Case study of Brazilian Portuguese laterals using a novel articulatory-acoustic methodology with 3D/4D ultrasound

Charles, Sherman

doi:10.1016/j.specom.2018.08.004

Cited by 13 publications

(23 citation statements)

References 24 publications

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“…Laterals in general are often characterized by high articulatory and acoustic variation (Charles & Lulich, 2018;Ladefoged & Maddieson, 1996;Proctor, 2011), however the effects on perception is not well understood. Therefore, future research should investigate the role and scope of variation in the production and perception of lateral sounds in Korean and other languages.…”

Section: Discussionmentioning

confidence: 99%

“…As the secondary form of articulatory data, a palate impression was made using dental alginate (Ladefoged, 2003). The three-dimensional palate impression was scanned and digitized using a NextEngine Desktop 3D Scanner, and registered with the ultrasound data using the method described by Charles & Lulich (2018).…”

Section: Articulatory and Acoustic Data Collectionmentioning

confidence: 99%

“…The tongue surface was visually identified and manually segmented in every fifth sagittal plane and every tenth coronal plane. This formed a regular grid of tongue surface contours, which were used to interpolate the full three-dimensional tongue surface (similar to the segmentation methods used in Charles & Lulich, 2018;Csapo & Lulich, 2015;Lulich et al, 2016). An example of these methods is shown in Figure 1.…”

Section: Articulatory Data Analysismentioning

confidence: 99%

“…In addition, it is possible to combine a 3D scanned palate impression with 3D ultrasound, providing complementary information about the location of the tongue relative to the palate and teeth. This method can be used to construct a more accurate representation of the tongue shape, and this is especially helpful for articulatory research on lateral sounds since a tongue side gesture and asymmetries in tongue surface that are commonly found can be identified and visualized (Charles & Lulich, 2018).…”

Section: Introductionmentioning

confidence: 99%

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Articulatory characteristics and variation of Korean laterals*

Hwang¹,

Charles²

2019

Phonetics Speech Sci.

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Lateral approximants are well known as having complex articulatory characteristics, which vary cross-linguistically, across speakers, and across utterances. However, less attention has been paid to the articulation of Korean laterals, which do not contrast with a rhotic and may thus exhibit greater-than-normal variability. The focus of this study is to investigate the general articulatory characteristics of the Korean lateral [l] as well as the articulatory variation using novel 3D ultrasound imaging methods. The results of this study revealed significant between-speaker variation and some vowel-dependent variation with regard to the articulation of the Korean lateral [l], which has not been reported previously. Even though all participants in this study showed an anterior occlusion, the place of articulation and the size of the occlusion varied greatly across speakers. The data also revealed that left-right asymmetry is present in the articulation of the Korean lateral. The individual variation of the Korean lateral [l] suggests that it has a large articulatory-acoustic space for variation, since it has no contrasting sound that causes perceptual confusion.

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Section: Discussionmentioning

confidence: 99%

Section: Articulatory and Acoustic Data Collectionmentioning

confidence: 99%

Section: Articulatory Data Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Articulatory characteristics and variation of Korean laterals*

Hwang¹,

Charles²

2019

Phonetics Speech Sci.

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“…Similarly, Bladon's (1979) study on laterals in several European languages yields the highest F2 for palatal laterals, compared to other coronal laterals. Recently, both Wong (2017) and Charles & Lulich (2018 found that the palatal lateral in Brazilian Portuguese can be distinguished from the alveolar lateral by a considerably higher F2 and a slightly lower F1.…”

Section: Lateral Acousticsmentioning

confidence: 99%

Velar lateral allophony in Mee (Ekari)

Staroverov¹,

Tebay²

2021

Journal of the International Phonetic Association

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Velar lateral sounds are rare and their acoustics and contextual effects are understudied. Positional variants of velar laterals are also rarely reported. This paper documents a previously unknown allophony pattern of the velar lateral in Mee (Trans New Guinea; Indonesia), based on an elicitation study with two speakers and a controlled set of recordings from one of the speakers. Our main dataset included carrier phrase recordings of Mee words with the velar lateral, representing the diverse set of contexts where the velar lateral occurs. Our acoustic findings suggest that the Mee velar lateral is realized as a laterally released velar stop [ɡᶫ] before front vowels, and with uvular closure followed by a fricative release [ɢʁ] before back vowels. In line with this description, we found differences in the second formant of the preceding vowel and the periodicity of the release for the two allophones. We explore the implications of our findings for the typology of velar laterals.

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Three-/Four-Dimensional Ultrasound Technology in Speech Research

PearsonJr.

2019

Perspect ASHA SIGs

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Purpose Speech production is a complex 3-dimensional (3D) process, and yet most of what is known about it is derived from 2D midsagittal data. The relatively recent development of safe 3D imaging technologies (including magnetic resonance imaging and ultrasound) provide new opportunities to revisit and reformulate what is already known and to push the boundaries of current knowledge still further. A particularly useful imaging modality for this purpose is 3D/4D ultrasound, which until very recently was not well suited for studies in speech research. This technical report presents an overview of what 3D/4D ultrasound can contribute to speech research, with a focus on 2 demonstrations. Conclusion The 1st demonstration illustrates how 3D/4D ultrasound makes it possible to image certain vocal tract anatomical structures and planes that conventional 2D ultrasound is not capable of imaging. The 2nd demonstration illustrates how 3D/4D ultrasound can be combined with static 3D magnetic resonance imaging to provide new insight into the temporal pervasiveness and spatial extensiveness of lateral contact between the tongue and palate–teeth during speech production.

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Case study of Brazilian Portuguese laterals using a novel articulatory-acoustic methodology with 3D/4D ultrasound

Cited by 13 publications

References 24 publications

Articulatory characteristics and variation of Korean laterals*

Articulatory characteristics and variation of Korean laterals*

Velar lateral allophony in Mee (Ekari)

Three-/Four-Dimensional Ultrasound Technology in Speech Research

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