The first edition of this book has enjoyed a gratifying existence. 1s sued in 1965, it found its intended place as a research reference and as a graduate-Ievel text. Research laboratories and universities reported broad use. Published reviews-some twenty-five in number-were universally kind. Subsequently the book was translated and published in Russian (Svyaz; Moscow, 1968) and Spanish (Gredos, S.A.; Madrid, 1972). Copies of the first edition have been exhausted for several years, but demand for the material continues. At the behest of the publisher, and with the encouragement of numerous colleagues, a second edition was begun in 1970. The aim was to retain the original format, but to expand the content, especially in the areas of digital communications and com puter techniques for speech signal processing. As before, the intended audience is the graduate-Ievel engineer and physicist, but the psycho physicist, phonetician, speech scientist and linguist should find material of interest."

Speech Analysis, Synthesis and Perception

Empirical studies are essential to improving our understanding of the relationship between accent and pronunciation teaching. However, the study of pronunciation has been marginalized within the field of applied linguistics. As a result, teachers are often left to rely on their own intuitions with little direction. Although some instructors can successfully assist their students under these conditions, many others are reluctant to teach pronunciation. In this article we call for more research to enhance our knowledge of the nature of foreign accents and their effects on communication. Research of this type has much to offer to teachers and students in terms of helping them to set learning goals, identifying appropriate pedagogical priorities for the classroom, and determining the most effective approaches to teaching. We discuss these possibilities within a framework in which mutual intelligibility is the primary consideration, although social ramifications of accent must also be taken into account. We describe several problem areas and identify some misconceptions about pronunciation instruction. In addition, we make suggestions for future research that would address intelligibility, functional load, computer-assisted language learning, and the role of the listener. Finally, we recommend greater collaboration between researchers and practitioners, such that more classroomrelevant research is undertaken.

https://www.jstor.org/stable/info/3588486

Second Language Accent and Pronunciation Teaching: A Research- Based Approach.

Second language acquisition (SLA) is a field that investigates child and adult SLA from a variety of theoretical perspectives. This article provides a survey of some key areas of concern including formal generative theory and emergentist theory in the areas of morpho-syntax and phonology. The review details the theoretical stance of the two different approaches to the nature of language: generative linguistics and general cognitive approaches. Some results of key acquisition studies from the two theoretical frameworks are discussed. From a generative perspective, constraints on wh-movement, feature geometry and syllable structure, and morphological development are highlighted. From a general cognitive point of view, the emergence of tense and aspect marking from a prototype account of inherent lexical aspect is reviewed. Reference is made to general cognitive learning theories and to sociocultural theory. The article also reviews individual differences research, specifically debate on the critical period in adult language acquisition, motivation, and memory. Finally, the article discusses the relationship between SLA research and second language pedagogy. Suggestions for further reading from recent handbooks on SLA are provided. WIREs Cogni Sci 2011 2 277-286 DOI: 10.1002/wcs.106 For further resources related to this article, please visit the WIREs website.

Second language acquisition.

In learning to perceive and produce speech, children master complex language-specific patterns. Daunting language-specific variation is found both in the segmental domain and in the domain of prosody and intonation. This article reviews the challenges posed by results in phonetic typology and sociolinguistics for the theory of language acquisition. It argues that categories are initiated bottom-up from statistical modes in use of the phonetic space, and sketches how exemplar theory can be used to model the updating of categories once they are initiated. It also argues that bottom-up initiation of categories is successful thanks to the perception-production loop operating in the speech community. The behavior of this loop means that the superficial statistical properties of speech available to the infant indirectly reflect the contrastiveness and discriminability of categories in the adult grammar. The article also argues that the developing system is refined using internal feedback from type statistics over the lexicon, once the lexicon is well-developed. The application of type statistics to a system initiated with surface statistics does not cause a fundamental reorganization of the system. Instead, it exploits confluences across levels of representation which characterize human language and make bootstrapping possible.

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Phonetic diversity, statistical learning, and acquisition of phonology

Preface Acknowledgments 1. Introduction 2. The Dispersion Theory of Contrast 3. Ways of Maximizing Distinctiveness 4. Consonant-Vowel Assimilation 5. Neutralization 6. Minimization of Allomorphy 7. Conclusions References Index

Auditory Representations in Phonology

In an earlier study, we evaluated the effectiveness of several acoustic measures in predicting breathiness ratings for sustained vowels spoken by nonpathological talkers who were asked to produce nonbreathy, moderately breathy, and very breathy phonation (Hillenbrand, Cleveland, & Erickson, 1994). The purpose of the present study was to extend these results to speakers with laryngeal pathologies and to conduct tests using connected speech in addition to sustained vowels. Breathiness ratings were obtained from a sustained vowel and a 12-word sentence spoken by 20 pathological and 5 nonpathological talkers. Acoustic measures were made of (a) signal periodicity, (b) first harmonic amplitude, and (c) spectral tilt. For the sustained vowels, a frequency domain measure of periodicity provided the most accurate predictions of perceived breathiness, accounting for 92% of the variance in breathiness ratings. The relative amplitude of the first harmonic and two measures of spectral tilt correlated moderately with breathiness ratings. For the sentences, both signal periodicity and spectral tilt provided accurate predictions of breathiness ratings, accounting for 70%-85% of the variance.

/pdf/acoustic-correlates-of-breathy-vocal-quality-dysphonic-wwjz50di1i.pdf

Acoustic Correlates of Breathy Vocal Quality: Dysphonic Voices and Continuous Speech

This study was designed to examine the role of duration in vowel perception by testing listeners on the identification of CVC syllables generated at different durations. Test signals consisted of synthesized versions of 300 utterances selected from a large, multitalker database of /hVd/ syllables [Hillenbrand et al., J. Acoust. Soc. Am. 97, 3099–3111 (1995)]. Four versions of each utterance were synthesized: (1) an original duration set (vowel duration matched to the original utterance), (2) a neutral duration set (duration fixed at 272 ms, the grand mean across all vowels), (3) a short duration set (duration fixed at 144 ms, two standard deviations below the mean), and (4) a long duration set (duration fixed at 400 ms, two standard deviations above the mean). Experiment 1 used a formant synthesizer, while a second experiment was an exact replication using a sinusoidal synthesis method that represented the original vowel spectrum more precisely than the formant synthesizer. Findings included (1) duration ...

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Some effects of duration on vowel recognition

Glottal stops that occur in vowel-consonant-vowel context are often not realized as stops at all, but rather show voicing that is continuous throughout the glottal constriction gesture. Glottal art...

Role of F0 and Amplitude in the Perception of Intervocalic Glottal Stops

The purpose of this paper is to propose and evaluate a new model of vowel perception which assumes that vowel identity is recognized by a template-matching process involving the comparison of narrow band input spectra with a set of smoothed spectral-shape templates that are learned through ordinary exposure to speech. In the present simulation of this process, the input spectra are computed over a sufficiently long window to resolve individual harmonics of voiced speech. Prior to template creation and pattern matching, the narrow band spectra are amplitude equalized by a spectrum-level normalization process, and the information-bearing spectral peaks are enhanced by a "flooring" procedure that zeroes out spectral values below a threshold function consisting of a center-weighted running average of spectral amplitudes. Templates for each vowel category are created simply by averaging the narrow band spectra of like vowels spoken by a panel of talkers. In the present implementation, separate templates are used for men, women, and children. The pattern matching is implemented with a simple city-block distance measure given by the sum of the channel-by-channel differences between the narrow band input spectrum (level-equalized and floored) and each vowel template. Spectral movement is taken into account by computing the distance measure at several points throughout the course of the vowel. The input spectrum is assigned to the vowel template that results in the smallest difference accumulated over the sequence of spectral slices. The model was evaluated using a large database consisting of 12 vowels in /hVd/ context spoken by 45 men, 48 women, and 46 children. The narrow band model classified vowels in this database with a degree of accuracy (91.4%) approaching that of human listeners.

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A narrow band pattern-matching model of vowel perception

The articulatory behavior of the tongue body was observed and related to the phonemic representation of speech through the use of cineradiography at 100 frames/sec. Specific points on the tongue‐body surface were identified by the attachment of small radiopaque markers. Points on the jaw and each lip were also marked. The motion of these markers was observed during the production of nonsense trisyllables constructed from /i/, /ɑ/, /u/, /b/, /g/ in the form V1 CV2 CV1, with various conditions of stress as produced by a single speaker. Target positions were identified for each point marker corresponding to each phoneme. The transitions between target positions were observed. It was determined that the principal motion between vowel target positions could be characterized by a single characteristic transition function. Deviations from this principal intertarget motion that appear to be related to perturbations in oral pressure were observed.

Robert A. Houde

Papers

Acoustic Correlates of Breathy Vocal Quality: Dysphonic Voices and Continuous Speech

Some effects of duration on vowel recognition

Role of F0 and Amplitude in the Perception of Intervocalic Glottal Stops

A narrow band pattern-matching model of vowel perception

Tongue‐Body Motion during Selected Speech Sounds