Orientador: Martha Herr / Coorientador: Silvia Maria Rebelo Pinho / Banca: Luiz Ricardo Basso Ballestero / Banca: Ângelo José Fernandes / Resumo: Este trabalho investiga algumas características referentes à nasalidade no canto em português brasileiro, através de um estudo sobre a articulação e representação fonética das vogais nasais neste idioma. O estudo busca auxiliar o intérprete e o professor de canto no reconhecimento e administração destas características de forma a contribuir para uma maior liberdade vocálica e definição do gesto articulatório da nasalidade no canto em português brasileiro. O trabalho consiste na organização de informações coletadas através de referências da área da voz cantada e da linguística, que evidenciam ferramentas para a reflexão sobre uma nova possibilidade de transcrição fonética das vogais nasais para o canto em português brasileiro / Abstract: This research aims to investigate the nasality in brazilian portuguese as sung, through a study about the articulation and phonetic representations of nasal vowels in this language. The study aims to assist the performer and singing teacher in the recognition and management of these features in order to contribute to greater freedom and definition of the nasality articulatory gesture in Brazilian Portuguese. This work organize information collected through referrals from the area of singing voice and linguistic, showing tools for thinking about a new possibility of phonetic transcription of nasal vowels for singing in Brazilian Portuguese / Mestre

Ph.D. / Computer Science and Electrical Engineering / Nasalization refers to the process of speech production in which significant amounts of airfow and sound energy are transmitted through the nasal tract. In phonetics, nasalization is necessary for certain phonemes to be produced in normal speech; and it can also be a normal consequence of coarticulation. In disordered speech, however, inappropriate nasalization can be one of the causes that reduces the intelligibility of speech. Instrumental measurement and analysis techniques are needed for better understanding the relationship between the physiological status and the aerodynamic and acoustic effects of nasalization during speech. The main aim of the research work presented in this dissertation is to investigate the aerodynamic and acoustic effects of nasalization, and to develop objective approaches to measure, analyze, and detect the nasalized segments in speech. Based on an extensive survey of existing literature on the measurements of velopharyngeal function, the acoustic production models of speech, the analysis methods and results of normal nasalization, and the analysis methods of resonance disorders, it is understood that the final acoustic representation of nasalization is a complex outcome that is affected by the degree of velopharyngeal opening, the variation of vocal tract configurations, the mixture of multiple acoustic channels and speaker differences. It is proposed to incorporate more available information besides single channel acoustic signals during the analysis of nasalization. In our research work, a parallel study of acoustic and aerodynamic signals reveals the complimentary information within the signals. In addition, dual-channel acoustic studies help to understand the acoustic relationship between the oral and nasal cavities, and show inherent advantages over the single-channel analysis. Based on the derivation and analysis of the dual-channel acoustic properties, automatic detectors of nasalization are developed and successfully tested. The techniques developed in these explorations provide novel instrumental and analysis approaches to possible applications such as phonetic studies of the normal nasalization process, clinical assessment of disordered nasal resonance, and special feature extraction for speech recognition.

Made available in DSpace on 2014-06-11T19:26:46Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-06-29Bitstream added on 2014-06-13T20:55:17Z : No. of bitstreams: 1 hannuch_sm_me_ia.pdf: 476337 bytes, checksum: cee87222ea505982ea8ce1eadac54475 (MD5) / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / Este trabalho investiga algumas características referentes à nasalidade no canto em português brasileiro, através de um estudo sobre a articulação e representação fonética das vogais nasais neste idioma. O estudo busca auxiliar o intérprete e o professor de canto no reconhecimento e administração destas características de forma a contribuir para uma maior liberdade vocálica e definição do gesto articulatório da nasalidade no canto em português brasileiro. O trabalho consiste na organização de informações coletadas através de referências da área da voz cantada e da linguística, que evidenciam ferramentas para a reflexão sobre uma nova possibilidade de transcrição fonética das vogais nasais para o canto em português brasileiro / This research aims to investigate the nasality in brazilian portuguese as sung, through a study about the articulation and phonetic representations of nasal vowels in this language. The study aims to assist the performer and singing teacher in the recognition and management of these features in order to contribute to greater freedom and definition of the nasality articulatory gesture in Brazilian Portuguese. This work organize information collected through referrals from the area of singing voice and linguistic, showing tools for thinking about a new possibility of phonetic transcription of nasal vowels for singing in Brazilian Portuguese