Search Results (275)

Objective: This study aims to critically review and synthesize the existing literature on the use of voice analysis in assessing nasal obstruction, with a particular focus on acoustic parameters. Data sources: PubMed, Scopus, Web of Science, Ovid Medline, and Science Direct. Review methods: A comprehensive literature search was conducted without any restrictions on publication year, employing Boolean search techniques. The selection and review process of the studies followed PRISMA guidelines. The inclusion criteria comprised studies with participants aged 18 years and older who had nasal obstruction evaluated using acoustic voice analysis parameters, along with objective and/or subjective methods for assessing nasal obstruction. Results: Of the 174 abstracts identified, 118 were screened after the removal of duplicates. The full texts of 37 articles were reviewed. Only 10 studies met inclusion criteria. The majority of these studies found no significant correlations between voice parameters and nasal obstruction. Among the various acoustic parameters examined, shimmer was the most consistently affected, with statistically significant changes identified in three independent studies. A smaller number of studies reported notable findings for fundamental frequency (F0) and noise-related measures such as NHR/HNR. Conclusion: This systematic review critically evaluates existing studies on the use of voice analysis for assessing and monitoring nasal obstruction and hyponasality. The current evidence remains limited, as most investigations predominantly focus on glottic sound and dysphonia, with insufficient attention to the influence of the vocal tract, particularly the nasal cavities, on voice production. A notable gap exists in the integration of advanced analytical approaches, such as machine learning, in this field. Future research should focus on the use of advanced analytical approaches to specifically extrapolate the contribution of nasal resonance to voice thus defining the specific parameters in the voice spectrogram that can give precise information on nasal obstruction. Full article

Higher education has long been subject to feminist critique, contesting traditional practices, with calls for transformative pedagogies that empower marginalised students, address social injustices and promote gender equality. Despite this, most classrooms in Western European universities remain largely unchanged, with educators facing the difficulty of imagining and/or enacting decolonial futures within their curricula. However, some progress has been made, particularly the inclusion of transnational scholarship in syllabi and a turn to transformative pedagogies, which allow for alternative ways of interdisciplinary knowing to enter academia. In this paper, we examine this coming together of approaches which promote dialogue and personal reflection to restructure discussions on equality, gender and knowledge production in the ‘classroom’. Using a creative critical account of feminist ethnography conducted at a Western European university, we present and discuss two illustrative vignettes about cultural mapping and critical fabulation, considering how dissonant voices have challenged Western concepts, exemplifying transformative pedagogy working in tandem with transnational thought. Key insights from the study identify approaches for facilitation of more open and richer discussions to reshape staff and student perspectives of gender, equality and knowledge production. Full article

In the past hundred years, three pontiffs have written apostolic letters to commemorate anniversaries relating to Dante: in 1921, Benedict XV marked the sixth centenary of the death of the great poet; in 1965, Paul VI judged it opportune to write on the occasion of the seventh centenary of his birth; and in 2021, Pope Francis added his voice to the numerous others wishing to honour the memory of the supreme Florentine poet on the seventh centenary of his death. Each letter is a product of its time: one hundred years ago, the Pope—still confined within the Vatican and refusing to recognise the Kingdom of Italy due to the Roman Question—addressed his text “to the beloved sons, professors and pupils of literary institutes and centres of higher learning within the Catholic world”; Paul VI, in full accord with the spirit of the Second Vatican Council and its vision of a Church seeking collaboration with the world, addressed his writing to Dante scholars more broadly, and within the same letter, together with other academic authorities, established the Chair of Dante Studies at the Catholic University of the Sacred Heart in Milan; Pope Francis today, in his outward-facing style of evangelisation, challenges everyone to (re)read Dante, whose teaching remains relevant seven hundred years after his death. Despite the differing political contexts and ecclesial agendas, Benedict XV, Paul VI, and Pope Francis are united on one point: Dante is a Christian poet—critical of the Church, certainly, but loyal to his faith and desirous of a religious institution that is more serious and less corrupt. This brief study presents the homage which the Church, today, seven centuries later, renders to this Poet—now widely recognised as a passionate witness of an arduous and active faith, in pursuit of justice and freedom. Full article

Employees’ green voice behavior (GVB), as a specific category of extra-role green behavior, plays a vital role in promoting a firm’s sustainable development. However, its underlying mechanism has not been sufficiently explored. Drawing on social learning theory (SLT), this study proposes a research model that examines the indirect influence of environmentally-specific transformational leadership (ESTFL) on GVB via psychological empowerment (PE) and ecological reflexivity (ER) as well as the moderating role of person-supervisor value congruence (PSVC). To achieve the research goals, we conducted a two-wave online survey via the convenience sampling method to collect data from 530 employees and 106 direct supervisors working in the manufacturing, hospitality and service, energy production, construction, transportation, information and communication, and finance industries in China. Regression analyses and CFA based on SPSS and Mplus were employed to test and validate the research model. Our findings show that PE and ER both partially mediated the positive association between ESTFL and GVB. Moreover, PSVC moderated the mediating effects of ESTFL on GVB via PE and ER. This study advances empirical research regarding how leadership impacts GVB by revealing dual cognitive mechanisms and identifying its boundary condition. It also offers managerial implications for leaders and enterprises in China to promote employees’ GVB and improve sustainable management. Full article

Production involves processes such as raw material extraction, energy consumption, and waste management, which can lead to significant environmental consequences. Therefore, supplier selection based not only on technical performance but also on environmental sustainability criteria has become a fundamental component of eco-friendly manufacturing strategies. Moreover, in the selection of electric vehicle batteries, it is essential to consider customer demands alongside environmental factors. Accordingly, selected suppliers should fulfill company expectations while also reflecting the “voice” of the customer. The objective of this study is to propose an integrated approach for green supplier selection by taking into account various environmental performance requirements and criteria. The proposed approach evaluates battery suppliers with respect to both customer requirements and green criteria. To construct the relational structure, the DEMATEL method was employed to analyze the interrelationships among customer requirements (CRs). Subsequently, the Quality Function Deployment (QFD) model was used to establish a central relational matrix that captures the degree of correlation between each pair of supplier selection criteria and CRs. Finally, to evaluate and rank alternative suppliers, the Interval Type-2 Fuzzy VIKOR (IT2 F-VIKOR) method was applied. The hybrid approach proposed by us, integrating DEMATEL, QFD, and IT2 F-VIKOR, offers significant improvements over traditional methods. Unlike previous approaches that focus independently on customer preferences or supplier criteria, our model provides a unified evaluation by considering both dimensions simultaneously. Furthermore, the use of Interval Type-2 Fuzzy Logic enables the model to better manage uncertainty and ambiguity in expert judgments, yielding more reliable results compared to conventional fuzzy approaches. Additionally, the applicability of the model has been demonstrated through a real-world case study, confirming its practical relevance and robustness in the selection of green suppliers for electric vehicle battery procurement. Full article

The integration of intelligent voice-control systems represents a critical pathway for enhancing driver comfort and reducing cognitive distraction in modern vehicles. Currently, voice assistants capable of accessing real-time vehicular data (e.g., engine parameters) or controlling actuators (e.g., door locks) remain exclusive to premium brands. While aftermarket solutions like Amazon’s Echo Auto provide multimedia functionality, they lack access to critical vehicle systems. To address this gap, we develop a novel architecture leveraging the OBD-II port to enable voice-controlled telematics and actuation in mass-production vehicles. Our system interfaces with a Toyota Hilux (2020) and Mazda CX-3 SUV (2021), utilizing an MCP2515 CAN controller for engine control unit (ECU) communication, an Arduino Nano for data processing, and an ESP01 Wi-Fi module for cloud transmission. The Blynk IoT platform orchestrates data flow and provides user interfaces, while a Voiceflow-programmed Alexa skill enables natural language commands (e.g., “unlock doors”) via Alexa Auto. Experimental validation confirms the successful real-time monitoring of engine variables (coolant temperature, air–fuel ratio, ignition timing) and secure door-lock control. This work demonstrates that high-end vehicle capabilities—previously restricted to luxury segments—can be effectively implemented in series-production automobiles through standardized OBD-II protocols and IoT integration, establishing a scalable framework for next-generation in-vehicle assistants. Full article

Workplace bullying is a widespread yet rarely recognized stressor that impairs employee productivity and organizational harmony. It requires attention in the hospitality industry, where a high volume of interpersonal interactions occurs. It is essential to address employees’ overall outlook and attitudes toward hardships resulting from stressful work environments. This study examined workplace bullying by highlighting the role of psychological capital in employees’ responses to hostile work environments. The relationships among employee voice, perceived organizational support, organizational commitment, and intention to stay were further elaborated based on a conceptual model. An online survey was distributed to hotel employees, and the results were analyzed using structural equation modeling. The indirect effects of psychological capital on perceived organizational support and organizational commitment were stronger than those of workplace bullying. The results demonstrate that employees with higher psychological capital have more proactive response tendencies to workplace bullying. Full article

Proclaiming Our Roots (POR) began as an academic community-based research initiative documenting Afro-Indigenous identities and lived experiences through digital oral storytelling. Since its inception, Proclaiming Our Roots has grown into a grassroots social movement focused on self-determination, cultural reclamation, and resistance to colonial erasure. This paper explores Proclaiming Our Root’s evolution, from a research project to a grassroots social movement, analyzing how storytelling, relational accountability, and Indigenous, Black, and Afro-Indigenous governance have shaped its development. Drawing on Indigenous methodologies and grounded in Afro-Indigenous worldviews, we examine how POR mobilizes digital storytelling, community gatherings, and intergenerational dialog to give voice to Afro-Indigenous identity, build collective consciousness, and challenge dominant narratives that erase or marginalize Black, Indigenous, and Afro-Indigenous presence. Through a sharing circle involving Proclaiming Our Roots community members, advisory council members, and the research team, in this paper we identify key themes that reflect the movement’s transformative impact: Identity and Belonging, Storytelling as Decolonial Praxis, Healing, Spirituality and Collective Consciousness, and Resistance and Social Movement Building. We discuss how these themes illustrate Proclaiming Our Roots’ dual role as a site of knowledge production and political action, navigating tensions between institutional affiliation and community autonomy. By prioritizing Afro-Indigenous epistemologies and centering lived experience, POR demonstrates how academic research can be a foundation for long-term, relational, and community-led movement-building. In this paper, we want to contribute to broader discussions around the sustainability of grassroots movements, the role of storytelling in social change for Indigenous and Black Peoples, and the possibilities of decolonial knowledge production as epistemic justice. We offer a model for how academic research-initiated projects can remain accountable to the communities with whom we work, while actively participating in liberatory re-imaginings. Full article

This paper tackles the logistics dilemma of how to meet customer expectations while at the same time respecting the internal processes and financial interests of the company and ensuring long-term sustainability. In this paper, integrated Quality Function Deployment (QFD) and Balanced Scorecard (BSC) techniques developed a method for the structured planning of logistics strategies. BSC, combined with QFD, gives the opportunity not only to “translate” the voice of the customer but also to focus on the company’s interests from four perspectives. For example, for products, we evaluated the interactions between different expectations, and the focus was on the disputes that arise during the expectations. The result of this paper is that Extended QFD provides a new method to formulate the various requirements. This method is suitable for creating a sustainable logistics strategy. Full article

The Mosaic approach has been effectively used to gather children’s voices in early childhood settings using a children’s voices framework, although research translation using these voices is less reported. This paper bridges this gap by reporting on the voices of young children from military and veteran families and the free, narrative-based resources co-created using these voices to strengthen children’s capacity to survive and thrive in these families. Children from military families can experience frequent relocations, multiple and prolonged parental deployments and heightened anxiety about the safety of the member parent. Children from military and veteran families might also experience the challenges of living with a parent who is injured (physically, mentally and/or morally). The children’s voices gathered in an initial study revealed four themes about their experiences in Australian military and veteran families, namely, (i) Department of Defence supports, (ii) communication, (iii) acculturation and ritual, and (iv) narrative. The research team worked with the affected community and partners to co-create resources that aligned with these themes. To achieve this, the team conducted an additional online survey with community members who had lived experience in military and veteran families, along with research partners and professionals who supported these families. The aim was to identify the types of resources and content they felt would best support children’s psychosocial development. The children’s voices, subsequent research data, and the literature were woven together to co-create free, online research-based educational and psychosocial resources to strengthen the coping strategies of young children from these families. This will interest those who aim for children’s voices not only to be heard but to have an impact on the world. Full article

Background: Amyotrophic Lateral Sclerosis (ALS) is a progressive neurodegenerative disease affecting both upper and lower motor neurons, with bulbar dysfunction manifesting in up to 80% of patients. Dysarthria, characterized by impaired speech production, is common in ALS and often correlates with disease severity. Voice analysis has emerged as a promising tool for detecting disease progression and monitoring functional status. Methods: This study investigates acoustic and biomechanical voice alterations in ALS patients and their association with clinical measures of functional independence. A descriptive observational case series study was conducted, involving 43 ALS patients and 43 age and sex matched controls with non-neurological voice disorders. Sustained vowel /a/ recordings were obtained and analyzed using Voice Clinical Systems^® and Praat software (version 6.2.22). Biomechanical and acoustic parameters were correlated with ALS Functional Rating Scale-Revised (ALSFRS-R) and Barthel Index scores. Results: Significant differences were observed between ALS and control groups (elevated muscle force and tension and interedge distance in non-ALS individuals). Between bulbar and spinal ALS subtypes, elevated values were observed in certain parameters in Bulbar ALS patients, indicating irregular vocal fold contact and weakened phonatory control, while spinal ALS exhibited increased values, suggesting higher phonatory muscle tension. Elevated biomechanical parameters were significantly correlated with low ALSFRS-R scores, suggesting a possible relationship between voice measures and functional decline. However, acoustic measurements showed no relationship with performance status. Conclusions: These results highlight the potential of voice analysis as a non-invasive, objective tool for monitoring ALS stage and differentiating between subtypes. Further research is needed to validate these findings and explore their clinical applications. Full article

This article proposes a close reading of Rivers Solomon’s 2019 novella The Deep, a recent eco-story about water, memory, and survival. Solomon’s work is inspired by a song called “The Deep” from experimental hip-hop group clipping, a dark science fiction tale about the underwater-dwelling descendants of African women thrown off slave ships during the Middle Passage. This imaginative alternate history, or counter-mythology, was invented by the Detroit techno band Drexciya, which, in a series of releases between 1992 and 2002, tells us the story of an underwater realm in the mid-Atlantic, where merpeople and their descendants establish a utopian society in the sea, free from the war and racism on the surface. My analysis uses Saidiya Hartman’s “critical fabulation” to make productive sense of the gaps in the archive of trans-Atlantic slavery that silence the voices of enslaved women, listening to the voices of water to imagine not only what was but also what could be. Moreover, this article examines The Deep through a trajectory that moves from the ocean as a space that reproduces death only to the ocean as a generative force for posthuman and multispecies kinship. Using Black hydrocriticism, hydrofeminism, and econarratology, I will argue that this transition is made possible by the “despatialization” of the ocean—a concept introduced by Erin James—where the ocean is conceived not as a fixed or stable environment, but as a space in constant flux, defying stability, and the subsequent immersion in its waters. Full article

Lingual stops are among the earliest sounds acquired by young children, but the process of acquiring the temporal coordination of lingual gestures necessary for the production of stop consonants appears to be protracted. The current research aims to investigate the developmental process of lingual stop consonants in 100 Mandarin-speaking 2- to 5-year-olds using the acoustic parameter voice onset time (VOT). Children were engaged in a word-repetition task and recorded while producing words that begin with /t/, /d/, /k/, and /g/. Results indicate well-established contrasts between /t/ and /d/ as well as between /k/ and /g/ by age 2. However, comparing with adults’ speech patterns, children’s speech productions are characterized by greater within-category dispersion and overlap, as well as smaller phoneme discriminability. Mandarin-speaking children also go through an “overshoot” stage by producing longer-than-adult VOT values, especially for voiceless aspirated stops /t/ and /k/. Lastly, unlike adults who exhibit gender-specific patterns in VOT, boys and girls do not show distinct patterns in their VOT by age 5. These results will be discussed in relation to children’s lingual motor control development and the organization of phonological and phonetic structures during the process of language acquisition. Full article

This study investigates consonant devoicing in Brazilian Portuguese (BP), in order to assess whether an ongoing sound change is taking place. We examine plural forms consisting of a stop consonant followed by a word-final sibilant, such as in redes [hedz] ~ [heds] ~ [hets] and sedes [sɛdz] ~ [sɛds] ~ [sɛts], focusing on the emergence of voiceless sibilants before word-initial vowels (e.g., redes amarelas, ‘yellow hammocks’). If sibilants remain voiceless despite a following vowel, this challenges the expected regressive voicing assimilation in BP and raises the question of the conditions under which this devoicing occurs. Data were collected through recordings of oral production from twenty Brazilian speakers, using reading and picture naming tasks. Sibilant voicing was quantified using harmonics-to-noise ratio (HNR). A linear mixed-effects model—including random intercepts and slopes for both speakers and words—reveals that sibilants are significantly more voiced before a vowel than before a pause, but this voicing is substantially reduced when the sibilant is preceded by voiceless consonants. These findings indicate an ongoing devoicing process at pre-vocalic word boundaries in BP, affecting clusters [pz, tz, kz] and [bz, dz, gz] alike. Spectrographic analyses indicate that not only the sibilants but also their preceding stop may exhibit devoicing. Moreover, minimal-pair considerations suggest that speakers potentially maintain sibilant voicing in certain lexical items to preserve intelligibility (e.g., gra[dz] ‘grades’ and se[dz] ‘headquarters’ vs. grá[ts] ‘free’ and se[ts] ‘sets’). Drawing on Exemplar Theory, we propose a competition between the influence of the phonological environment and word-final devoicing: sibilants are sometimes voiced due to a following vowel (e.g., botes argentinos [bɔtz ah.ʒẽ.’tʃi.nus] ‘Argentine boats’), but they often emerge as voiceless due to consonantal devoicing (e.g., [bɔts ah.ʒẽ.’tʃi.nus]), resulting in both expected and unexpected forms. We suggest that fine phonetic detail, whether associated with allophonic or emergent sound patterns, contributes to the construction of phonological representations. Full article

This study explores the relationship between formant frequencies and the directivity patterns of the Greek singing voice. Recordings were conducted in a controlled acoustic environment with four professional singers, two trained in classical music and two in Byzantine chant. Using microphones placed symmetrically on a hemispherical structure, participants sang the Greek vowels across different registers. Directivity patterns were analyzed in third-octave bands centered on each singer’s first three formant frequencies (F1, F2, F3). The results indicate that directivity patterns vary with register and center frequency, with differences observed across vowels and singers. These findings contribute to vocal production research and the development of simulation, auralization, and virtual reality applications for speech and music. Full article