http://reposit.library.du.ac.bd:8080/xmlui/xmlui/handle/123456789/131 2026-11-11T02:45:38Z http://reposit.library.du.ac.bd:8080/xmlui/xmlui/handle/123456789/4900 Phonetic and Phonological Features of Typical and Atypical Speech: Insights from Bangla Language Siddiqua, Tanzia The present research provides statistical analyses of the phonetic and phonological features for Bangla typical and atypical speech. It identifies and categorizes the distinctive sound features and then devises necessary articulatory and acoustic tools to analyze the data for Bangla typical and typical speech. The study identifies presences and absences of sounds, along with alterations, and also newly identifiable features following the distinctive feature matrix theory. It also looks into the articulatory and acoustic properties, theories, mechanisms, characteristics and transcription of typical and atypical speech, a synopsis of the standard variety, dialectical variations and individual differences, cross-linguistic perspective on Bangla phonetics and integrating features, existing IPA, extIPA chart along with historical contexts of Bangla typical and atypical speech. Later on, it suggests revisions of principles which were used in transcribing atypical speech of Bangla language. In order to collect data, two Task-based Phonological Tests has been devised: (a) picture naming and (b) word naming. All atypical participants are diagnosed aphasic patients, primarily from Bangladesh Medical University (formerly BSMMU) and Metropolitan Medical Centre Ltd. The patients have suffered from Broca’s Aphasia after cerebrovascular accident (CVA) with impressions of intracerebral haematoma in the cerebral hemisphere and are at the early stage of treatment and speech therapy, i.e., within 6 months to a year. The research was concluded by listing the most common features of atypical speech, along with affected organs. It identifies pre-palatalization /ʲ◌/, nasal release /◌ⁿ/, lip compression /◌͍/, fricative release /◌ˣ/ (and /◌ˢ/, /◌ᶠ/ as systematic release markers), strong articulation /◌͈/, weak articulation /◌͉/, inconsistent /O/, unaspirated /◌˭/ (often unmarked), unintelligible speech /◌/. pre-aspirated /ʰ◌/, partial devoicing /₍◌̥₎/, sliding articulation /◌͢◌/, double articulation /◌͡ ◌/, aspirated fricative /◌ʰˢ/ as newly identifiable symbols for atypical speech representation for Aphasic patients who speak Bangla as L1. Unintelligible speech /◌/ can also be suggested as new. Low tone (˨), Extra-Low Tone (˩), Weak Articulation (◌͉), Retracted Tongue-Root v Position (◌̙) are prominent in most utterances. In a few cases, Post-Alveolar Clicks (◌ǃ) and Palatal Clicks (◌ǂ) were observed. Various places of articulation include: /◌͉/ – linguolabial, /◌ʷ/ – labialized, /◌̪/ – dental, bidental /◌ʭ/, /◌ˠ/ – velarized, pre-palatalized /ʲ◌/, and manners of articulation include: /◌ˢ/ – sibilant, /◌̃/ – nasalized, nasal release /◌ⁿ/, /◌ʳ/ – trill/tap. As for organs, soft palate/Velum , back and the root of the tongue are mostly affected. Also, it finds that the highest form of atypical speech occurs due to velarization and nasal release/nasalization which can be considered under distortion. Other significant errors happen due to retracted tongue-root position, creaky-voice, rising-falling tone, nasal release/nasalization and no audible release. Creaky-voice and rising-falling tone can be considered as suprasegmental features, and retracted tongue-root position can cause phonological or acoustic errors which all leads to distortion. No audible release, on the other hand, can lead to omission. In addition, the research shows that in dialect variation, F1-F2 relationships shift in predictable and consistent ways. The research presents all the data in percentages. To summarize, the research aims to revisit and catalogue the articulatory and acoustic features of Bangla typical speech, devise necessary articulatory and acoustic tools to collect Bangla typical and atypical speech, and propose amendments to the existing extIPA for disordered speech in the context of Bangla atypical speech. Thus it provides a systemic analysis on speech production of atypical speech and bridges the gaps between the theoretical and practical applications. Hence, it provides culturally and linguistically appropriate research-based resources (e.g., pictographic tools, communication-ready materials) for speech-language pathologists (SLPs) dedicated towards Aphasic patients who speaks Bangla as their L1. In future, this shall add to the direct service to the patients and their families for assessment, therapy, support and build collaboration and capacity building among the professionals (speech-language therapists, health workers) through training, etc. Following this model, other disorders can also be explored. This thesis is submitted for the degree of Doctor of Philosophy. 2026-10-18T00:00:00Z http://reposit.library.du.ac.bd:8080/xmlui/xmlui/handle/123456789/4850 নোয়াখালী-উপভাষার ধ্বনিতাত্ত্বিক, রূপতাত্ত্বিক ও সমাজভাষাবৈজ্ঞানিক বৈশিষ্ট্য [ Phonological, Morphological and Sociolinguistic Features of the Noakhali-Dialect] হোসেন, মোহাম্মদ মোজাম্মেল ঢাকা বিশ্ববিদ্যালয়ে পিএইচডি ডিগ্রীর জন্য উপস্থাপিত অভিসন্দর্ভ। 2026-08-03T00:00:00Z http://reposit.library.du.ac.bd:8080/xmlui/xmlui/handle/123456789/3164 The Language of Bengali Children with Neurodevelopmental Disorders: A Neurolinguistic Study Ferdous, Fahmida Linguistic understanding, verbal expression of language, meaning inference, and perception are all hampered by Neuro-developmental Disorders (NDD). Individual processes are greatly impacted by defects in nervous system development; illustrated by this descriptive cross-sectional doctoral research on children with neurodevelopmental disorders has been carried out in tertiary-level hospitals from January 2017 to December 2022 in Bangladesh. The various NDDs (Autism Spectrum Disorder -ASD, Attention Deficit Hyperactivity Disorder - ADHD, Intellectual Development Disorder - IDD, and Cerebral Palsy -CP) have been observed in children. Face-to-face interviews and semi-structured questionnaires have been used to collect data. In all children having ASD, ADHD, IDD, and CP, all of them have found different levels of receptive/perceptive language development disorder (50.7%, 97.0%, 65.3%, and 84.0%), expressive language disorder (64.0%, 98.7%, 81.3%, and 98.7%), social / sociolinguistic development disorder (88.0%, 100.0%, 89.3%, and 78.7%), and behavioral disorder (80.0%, 97.0%, 64.0%, and 62.7%) respectively. Children with IDD and ADHD have phonemic awareness disorder (77.3%, and 85.1%). Metalinguistic competence disorder was observed in all children. For children with CP, the radiological finding of anatomical location was a hyperintense or hypointense area found in the frontal lobe (Broca's area) and basal ganglia (56%), temporal lobe (Wernicke's area) and basal ganglia (20%), and frontal, temporal and basal ganglia. A pathological finding was detected in the MRI report that had a noticeable relation (p<0.05) with the language area of the brain. However, children with IDD and ADHD have no organic abnormality detected pathologically in MRI of the brain. According to research, children with CP have significantly higher rates of both receptive language developmental disorder and expressive language development disorder than children with ASD. The receptive, expressive, and sociolinguistic developmental disorder was noticeable higher in children with ADHD than in children with ASD. Receptive language development disorder and sociolinguistic development disorder were observed to be significantly higher in children with ADHD than in children with CP. However, it was found similar in children with CP, ADHD, and IDD. As for the sociolinguistic development disorder, it has been found common in children with CP and ASD but has been found more frequent in children with IDD than in children with CP. It discovers that children with NDD frequently have language development disorders, demonstrating the interrelationship between the brain, body, and mind in the neurolinguistic process. The research proposes insightful strategies aimed at reducing the deleterious effects of language disorders and suggests early diagnosis and intervention with linguistic assessment and speech therapy. This is the first clinical doctoral research on this topic in Bangladesh. In fulfillment of the requirements for the degree Doctor of Philosophy in Linguistics. 2024-04-25T00:00:00Z http://reposit.library.du.ac.bd:8080/xmlui/xmlui/handle/123456789/2390 বাংলা ভাষায় লিখিত দাওয়াতপত্রে প্রতিফলিত বিনম্রতার স্বরূপ: একটি প্রয়োগার্থিক বিশ্লেষণ (The Form of Politeness Reflected in the Invitation Letter Written in Bangla Language: A Pragmatic Analysis) খায়রুন্নাহার, খন্দকার ঢাকা বিশ্ববিদ্যালয়ে পিএইচডি ডিগ্রীর জন্য উপস্থাপিত অভিসন্দর্ভ। 2023-06-13T00:00:00Z