Luis M T Jesus
Biographic Data
| ID | 125104 |
|---|---|
| NAME | Luis M T Jesus |
| GIVEN NAMES | Luis M T |
| FAMILY NAME | Jesus |
| SIGNATURE | JESUS L M T |
| AFFILIATIONS | University of Aveiro |
| ORCID | 0000-0002-8534-3218 |
| VERIFIED | Yes |
| TOTAL WORKS | 14 |
| TOTAL CITATIONS | 67 |
| AUTHOR COUNT | 14 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 2002 |
| LATEST PUBLICATION YEAR | 2024 |
| H-INDEX | 5 |
Influence of the European Portuguese phonological system on the perception of close-mid and open-mid vowels
This study’s purpose was to analyse the influence of neutralisation on the perception of European Portuguese (EP) close-mid and open-mid vowels, and the gradient between the /i/, /e/, /ε/ and /a/ phonological categories. A fuzzy boundary between mid-vowels has been described in the phonological systems of various languages including EP, a variety of Portuguese with complex phonological phenomena and exceptional realisations of vowels in different…
Discriminative segmental cues to vowel height and consonantal place and voicing in whispered speech
The acoustic signal attributes of whispered speech potentially carry sufficiently distinct information to define vowel spaces and to disambiguate consonant place and voicing, but what these attributes are and the underlying production mechanisms are not fully known. The purpose of this study was to define segmental cues to place and voicing of vowels and sibilant fricatives and to develop an articulatory interpretation of acoustic data. Seventeen…
O Processamento do sujeito nulo na doença de Alzheimer
Com este estudo pretendemos conhecer melhor o impacto da Doença de Alzheimer (DA) na linguagem, mais concretamente o impacto no contexto da utilização do sujeito nulo. Analisamos as produções de doze pessoas com DA e de um grupo de controlo com a mesma dimensão, em tarefas de leitura de três tipos de frases: Simples com verbo em tempo simples; simples com verbo conjugado num tempo composto; complexas formadas por duas orações. As frases, traduzid…
Oral and Laryngeal Articulation Control of Voicing in Children with and without Speech Sound Disorders
Voicing contrast is hard to master during speech motor development, and the phonological process of consonant devoicing is very frequent in children with Speech Sound Disorders (SSD). Therefore, the aim of this study was to characterise the oral and laryngeal articulation control strategies used by children with and without SSD as a function of place of articulation. The articulation rate and relative oral airflow amplitude ( flow ) were used to …
Segmental cues to intonation of statements and polar questions in whispered, semi-whispered and normal speech modes
Stop and Fricative Devoicing in European Portuguese, Italian and German
This paper describes a cross-linguistic production study of devoicing for European Portuguese (EP), Italian, and German. We recorded all stops and fricatives in four vowel contexts and two word positions. We computed the devoicing of the time-varying patterns throughout the stop and fricative duration. Our results show that regarding devoicing behaviour, EP is more similar to German than Italian. While Italian shows almost no devoicing of all pho…
Is the Portuguese version of the passage 'The North Wind and the Sun' phonetically balanced
There is no standard phonetically balanced short passage for Portuguese research and clinical practice. This paper presents results of a novel analysis of 'The North Wind and the Sun' (NWS) passage that aims to determine if it is phonetically balanced for European Portuguese (EP) and Brazilian Portuguese (BP), based on new transcriptions resulting from algorithms developed for grapheme-phone transcription in these two varieties of Portuguese. The…
Quality of Life Predictors and Normative Data
Estimation of stops' spectral place cues using multitaper techniques
This study focuses on the spectral characteristics of the European Portuguese stops /p, b, t, d, k, g/ produced by six native speakers. We analysed the spectral peaks and troughs by means of multitaper spectra and performed a parameterisation of the stop spectra using slope and moment measures. In comparison to traditional spectral estimations, multitaper is more exact and, more importantly, not limited to a stationary signal length necessary for…
Weak voicing in fricative production
(Non-)retroflex Slavic affricates and their motivation: Evidence from Czech and Polish
The Slavic affricate represented by /č/ is tacitly or explicitly assumed to be // for all Slavic languages. In this paper we revise the affricate inventories of Polish and Czech, showing that the symbol /č/ stands for two different sounds: the palatoalveolar // in Czech and the retroflex // in Polish. This conclusion is supported by acoustic results for Polish and Czech data. The fact that COG (centre of gravity) values of frication are not signi…
Temporal acoustic correlates of the voicing contrast in European Portuguese stops
This study focuses on the temporal analysis of stops /p b t d k ɡ/ and devoicing analysis of voiced stops /b d ɡ/ produced in different word positions by six native speakers of European Portuguese. The study explores acoustic properties related to voicing. The following acoustic properties were measured: voice onset time (VOT), stop duration, closure duration, release duration, voicing into closure duration, duration of the preceding vowel and du…
Acoustic analysis of European Portuguese uvular [χ, ] and voiceless tapped alveolar [] fricatives
In a study of European Portuguese fricatives it was noted that / R , / were often realized as [χ, ], which are, respectively, unvoiced and voiced uvular fricative, and voiceless tapped alveolar fricative. Although these phones have not previously been recognized as occurring in European Portuguese, they occurred in 115 words out of a corpus of 1304 words, out of which 107 words could be analysed, in recordings made by four native speakers (two me…
A parametric study of the spectral characteristics of European Portuguese fricatives
A parametric study of the spectral characteristics of European Portuguese fricatives
(Non-)retroflex Slavic affricates and their motivation: Evidence from Czech and Polish
The Slavic affricate represented by /č/ is tacitly or explicitly assumed to be // for all Slavic languages. In this paper we revise the affricate inventories of Polish and Czech, showing that the symbol /č/ stands for two different sounds: the palatoalveolar // in Czech and the retroflex // in Polish. This conclusion is supported by acoustic results for Polish and Czech data. The fact that COG (centre of gravity) values of frication are not signi…
Stop and Fricative Devoicing in European Portuguese, Italian and German
This paper describes a cross-linguistic production study of devoicing for European Portuguese (EP), Italian, and German. We recorded all stops and fricatives in four vowel contexts and two word positions. We computed the devoicing of the time-varying patterns throughout the stop and fricative duration. Our results show that regarding devoicing behaviour, EP is more similar to German than Italian. While Italian shows almost no devoicing of all pho…
Temporal acoustic correlates of the voicing contrast in European Portuguese stops
This study focuses on the temporal analysis of stops /p b t d k ɡ/ and devoicing analysis of voiced stops /b d ɡ/ produced in different word positions by six native speakers of European Portuguese. The study explores acoustic properties related to voicing. The following acoustic properties were measured: voice onset time (VOT), stop duration, closure duration, release duration, voicing into closure duration, duration of the preceding vowel and du…
Segmental cues to intonation of statements and polar questions in whispered, semi-whispered and normal speech modes
Quality of Life Predictors and Normative Data
Estimation of stops' spectral place cues using multitaper techniques
This study focuses on the spectral characteristics of the European Portuguese stops /p, b, t, d, k, g/ produced by six native speakers. We analysed the spectral peaks and troughs by means of multitaper spectra and performed a parameterisation of the stop spectra using slope and moment measures. In comparison to traditional spectral estimations, multitaper is more exact and, more importantly, not limited to a stationary signal length necessary for…
Is the Portuguese version of the passage 'The North Wind and the Sun' phonetically balanced
There is no standard phonetically balanced short passage for Portuguese research and clinical practice. This paper presents results of a novel analysis of 'The North Wind and the Sun' (NWS) passage that aims to determine if it is phonetically balanced for European Portuguese (EP) and Brazilian Portuguese (BP), based on new transcriptions resulting from algorithms developed for grapheme-phone transcription in these two varieties of Portuguese. The…
Weak voicing in fricative production
Acoustic analysis of European Portuguese uvular [χ, ] and voiceless tapped alveolar [] fricatives
In a study of European Portuguese fricatives it was noted that / R , / were often realized as [χ, ], which are, respectively, unvoiced and voiced uvular fricative, and voiceless tapped alveolar fricative. Although these phones have not previously been recognized as occurring in European Portuguese, they occurred in 115 words out of a corpus of 1304 words, out of which 107 words could be analysed, in recordings made by four native speakers (two me…
Discriminative segmental cues to vowel height and consonantal place and voicing in whispered speech
The acoustic signal attributes of whispered speech potentially carry sufficiently distinct information to define vowel spaces and to disambiguate consonant place and voicing, but what these attributes are and the underlying production mechanisms are not fully known. The purpose of this study was to define segmental cues to place and voicing of vowels and sibilant fricatives and to develop an articulatory interpretation of acoustic data. Seventeen…
A parametric study of the spectral characteristics of European Portuguese fricatives
Acoustic analysis of European Portuguese uvular [χ, ] and voiceless tapped alveolar [] fricatives
In a study of European Portuguese fricatives it was noted that / R , / were often realized as [χ, ], which are, respectively, unvoiced and voiced uvular fricative, and voiceless tapped alveolar fricative. Although these phones have not previously been recognized as occurring in European Portuguese, they occurred in 115 words out of a corpus of 1304 words, out of which 107 words could be analysed, in recordings made by four native speakers (two me…
Temporal acoustic correlates of the voicing contrast in European Portuguese stops
This study focuses on the temporal analysis of stops /p b t d k ɡ/ and devoicing analysis of voiced stops /b d ɡ/ produced in different word positions by six native speakers of European Portuguese. The study explores acoustic properties related to voicing. The following acoustic properties were measured: voice onset time (VOT), stop duration, closure duration, release duration, voicing into closure duration, duration of the preceding vowel and du…
Estimation of stops' spectral place cues using multitaper techniques
This study focuses on the spectral characteristics of the European Portuguese stops /p, b, t, d, k, g/ produced by six native speakers. We analysed the spectral peaks and troughs by means of multitaper spectra and performed a parameterisation of the stop spectra using slope and moment measures. In comparison to traditional spectral estimations, multitaper is more exact and, more importantly, not limited to a stationary signal length necessary for…
Weak voicing in fricative production
(Non-)retroflex Slavic affricates and their motivation: Evidence from Czech and Polish
The Slavic affricate represented by /č/ is tacitly or explicitly assumed to be // for all Slavic languages. In this paper we revise the affricate inventories of Polish and Czech, showing that the symbol /č/ stands for two different sounds: the palatoalveolar // in Czech and the retroflex // in Polish. This conclusion is supported by acoustic results for Polish and Czech data. The fact that COG (centre of gravity) values of frication are not signi…
Quality of Life Predictors and Normative Data
Stop and Fricative Devoicing in European Portuguese, Italian and German
This paper describes a cross-linguistic production study of devoicing for European Portuguese (EP), Italian, and German. We recorded all stops and fricatives in four vowel contexts and two word positions. We computed the devoicing of the time-varying patterns throughout the stop and fricative duration. Our results show that regarding devoicing behaviour, EP is more similar to German than Italian. While Italian shows almost no devoicing of all pho…
Is the Portuguese version of the passage 'The North Wind and the Sun' phonetically balanced
There is no standard phonetically balanced short passage for Portuguese research and clinical practice. This paper presents results of a novel analysis of 'The North Wind and the Sun' (NWS) passage that aims to determine if it is phonetically balanced for European Portuguese (EP) and Brazilian Portuguese (BP), based on new transcriptions resulting from algorithms developed for grapheme-phone transcription in these two varieties of Portuguese. The…
Segmental cues to intonation of statements and polar questions in whispered, semi-whispered and normal speech modes
Oral and Laryngeal Articulation Control of Voicing in Children with and without Speech Sound Disorders
Voicing contrast is hard to master during speech motor development, and the phonological process of consonant devoicing is very frequent in children with Speech Sound Disorders (SSD). Therefore, the aim of this study was to characterise the oral and laryngeal articulation control strategies used by children with and without SSD as a function of place of articulation. The articulation rate and relative oral airflow amplitude ( flow ) were used to …
Discriminative segmental cues to vowel height and consonantal place and voicing in whispered speech
The acoustic signal attributes of whispered speech potentially carry sufficiently distinct information to define vowel spaces and to disambiguate consonant place and voicing, but what these attributes are and the underlying production mechanisms are not fully known. The purpose of this study was to define segmental cues to place and voicing of vowels and sibilant fricatives and to develop an articulatory interpretation of acoustic data. Seventeen…
O Processamento do sujeito nulo na doença de Alzheimer
Com este estudo pretendemos conhecer melhor o impacto da Doença de Alzheimer (DA) na linguagem, mais concretamente o impacto no contexto da utilização do sujeito nulo. Analisamos as produções de doze pessoas com DA e de um grupo de controlo com a mesma dimensão, em tarefas de leitura de três tipos de frases: Simples com verbo em tempo simples; simples com verbo conjugado num tempo composto; complexas formadas por duas orações. As frases, traduzid…
Influence of the European Portuguese phonological system on the perception of close-mid and open-mid vowels
This study’s purpose was to analyse the influence of neutralisation on the perception of European Portuguese (EP) close-mid and open-mid vowels, and the gradient between the /i/, /e/, /ε/ and /a/ phonological categories. A fuzzy boundary between mid-vowels has been described in the phonological systems of various languages including EP, a variety of Portuguese with complex phonological phenomena and exceptional realisations of vowels in different…
Phonetics and Phonology Research (11 works) · Computer Science (10 works) · Linguistics (9 works) · Speech recognition (9 works) · Physics (8 works) · Portuguese (8 works) · Psychology (8 works) · Speech Recognition and Synthesis (8 works) · Vowel (8 works) · European Portuguese (7 works)