Temporal properties of spontaneous speech—a syllable-centric perspective

Greenberg, Steven; Carvey, Hannah; Hitchcock, Leah; Chang, Shuangyu

doi:10.1016/j.wocn.2003.09.005

Cited by 301 publications

(319 citation statements)

References 22 publications

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“…As noted earlier, the amplitude envelope of speech contains a range of modulations at different temporal rates, with the 'modulation spectrum' within the envelope typically showing the highest power between 2-12 Hz (and peaking around 3−5 Hz irrespective of differences in language or speech rate; see Houtgast and Steeneken 1985;Greenberg et al 2003;Greenberg 2006). These observations have been related to the neural encoding of speech by a family of "multi-time resolution models" of speech processing developed in the field of auditory neuroscience (e.g., Poeppel 2003;Hickok and Poeppel 2007;Ghitza and Greenberg 2009;Ghitza 2011).…”

Section: The Brain: Oscillatory Neuronal Entrainment and Speech Encodingmentioning

confidence: 85%

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Speech rhythm and temporal structure: Converging perspectives?

Goswami

Leong

2013

Laboratory Phonology

100

110

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Section: The Brain: Oscillatory Neuronal Entrainment and Speech Encodingmentioning

confidence: 85%

“…drive round, pick my children back up" is shown in Figure 1a. As described by Giraud and Poeppel (2012), rhythmic structure in the envelope is given by regular modulations of signal energy over time, which peak for speech at a rate of 3-5 Hz, the "syllable rate" (Greenberg et al 2003).…”

Section: Discrimination Of Amplitude Modulation and Rise Time In Dyslmentioning

confidence: 99%

Speech rhythm and temporal structure: Converging perspectives?

Goswami

Leong

2013

Laboratory Phonology

100

110

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“…Our choice of AM and FM frequencies was informed by knowledge of the characteristics of natural speech; that is, we chose a theta-band AM frequency in the range of the syllable envelope (20)(21)(22) and a delta-band FM frequency in the range of prosodic contour fluctuations (23). Thus, it might be argued that the observed comodulation of psychophysical performance was specific to our choice of a slow FM and a faster AM.…”

Section: Entrained Neural Phase In Multiple Frequency Bands Comodulatesmentioning

confidence: 99%

“…In particular, we chose an amplitude modulation (AM) rate in the range of the speech syllable envelope (5.075 Hz, refs. [20][21][22] and a slower frequency modulation (FM) rate in the range of prosodic fluctuations (3.1 Hz, ref. 23; Fig.…”

mentioning

confidence: 99%

Entrained neural oscillations in multiple frequency bands comodulate behavior

Henry

Obleser

2014

Proc. Natl. Acad. Sci. U.S.A.

207

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Our sensory environment is teeming with complex rhythmic structure, to which neural oscillations can become synchronized. Neural synchronization to environmental rhythms (entrainment) is hypothesized to shape human perception, as rhythmic structure acts to temporally organize cortical excitability. In the current human electroencephalography study, we investigated how behavior is influenced by neural oscillatory dynamics when the rhythmic fluctuations in the sensory environment take on a naturalistic degree of complexity. Listeners detected near-threshold gaps in auditory stimuli that were simultaneously modulated in frequency (frequency modulation, 3.1 Hz) and amplitude (amplitude modulation, 5.075 Hz); modulation rates and types were chosen to mimic the complex rhythmic structure of natural speech. Neural oscillations were entrained by both the frequency modulation and amplitude modulation in the stimulation. Critically, listeners' target-detection accuracy depended on the specific phase-phase relationship between entrained neural oscillations in both the 3.1-Hz and 5.075-Hz frequency bands, with the best performance occurring when the respective troughs in both neural oscillations coincided. Neural-phase effects were specific to the frequency bands entrained by the rhythmic stimulation. Moreover, the degree of behavioral comodulation by neural phase in both frequency bands exceeded the degree of behavioral modulation by either frequency band alone. Our results elucidate how fluctuating excitability, within and across multiple entrained frequency bands, shapes the effective neural processing of environmental stimuli. More generally, the frequency-specific nature of behavioral comodulation effects suggests that environmental rhythms act to reduce the complexity of highdimensional neural states.auditory perception | psychophysics | neuroscience L ow-frequency neural oscillations have recently been proposed to play a crucial role in perception (1-4). This is because lowfrequency neural oscillations reflect fluctuations in local neuronal excitability, meaning they influence the likelihood of neuronal firing in a periodic fashion (4-6). The result is that the probability that a (near-threshold) stimulus will elicit a neuronal response is not a uniform function of time but, instead, depends on the phase of the neural oscillation into which the stimulation falls. Indeed, the dependence of behavioral performance on neural oscillatory phase has been demonstrated in the visual (7-11) and auditory (12-15) domains.The role of neural oscillatory phase in perception is suggested to be of particular importance when stimuli possess temporal regularity (1,11,16,17). Precise alignment of neural oscillations with rhythmic stimuli is accomplished via entrainment, which is a process by which two oscillations become synchronized, or phaselocked, through phase and/or period adjustments (18). Through entrainment, perception of rhythmic stimuli is optimized when high-energy portions of a signal are aligned with periods of high excitab...

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“…Phonetic descriptions have traditionally focused on either read text or citation-form (i.e., formal, carefully pronounced) speech. However, the phonetic properties of careful speech often differ from spontaneous speech [3][4][5][6][7]. Because speech technology is becoming increasingly focused on real-world applications, it is important to quantitatively analyze spontaneous material.…”

Section: Introductionmentioning

confidence: 99%