally produced English fricativesa).

This study examines the role of frequencies above 8 kHz in the classification of conversational speech fricatives [f, v, θ, ð, s, z, ʃ, ʒ, h] in random forest modeling. Prior research has mostly focused on spectral measures for fricative categorization using frequency information below 8 kHz. The contribution of higher frequencies has received only limited attention, especially for non-laboratory speech.

Temporal and spectral characteristics of conversational versus read fricatives in American English.

The present study compares the production of fricatives in conversational versus read speech in American English. The goal is to examine which parameters contribute to the identification of fricatives across the two speech styles. The study surveys over 162 000 fricative tokens from the Buckeye Corpus [Pitt, Johnson, Hume, Kiesling, and Raymond (2005).

Phonetic Effects in the Perception of VOT in a Prevoicing Language.

Previous production studies have reported differential amounts of closure voicing in plosives depending on the location of the oral constriction (anterior vs. posterior), vocalic context (high vs. low vowels), and speaker sex.

The Phonetic Realization of Devoiced Vowels in the Southern Ute Language.

In this article, we analyze the phonetic realizations of devoiced vowels from 8 fluent speakers of Southern Ute, a severely endangered Southern Numic Uto-Aztecan language spoken in Southwestern Colorado. Devoiced vowels are considered to be an important aspect of the phonology of Southern Ute, yet very little is known about the pronunciation of such segments. Our findings indicate that devoiced vowels are realized phonetically in three ways: (i) fully voiceless, (ii) partially devoiced, and (iii) fully reduced with concurrent lengthening, lower intensity and greater voicelessness of the preceding consonant.

Behavioral and electrophysiological evidence for early and automatic detection of phonological equivalence in variable speech inputs.

Speech sounds are not always perceived in accordance with their acoustic-phonetic content. For example, an early and automatic process of perceptual repair, which ensures conformity of speech inputs to the listener's native language phonology, applies to individual input segments that do not exist in the native inventory or to sound sequences that are illicit according to the native phonotactic restrictions on sound co-occurrences. The present study with Russian and Canadian English speakers shows that listeners may perceive phonetically distinct and licit sound sequences as equivalent when the native language system provides robust evidence for mapping multiple phonetic forms onto a single phonological representation.