Speech Rate Research Articles

The impact of speech rhythm and rate on comprehension in aphasia

BackgroundSpeech comprehension impairment in post-stroke aphasia is influenced by speech acoustics. This study investigated the impact of speech rhythm (syllabic isochrony) and rate on comprehension in people with aphasia (PWA). Rhythmical speech was hypothesised to support comprehension in PWA by reducing temporal variation, leading to enhanced speech tracking and more appropriate sampling of the speech stream. Speech rate was hypothesised to influence comprehension through auditory and linguistic processing time. MethodsOne group of PWA (n=19) and two groups of control participants (n=10 and n=18) performed a sentence-verification. Sentences were presented in two rhythm conditions (natural vs. isochronous) and two rate conditions (typical, 3.6Hz vs. slow, 2.6Hz) in a 2x2 factorial design. PWA and one group of controls performed the experiment with clear speech. The second group of controls performed the experiment with perceptually degraded speech. ResultsD-prime analyses measured capacity to detect incongruent endings. Linear mixed effects models investigated the impact of group, rhythm, rate and clarity on d-prime scores. Control participants were negatively affected by isochronous rhythm in comparison to natural rhythm, likely due to alteration in linguistic cues. This negative impact remained or was exacerbated in control participants presented with degraded speech. In comparison, PWA were less affected by isochronous rhythm, despite producing d-prime scores matched to the degraded speech control group. Speech rate affected all groups, but only in interactions with rhythm, indicating that slow-rate isochronous speech was more comprehendible than typical-rate isochronous speech. ConclusionsThe comprehension network in PWA interacts differently with speech rhythm. Rhythmical speech may support acoustic speech tracking by enhancing predictability and ameliorate the detrimental impact of atypical rhythm on linguistic cues. Alternatively, reduced temporal prediction in aphasia may limit the impact of deviation from natural temporal structure. Reduction of speech rate below the typical range may not benefit comprehension in PWA.

Unveiling early signs of Parkinson’s disease via a longitudinal analysis of celebrity speech recordings

Numerous studies proposed methods to detect Parkinson’s disease (PD) via speech analysis. However, existing corpora often lack prodromal recordings, have small sample sizes, and lack longitudinal data. Speech samples from celebrities who publicly disclosed their PD diagnosis provide longitudinal data, allowing the creation of a new corpus, ParkCeleb. We collected videos from 40 subjects with PD and 40 controls and analyzed evolving speech features from 10 years before to 20 years after diagnosis. Our longitudinal analysis, focused on 15 subjects with PD and 15 controls, revealed features like pitch variability, pause duration, speech rate, and syllable duration, indicating PD progression. Early dysarthria patterns were detectable in the prodromal phase, with the best classifiers achieving AUCs of 0.72 and 0.75 for data collected ten and five years before diagnosis, respectively, and 0.93 post-diagnosis. This study highlights the potential for early detection methods, aiding treatment response identification and screening in clinical trials.

Speech profile in different clinical PSP phenotypes: an acoustic-perceptual study.

Progressive supranuclear palsy (PSP) is a neurodegenerative disease with pathological hallmarks and different clinical presentations. Recently, the Movement Disorder Society (MDS) promoted a new classification; specific combinations of the core clinical features identify different phenotypes, including PSP with Richardson's syndrome (PSP-RS) and PSP with predominant parkinsonism (PSP-P). Since speech disorders are very common in PSP, they were included in the MDS-PSP criteria as a supportive clinical feature in the form of hypokinetic, spastic dysarthria. However, little is known about how dysarthria presents across the different PSP variants. The aim of the present study is to evaluate the presence of differences in speech profile in a cohort of PSP-RS and PSP-P patients diagnosed according to the MDS-PSP criteria. Each patient underwent a neurological evaluation and perceptual and acoustic analysis of speech. Disease severity was rated using the Natural History and Neuroprotection in Parkinson plus syndromes-Parkinson plus scale (NNIPPS-PPS), including global score and sub-scores. Twenty-five patients (mean disease duration [standard deviation] = 3.32 [1.79]) were classified as PSP-RS, while sixteen as PSP-P (mean disease duration [standard deviation] = 3.47 [2.00]). These subgroups had homogeneous demographical and clinical characteristics, including disease severity quantified by the NNIPPS-PPS total score. Only the NNIPPS-PPS oculomotor function sub-score significantly differed, being more impaired in PSP-RS patients. No significant differences were found in all speech variables between the two groups. Speech evaluation is not a distinguishing feature of PSP subtypes in mid-stage disease.

Segmentation window of speech information processing in the human auditory cortex

Humans perceive continuous speech signals as discrete sequences. To clarify the temporal segmentation window of speech information processing in the human auditory cortex, the relationship between speech perception and cortical responses was investigated using auditory evoked magnetic fields (AEFs). AEFs were measured while participants heard synthetic Japanese words /atataka/. There were eight types of /atataka/ with different speech rates. The durations of the words ranged from 75 to 600 ms. The results revealed a clear correlation between the AEFs and syllables. Specifically, when the durations of the words were between 375 and 600 ms, the evoked responses exhibited four clear responses from the superior temporal area, M100, that corresponded not only to the onset of speech but also to each group of consonant/vowel syllable units. The number of evoked M100 responses was correlated to the duration of the stimulus as well as the number of perceived syllables. The approximate range of the temporal segmentation window limit of speech perception was considered to be between 75 and 94 ms. This finding may contribute to optimizing the temporal performance of high-speed synthesized speech generation systems.

Arabic consonant length perception depends on the relative speech rate of the distal context.

Listeners adapt to the speech rate of talkers. Many studies of speech rate adaptation have focused on the influence of rate information on the perception of word segmentation or segmental perception in English. The effects of immediately adjacent (i.e., proximal) information are generally strong on the perception of both segments and segmentation, but the effects of rate information temporally remote from (i.e., distal to) ambiguous speech signals are less clear, especially for segments. The present study examines the influence of distal rate adaptation on the perception of geminate consonants in Arabic that straddle a morpheme boundary (i.e., heteromorphemic geminates). Participants heard sentences that at one point were ambiguous to the presence of the Arabic definite clitic al, which, under certain circumstances, can be realized as gemination of the subsequent word-initial consonant. The sentences were either recorded with or without the clitic and with three possible distal speech rates in the context of the clitic. They transcribed the sentences and reported what they heard, and those transcriptions were analyzed for the contribution of the original recording and the distal speech rate on the perception of al. It was found that the perception of geminates in Arabic is rate dependent. This extends the knowledge of the effects of distal rate cues to Arabic, showing that Arabic geminate consonants are perceived relative to the rate of the distal context.

Developing Second Language Mandarin Fluency Through Pedagogic Intervention and Study Abroad: Planning Time, Speech Rate, and Response Duration

AbstractThis longitudinal study examines the effects of a pre‐study abroad (SA) pedagogic intervention and subsequent SA experience on second language (L2) Mandarin fluency. It explores two temporal aspects of oral fluency—planning time and speech rate—along with one performance measure, duration of response. Additionally, L2 contact data were included as a supplementary variable in the analysis. The experimental group was assessed at three points: before instruction (T1), after 2 weeks of instruction (T2), and post‐SA (T3). A non‐instructed control group that participated in the SA period provided baseline data. Both groups demonstrated improved fluency after the SA period, with the experimental group showing superior performance in planning time, speech rate, and duration of response. The greatest reduction in between‐group differences occurred at T2 and persisted over time. These findings highlight that combining targeted instruction with exposure is highly effective, with L2 contact strongly correlating with overall fluency gains.

Clinical usefulness of the Verbal Fluency Index (VFI) in amyotrophic lateral sclerosis.

This study aimed at assessing the clinical utility of the Verbal Fluency Index (VFI) over a classical phonemic verbal fluency test in Italian-speaking amyotrophic lateral sclerosis (ALS) patients. N = 343 non-demented ALS patients and N = 226 healthy controls (HCs) were administered the Verbal fluency - S task from the Edinburgh Cognitive and Behavioural ALS Screen (ECAS). The associations between the number of words produced (NoW), the time to read words aloud (TRW) and the VFI (computed as [(60"-TRW)/NoW]) on one hand and both bulbar/respiratory scores from the ALS Functional Rating Scale - Revised (ALSFRS-R) and the ECAS-Executive on the other were tested. Italian norms for the NoW and the VFI were derived in HCs via the Equivalent Score method. Patients were classified based on their impaired/unimpaired performances on the NoW and the VFI (NoW-VFI-; NoW-VFI+; NoW + VFI-; NoW + VFI+), with these groups being compared on ECAS-Executive scores. The VFI, but neither the NoW nor the TRW, were related to ALSFRS-Bulbar/-Respiratory scores; VFI and NoW measures, but not the TRW, were related to the ECAS-Executive (p < .001). The NoW slightly overestimated the number of executively impaired patients when compared to the VFI (31.1% vs. 26.8%, respectively). Patients with a defective VFI score - regardless of whether they presented or not with a below-cutoff NoW - reported worse ECAS-Executive scores than NoW + VFI + ones. The present reports support the use of the Italian VFI as a mean to validly assess ALS patients' executive status by limiting the effect of motor disabilities that might undermine their speech rate.

The Analysis of English Teacher Talk Modification in Classroom Interaction of 2nd Grade Students at MTsN 6 Kubang Putiah

This research was due to some problems that were found in MTsN 6 Kubang Putih. First, teacher gave less pauses during her talk in the classroom. Teacher talk should be give more pauses for students’ comprehension. Second, the teacher did not do self-repeat frequently. She only does it sometimes. Self-repeat in teacher talk also need to be done frequently. Self-repeat is when the teacher repeat her sentence or word for the students to get a better understanding. This research was descriptive qualitative. , the subject of the research is the teacher and students of English class of the second grade in MTsN 6 Kubang Putih in academic year 2021. There is six class and one class consist of 30 students. The researcher focused on teacher’s talk in the classroom interaction in English class. The researcher used purposive sampling to choose the student to be interviewed or participant. The data of the present study are collected through observation in the classroom and conducting interview. The researcher found that the modifications seen in teacher talk in language classrooms, including a slower rate of speech, longer and more frequent pauses, exaggerated and simplified pronunciation, more basic vocabulary, less subordination, more declaratives and statements versus questions, and more self-repetition, were all present. This supports the findings from Chaudron and Dodu's study of modification of teacher talk in language classrooms. The findings of this research highlighted the importance of teacher modifications in language teaching. It is essential for teachers to vary their speech rate, use pauses, and stress particular words in order to emphasize the messages they are trying to communicate within the classroom. Self-repeat can aid learners in understanding the instructional content better. Additionally, teachers should incorporate simple vocabulary within their discussions, and use more declarative senteces. Modifying the teacher talk is an effective strategy in helping learners better comprehend the material being presented.

Estimation of Speech Features Using a Wearable Inertial Sensor

Speech features have been investigated as novel digital biomarkers for many psychiatric and neurocognitive diseases. Microphones are the most used devices for speech recording but inevitably suffering from several disadvantages such as privacy leakage and environmental noises, limiting their clinical applications particularly for long-term ambulatory monitoring. The aim of the present study is therefore to explore the feasibility of extracting speech features from the acceleration recorded on the sternum. Ten healthy subjects volunteered in our study. Two speech tasks, i.e., repeating one sentence 20 times and reading 20 different sentences, were performed by each subject, with each task repeated 8 times under different speech rate and loudness. Voice signals and speech-caused chest vibrations were simultaneously recorded by a microphone and an accelerometer placed on the sternum. 42 acoustic features and 6 time-related prosodic features were extracted from both signals using a standard toolbox, and then compared by a linear fit and correlation analysis. Good agreement between the acceleration features and microphone features is observed in all 6 time-related prosodic features for both tasks, but only in 19 and 17 acoustic features for task 1 and 2, respectively, with most of them loudness- or pitch-related. Our results suggest the sternum acceleration to track time-related speech prosody, loudness, and pitch very well, demonstrating the feasibility of deriving digital biomarkers from the acceleration signal for diseases strongly related to time-related prosodic and loudness features.

Speech Outcome Audit for Cleft Lip and Palate Patient Population Correlated With Veau Cleft Type, Surgical Repair Technique, and Patient Age

Objective: The objective of this study is to determine speech outcome differences for specific palate repair techniques and correlate these data with patient age at the time of operation. Methods: A retrospective study was conducted on a cohort of consecutive nonsyndromic patients who underwent cleft lip and/or palate repair at the authors' hospital between 2010 and 2020. Only those patients who participated in at least 4 years of follow-up accompanied by audio-video recording were included. The patient cohort was divided into 2 age groups, between 1 year and 2 years of age versus older than 2 years of age. Standardized perceptual speech evaluations and nasopharyngoscopy were performed by the authors' team to detect the presence of velopharyngeal insufficiency. Results: A total of 481 patients were initially evaluated, and 323 of these patients met all inclusion criteria and were subsequently selected for this study. One hundred seventy-two patients (n = 172) underwent palatal surgery using the Bardach 2-flap palatoplasty technique, 47 patients (n = 47) underwent repair through the von Langenbeck palatoplasty technique, 78 patients (n = 78) underwent repair through Veau-Wardill-Killner palatoplasty technique, and 26 patients (n = 26) underwent repair through double-opposing Z-plasty palatoplasty. The rate of residual velopharyngeal insufficiency was statistically similar among all palatoplasty techniques. A comparison between these two age groups revealed that patients younger than 2 years of age showed higher speech outcome success. Conclusion: High rates of speech success are achieved for patients younger than 2 years of age. Speech outcomes success is maximized by proper technique selection in relation to cleft type.

Dog-human vocal interactions match dogs' sensory-motor tuning.

Within species, vocal and auditory systems presumably coevolved to converge on a critical temporal acoustic structure that can be best produced and perceived. While dogs cannot produce articulated sounds, they respond to speech, raising the question as to whether this heterospecific receptive ability could be shaped by exposure to speech or remains bounded by their own sensorimotor capacity. Using acoustic analyses of dog vocalisations, we show that their main production rhythm is slower than the dominant (syllabic) speech rate, and that human-dog-directed speech falls halfway in between. Comparative exploration of neural (electroencephalography) and behavioural responses to speech reveals that comprehension in dogs relies on a slower speech rhythm tracking (delta) than humans' (theta), even though dogs are equally sensitive to speech content and prosody. Thus, the dog audio-motor tuning differs from humans', and we hypothesise that humans may adjust their speech rate to this shared temporal channel as means to improve communication efficacy.

Development and Application of TOPIK Speech Evaluation Feedback Model Based on ChatGPT

Development and Application of TOPIK Speech Evaluation Feedback Model Based on ChatGPT

Linguistic Features of Different Proficiency Learners’ Oral Performance in a Project-Based Learning Context

Project-Based Learning (PBL) can potentially enhance learners’ oral proficiency. However, little evidence supports how PBL improves learners’ complexity, accuracy, and fluency, particularly for learners with different proficiency levels. This study examined the changes and linguistic features of varying proficiency learners’ complexity, accuracy, and fluency within a PBL context. It involved a homogeneous group of 45 Chinese college learners, categorized into high (N=15), medium (N=15), and low proficiency learners (N=15). Their oral complexity, accuracy, and fluency were assessed using speaking tests before and after PBL. The changes in their oral performance were evaluated using objective measures of complexity, accuracy, and fluency. The transcripts were also used to analyze the linguistic features of different proficiency learners. The results indicate that PBL significantly enhances syntactic complexity as learners’ proficiency levels increase. Significant differences were observed in lexical complexity, pronunciation accuracy, and self-repairs between high and low-proficiency learners. However, no significant differences were found in syntactic accuracy and speech rate across high, medium, and low proficiency learners. The findings also indicate that different proficiency learners reveal various linguistic features of syntactic complexity, syntactic accuracy, and self-repairs in their oral performance. This study provides implications for educators to design project-based activities for different proficiency learners to improve their complexity, accuracy, and fluency.

Directional Sound Field and Spatial Speech Decay: Impact of Sound Absorption and Screen Height in Performance Spaces and Open-Plan Offices

This study investigates the spatial decay rate of speech in performance spaces and open-plan offices, focusing on the effects of sound absorption and screen height. Utilising parameters such as D2, SD_2, SD2, S (decay rate) and Lp, A, S, 4mL_p, A, S, 4mLp, A, S, 4m (sound pressure level at 4 meters), the research evaluates how acoustic environments impact speech transmission. Through detailed experiments on different screen heights (1.2 m, 2.1 m, and 2.9 m) and material absorption, it was found that increasing screen height significantly reduces the spatial speech decay in open-plan offices, but only up to a certain threshold. The results suggest that while acoustic enhancements like screens and absorptive materials improve speech privacy, over-reliance on single- number ratings can lead to misclassification of office acoustics. This research provides insights for optimising room acoustics, ensuring speech privacy, and meeting acoustic comfort standards.

Exploring EFL learners’ perceived promise and limitations of using an artificial intelligence speech evaluation system for speaking practice

This study explores English as a Foreign Language (EFL) learners' perceptions of the promise and limitations of EAP Talk, an AI-based speech evaluation system, for speaking practice. Using a mixed-methods approach, data were collected from 366 EFL learners across five universities through questionnaires and semi-structured interviews. The findings reveal that EAP Talk significantly enhances speaking skills, including pronunciation, grammar accuracy, idea-organization, read-aloud, and presentation skills. Participants appreciated the convenience, motivational aspects, and institutional efficiency of EAP Talk, which allowed for flexible and autonomous learning. However, several limitations were identified. Issues with the accuracy of voice recognition and score feedback affected learners' confidence in the feedback. The relevance of practice materials to academic courses was another concern, as was the limited detail in the feedback provided by EAP Talk, which often lacked comprehensive explanations and corrective guidance. The absence of feedback on grammar accuracy and speech organization further limited the tool's effectiveness for developing comprehensive speaking proficiency. These findings suggest that while EAP Talk holds significant potential for enhancing language learning, ongoing improvements are necessary to address its limitations. This study contributes to the understanding of how AI tools can support EFL learners for speaking practice.

Phoneme Recognition in Korean Singing Voices Using Self-Supervised English Speech Representations

In general, it is difficult to obtain a huge, labeled dataset for deep learning-based phoneme recognition in singing voices. Studying singing voices also offers inherent challenges, compared to speech, because of the distinct variations in pitch, duration, and intensity. This paper proposes a detouring method to overcome this insufficient dataset, and applies it to the recognition of Korean phonemes in singing voices. The method started with pre-training the HuBERT, a self-supervised speech representation model, on a large-scale English corpus. The model was then adapted to the Korean speech domain with a relatively small-scale Korean corpus, in which the Korean phonemes were interpreted as similar English ones. Finally, the speech-adapted model was again trained with a tiny-scale Korean singing voice corpus for speech–singing adaptation. In the final adaptation, melodic supervision was chosen, which utilizes pitch information to improve the performance. For evaluation, the performance on multi-level error rates based on Word Error Rate (WER) was taken. Using the HuBERT-based transfer learning for adaptation improved the phoneme-level error rate of Korean speech by as much as 31.19%. Again, on singing voices by melodic supervision, it improved the rate by 0.55%. The significant improvement in speech recognition underscores the considerable potential of a model equipped with general human voice representations captured from the English corpus that can improve phoneme recognition on less target speech data. Moreover, the musical variation in singing voices is beneficial for phoneme recognition in singing voices. The proposed method could be applied to the phoneme recognition of other languages that have less speech and singing voice corpora.

Is there a cost when predictions are not met? A VWP study investigating L1 and L2 speakers.

Research has found that both first language (L1) and second language (L2) speakers make predictions about upcoming linguistic information, with predictive behaviour being impacted by individual differences and methodological factors. However, it is not clear whether a cost is incurred when a prediction is made, but not met. L2 speakers have less experience with their L2 and parsing can be cognitively demanding, which together may lead L2 speakers to incur prediction costs differently relative to L1 speakers. In this study using the visual world paradigm, we test whether L1 and L2 speakers predict in the same way, within the same time frame, and incur the same costs if predictions are not met. We also explore the role of proficiency and speech rate. We found that both groups predict in a similar way and within a similar time frame. In addition, neither group incurred a prediction cost when the target was the most likely alternative, though L2 speakers take longer to shift their attention to the target object when predictions are not met. We argue that this reflects a slowing of lexical access rather than a specific cost of prediction. We only found prediction differences when speech rate was included in the analysis, highlighting the importance of attending to speech rate in studies using the visual world paradigm. Overall, this study supports research showing that both L1 and L2 speakers may make multiple partial predictions about upcoming information rather than predicting one specific lexical candidate while inhibiting less likely lexical candidates.

Demystifying Velopharyngeal Dysfunction for Plastic Surgery Trainees Part 3: Objective Assessment and Surgical Decision-Making.

Velopharyngeal dysfunction (VPD) is the inability to achieve proper closure of the velopharyngeal (VP) port, affecting speech and swallowing. After an auditory-perceptual speech evaluation by a speech-language pathologist, objective assessment of the VP port is required to determine the need for surgical intervention. This 3-part series provides a comprehensive discussion on (1) the anatomy and physiology of the velopharyngeal mechanism; (2) fundamental speech terminology and principles of perceptual speech assessment for VPD; and (3) techniques for objective evaluation of the VP port and surgical decision-making process. In part 3, the authors focus on the modalities for objective VP port assessment, including both direct and indirect methods. Direct imaging techniques such as videofluoroscopy, nasoendoscopy, and MRI are detailed for their strengths and limitations in visualizing VP port function and preoperative planning. Indirect assessments, including nasometry and aerodynamic measurements, are also briefly discussed. The decision-making process for surgical intervention is explored, emphasizing factors such as the severity and etiology of VPD, VP closure patterns, palatal length, orientation of the levator veli palatini, and other patient-specific considerations. The authors review the surgical options for repair including palatoplasty procedures (Furlow palatoplasty, straight-line intravelar veloplasty, and palatal lengthening buccal myomucosal flaps) and pharyngoplasty procedures (posterior pharyngeal flaps and sphincter pharyngoplasty), highlighting their indications, techniques, and potential complications. This series serves as an accessible resource, providing the foundational knowledge required for surgical trainees new to this topic.

Demystifying Velopharyngeal Dysfunction for Plastic Surgery Trainees Part 2: Speech Fundamentals and Perceptual Speech Assessment.

Velopharyngeal dysfunction (VPD) is the inability to achieve proper closure of the velopharyngeal (VP) port, affecting speech and swallowing. The gold standard for diagnosis is auditory-perceptual speech evaluation by a specialized speech-language pathologist. This 3-part series provides a comprehensive discussion on (1) the anatomy and physiology of the velopharyngeal mechanism, (2) fundamental speech terminology and principles of perceptual speech assessment for VPD, and (3) techniques for objective evaluation of the VP port and surgical decision-making process. In part 2, the authros begin with the concepts and terminology required to understand the perceptual speech assessment of VPD, including resonance, articulation, and the differentiation between consonants and vowels. We review the types of speech samples used for evaluation such as single-word articulation tests, syllable repetition, sentence repetition, and spontaneous connected speech. Finally, we discuss the auditory-perceptual speech assessment for VPD, including the assessment of resonance, nasal air emission, articulation, and voice quality. The use of rating scales like the Pittsburgh Weighted Speech Scale (PWSS) and the Cleft Audit Protocol for Speech-Augmented-Americleft Modification (CAPS-A-AM) is highlighted. In addition, the significance of intraoral examinations, visual-tactile-auditory evaluations, and the assessment of voice quality are covered. Most textbook chapters discussing this topic assume a foundational knowledge of speech-language pathology, which a surgical trainee may lack. This study aimed to bridge the gap between surgical training and speech pathology, providing a comprehensive resource to enhance the understanding and management of VPD.

Speech Rate of Children With Developmental Language Disorder in a Narrative Context

This study investigates the speech rate of Cypriot Greek-speaking children with developmental language disorder (DLD) as well as the effect of age and gender. The participants were 16 children with DLD aged 4 years 11 months to 8 years 1 month and 22 children with typical language development (TLD) aged 4 years 5 months to 8 years 7 months. Both groups were divided into younger and older groups. All children participated in a storytelling task, and measurements were conducted based on syllables and words per second. The results indicated significant differences between children with DLD and children with TLD in the speech rate, but no differences between younger and older and male and female children of both groups. The stagnancy of speech rate across different age groups demonstrates that children with DLD follow similar developmental trajectories as children with TLD and that speech rate is not affected by gender. Speech rate could be considered as a marker for identifying DLD in Cypriot Greek-speaking children.