Continuous and categorical perception of a fricative-affricate continuum

Ferrero, Franco; Pelamatti, Giovanna; Vagges, Kyriaki; Umiltà, Carlo

doi:10.1016/s0095-4470(19)30984-2

Cited by 6 publications

(3 citation statements)

References 16 publications

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“…The acoustical frequencies have distinct peaks multiples of about 147 Hz with the highest amplitude peak at about 590 Hz. They bring the information on the formants, which are easily recognizable with estimated values in agreement with those reported in [27,28]. The laser signal depicted in figure 2(c) shows a very interesting behaviour: The absolute maxima repeated at about 1 s The measurements have been contemporarily acquired with the vibrometer (CH1) pointing to the trachea.…”

Section: Experimental Systemsupporting

confidence: 85%

Experimental study of self-oscillations of the trachea–larynx tract by laser doppler vibrometry

Buccheri

Lauro

Martino

et al. 2016

Biomed. Phys. Eng. Express

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We study the acoustical and mechanical vibration fields generated when Italian speakers emit Italian vowels in order to individuate the role played by the trachea in the speech production mechanism. Specifically, experimental series regard the mechanical vibrations along the trachea-larynx tract measured by using non-contact laser Doppler vibrometry (LDV), contemporaneously we acquire the acoustical field by means of a set of microphones. The experimental apparatus consists of two LDV systems and two microphones: this allows to have synchronized recorded signals to be compared, thus to get information about the vibration field propagation. The two lasers are pointed along the thorax scanning along the tracheal tract. We observe that the trachea displays significant self-oscillations that cannot be avoided in the speech production. In particular, a clear self-oscillation at the frequency related to the pitch is extracted by independent component analysis. Thanks to the two synchronized LDV systems, we observe that the mechanical oscillations at the trachea start before those of the larynx and the acoustic oscillations, indicating that a mechanical oscillation is upward propagating. These experiments support the hypothesis that a further hydrodynamic instability should be advocated in the speech production mechanism at trachea level. Moreover, the pitch, typically extracted by looking at the inter-times in the acoustical signals, is directly obtained by measuring the mechanical vibrations of the trachea.

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Section: Experimental Systemsupporting

confidence: 85%

Experimental study of self-oscillations of the trachea–larynx tract by laser doppler vibrometry

Buccheri

Lauro

Martino

et al. 2016

Biomed. Phys. Eng. Express

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“…Thus, discrimination performance along the continuum was predicted largely by category membership, a pattern of responding that violates Weber's law and was named categorical perception. This finding has been extensively replicated in both speech (e.g., Ferrero, Pelamatti, & Vagges, 1982;Kopp, 1969;Larkey, Wald, & Strange, 1978;Liberman, Harris, Kinney, & Lane, 1961;Philips et al, 2000;M. E. H. Schouten & Van Hessen, 1992;Sharma & Dorman, 1999) and nonspeech domains (e.g., Beale & Keil, 1995;Bornstein & Korda, 1984;Freedman, Riesenhuber, Poggio, & Miller, 2001;Howard, Rosen, & Broad, 1992;Newell & Bu ¨lthoff, 2002;Quinn, 2004).…”

mentioning

confidence: 68%

Gradient sensitivity to within-category variation in words and syllables.

McMurray

Aslin

Tanenhaus

et al. 2008

Journal of Experimental Psychology: Human Perception and Perfor

141

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Five experiments monitored eye movements in phoneme and lexical identification tasks to examine the effect of within-category sub-phonetic variation on the perception of stop consonants. Experiment 1 demonstrated gradient effects along VOT continua made from natural speech, replicating results with synthetic speech (McMurray, Tanenhaus & Aslin, Cognition, 2002). Experiments 2-5 used synthetic VOT continua to examine effects of response alternatives (2 vs. 4), task (lexical vs. phoneme decision), and type of token (word vs. CV). A gradient effect of VOT in at least one half of the continuum was observed in all conditions. These results suggest that during on-line spoken word recognition lexical competitors are activated in proportion to their continuous distance from a category boundary. This gradient processing may allow listeners to anticipate upcoming acoustic/phonetic information in the speech signal and dynamically compensate for acoustic variability. KeywordsSpeech Perception; Categorical Perception; Word Recognition; Subphonemic Sensitivity; Visual World ParadigmThe remarkable ability of human listeners to understand spoken language stands in stark contrast to the highly variable acoustic cues that signal phonemic distinctions. Attempts to find context-independent or invariant cues to simple phonetic features such as place of Corresponding Author: Bob McMurray, Department of Psychology, E11 SSH, University of Iowa, Iowa City, IA 52242, bobmcmurray@uiowa.edu, 319-335-2408 (phone), 319-335-0191 (fax). 9 We were surprised that Experiment 2 shows gradient effects despite the steep labeling function, whereas Experiment 3, with a more continuous labeling function does not. We conducted detailed analyses of the timecourse in order to understand these conflicting results. Two factors appear to conspire to drive these effects. First, Experiment 2 has extremely low variability, making it possible to detect even small differences. Second, our analyses suggest that the, likelihood of detecting gradiency depends on the overall proportion of fixations to competitors. There were relatively more fixations to competitors in Experiment 2 than in Experiment 3, perhaps driven by the fact that there were no other objects on the screen. Details of these analyses are available from the first author. articulation have met with little success, suggesting that simple invariants do not exist and that speech perception must employ at least partial context-dependent sensitivity. At its heart, the search for invariant acoustic cues in the speech signal is based on the assumption that perception is fundamentally a problem of transforming a continuous and contextually varying signal into discrete and contextually invariant units such as phonemes and words. Continuous aspects of the signal are thought to represent noise that must be discarded during perception, and so-called invariant cues represent nuggets of discreteness buried in this continuous signal. NIH Public AccessIt is now clear that the variance reduction assumption is ...

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“…It was concluded that people perceived voiced and voiceless stops in a rate-dependent manner [8,9]. Furthermore, in studies on duration effect on the perception of fricatives and affricates [10,11], the duration of fricative noise was found to have a significant effect on perception in Greek and English. However, the classic CP paradigm defined by Liberman et al [1] was not applied in most of the above studies.…”

Section: Introductionmentioning

confidence: 97%

The effect of duration on categorical perception of Mandarin tone and voice onset time

Yan¹,

Peng²

2018

6th International Symposium on Tonal Aspects of Languages (TAL 2018)

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Whether duration influences the categorical perception (CP) of speech is still a controversial issue. Investigations on the effect of duration of stimuli on the CP has led to opposing results. The present study focused on the effect of duration on the CP of Mandarin lexical tones and aspiration of stops, in which the speech rates were normal for speech production and perception. The results showed that there was no significant duration effect on the CP of lexical tones. However, we found that syllable duration significantly changed the voice onset time (VOT) values of boundary position of aspiration of stops, although the discrimination ability of aspiration was not influenced by syllable duration, indicating that people have a robust perceptual competence to systematically encode alterations of speech production.

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Continuous and categorical perception of a fricative-affricate continuum

Cited by 6 publications

References 16 publications

Experimental study of self-oscillations of the trachea–larynx tract by laser doppler vibrometry

Experimental study of self-oscillations of the trachea–larynx tract by laser doppler vibrometry

Gradient sensitivity to within-category variation in words and syllables.

The effect of duration on categorical perception of Mandarin tone and voice onset time

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