Purpose: This scoping review considers the acoustic features of a clear speech register directed to nonnative listeners known as foreigner-directed speech (FDS). We identify vowel hyperarticulation and low speech rate as the most representative acoustic features of FDS; other features, including wide pitch range and high intensity, are still under…

We propose a new framework for conceptualizing measures of instructed second language (L2) pronunciation performance according to three sets of parameters: (a) the constructs (focused on global vs. specific aspects of pronunciation), (b) the scoring method (human raters vs. acoustic analyses), and (c) the type of knowledge elicited (controlled vs.…

Discusses the design and interpretation of instrumental phonetic studies of second language (L2) speech production. The speech of L2 learners is evaluated to determine to what extent it diverges from the differing phonetic norms of L1, which are estimated from the speech of a small number of native speakers. (Author/LMO)