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International Conference on Bio-Inspired Systems and Signal Processing (BIOSIGNALS 2011). pp. 295\u2013300."},{"key":"ref6","unstructured":"Heistermann T, Janke M, Wand M, Schultz T (2014) Spatial Artifact Detection for Multi-Channel EMG-Based Speech Recognition. Int Conf Bio-Inspired Syst Signal Process: 189\u2013196."},{"key":"ref7","unstructured":"Teixeira A (2000) S\u00edntese Articulat\u00f3ria das Vogais Nasais do Portugu\u00eas Europeu [Articulatory Synthesis of Nasal Vowels for European Portuguese] PhD Thesis, Universidade de Aveiro."},{"key":"ref8","unstructured":"Almeida A (1976) The Portuguese nasal vowels: Phonetics and phonemics. In: Schmidt-Radefelt J, editor. Readings in Portuguese Linguistics. Amsterdam. pp. 348\u2013396."},{"key":"ref9","unstructured":"Freitas J, Teixeira A, Dias MS (2012) Towards a Silent Speech Interface for Portuguese: Surface Electromyography and the nasality challenge. International Conference on Bio-inspired Systems and Signal Processing (BIOSIGNALS 2012). pp. 91\u2013100."},{"key":"ref10","first-page":"5","article-title":"An\u00e1lise de sons nasais e sons nasalizados do portugu\u00eas","volume":"6","author":"A Lacerda","year":"1966","journal-title":"Rev do Laborat\u00f3rio Fon\u00e9tica Exp Coimbra"},{"year":"1999","author":"R Sampson","key":"ref11"},{"key":"ref12","doi-asserted-by":"crossref","first-page":"171","DOI":"10.1016\/B978-0-12-360380-7.50011-9","article-title":"The perception of nasal vowels","volume":"5","author":"PS Beddor","year":"1993","journal-title":"Nasals, nasalization, and the velum"},{"key":"ref13","article-title":"The velopharyngeal muscles in speech: An electromyographic and cineradiographic study","volume":"50","author":"B Fritzell","year":"1969","journal-title":"Acta Otolaryngolica"},{"year":"1976","author":"WJ Hardcastle","key":"ref14"},{"year":"2009","author":"JA Seikel","key":"ref15"},{"key":"ref16","first-page":"348","article-title":"An electromyographic study of the musculus uvulae","volume":"25","author":"DP Kuehn","year":"1988","journal-title":"Cleft Palate J"},{"key":"ref17","doi-asserted-by":"crossref","first-page":"225","DOI":"10.1044\/jshr.1902.225","article-title":"An electromyographic study of velopharyngeal function in speech. J Speech","volume":"19","author":"F Bell-Berti","year":"1976","journal-title":"Lang Hear Res"},{"key":"ref18","first-page":"1","article-title":"An electromyographic-cinefluorographic investigation of velar function during normal speech production","volume":"5","author":"JF Lubker","year":"1968","journal-title":"Cleft Palate J"},{"key":"ref19","first-page":"25","article-title":"Relationships between muscle activity and velar position","volume":"19","author":"DP Kuehn","year":"1982","journal-title":"Cleft Palate J"},{"key":"ref20","doi-asserted-by":"crossref","first-page":"1503","DOI":"10.1016\/0021-9290(96)84547-7","article-title":"Appropriately placed surface EMG electrodes reflect deep muscle activity (psoas, quadratus lumborum, abdominal wall) in the lumbar spine","volume":"29","author":"S McGill","year":"1996","journal-title":"J Biomech"},{"key":"ref21","doi-asserted-by":"crossref","unstructured":"Teixeira A, Martins P, Oliveira C, Ferreira C, Silva A, Shosted R (2012) Real-time MRI for Portuguese: Database, methods and applications. 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Accessed: 2014 Oct 30."},{"key":"ref24","unstructured":"Ellis D (2003) Dynamic time warp (DTW) in Matlab."},{"key":"ref25","unstructured":"Tiede MK, Masaki S, Vatikiotis-Bateson E (2000) Contrasts in speech articulation observed in sitting and supine conditions. Proceedings of the 5th Seminar on Speech Production, Kloster Seeon, Bavaria. pp. 25\u201328."},{"key":"ref26","doi-asserted-by":"crossref","first-page":"465","DOI":"10.1250\/ast.26.465","article-title":"Difference in vocal tract shape between upright and supine postures: Observations by an open-type MRI scanner","volume":"26","author":"T Kitamura","year":"2005","journal-title":"Acoust Sci Technol"},{"key":"ref27","doi-asserted-by":"crossref","first-page":"532","DOI":"10.1121\/1.2715659","article-title":"Comparison of speech production in upright and supine position","volume":"122","author":"M Stone","year":"2007","journal-title":"J Acoust Soc Am"},{"key":"ref28","unstructured":"Wrench AA, Cleland J, Scobbie JM (2011) An ultrasound protocol for comparing tongue contours: upright vs. supine. Proceedings of 17th ICPhS, Hong Kong. pp. 2161\u20132164."},{"key":"ref29","first-page":"301","article-title":"Speech production: Models, Phonetic Processes and Techniques","author":"O Engwall","year":"2006"},{"key":"ref30","doi-asserted-by":"crossref","first-page":"123","DOI":"10.1597\/09-256","article-title":"Variations in velopharyngeal structures between upright and supine positions using upright magnetic resonance imaging","volume":"48","author":"JL Perry","year":"2011","journal-title":"Cleft Palate-Craniofacial J"},{"key":"ref31","doi-asserted-by":"crossref","first-page":"371","DOI":"10.1597\/1545-1569(1995)032<0371:EOGOVM>2.3.CO;2","article-title":"Effects of gravity on velopharyngeal muscle activity during speech","volume":"32","author":"JB Moon","year":"1995","journal-title":"Cleft palate-craniofacial J"},{"key":"ref32","doi-asserted-by":"crossref","unstructured":"Cover TM, Thomas JA (2005) Elements of Information Theory. 1\u2013748 p. <comment>doi: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/dx.doi.org\/10.1002\/047174882X\" xlink:type=\"simple\">10.1002\/047174882X<\/ext-link><\/comment>","DOI":"10.1002\/047174882X"},{"key":"ref33","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1016\/j.pneurobio.2005.10.003","article-title":"Nonlinear multivariate analysis of neurophysiological signals","volume":"77","author":"E Pereda","year":"2005","journal-title":"Prog Neurobiol"},{"key":"ref34","first-page":"115","article-title":"Entropy Measures, Maximum Entropy Principle and Emerging Applications","author":"YY Yao","year":"2003"},{"key":"ref35","doi-asserted-by":"crossref","first-page":"82","DOI":"10.1109\/10.204774","article-title":"A new strategy for multifunction myoelectric control","volume":"40","author":"B Hudgins","year":"1993","journal-title":"IEEE Trans Biomed Eng"},{"key":"ref36","unstructured":"Everitt BS, Hothorn T (2009) A Handbook of Statistical Analyses Using R. 360 p. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/books.google.com\/books?hl=en&lr=&id=5-XI_e-9LvYC&pgis=1\" xlink:type=\"simple\">http:\/\/books.google.com\/books?hl=en&amp;lr=&amp;id=5-XI_e-9LvYC&amp;pgis=1<\/ext-link>."},{"key":"ref37","unstructured":"R Development Core Team R (2011) R: A Language and Environment for Statistical Computing. R Found Stat Comput 1: 409. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/www.r-project.org\" xlink:type=\"simple\">http:\/\/www.r-project.org<\/ext-link>."},{"key":"ref38","doi-asserted-by":"crossref","first-page":"121","DOI":"10.1023\/A:1009715923555","article-title":"A tutorial on support vector machines for pattern recognition","volume":"2","author":"CJC Burges","year":"1998","journal-title":"Data Min Knowl Discov"},{"key":"ref39","doi-asserted-by":"crossref","first-page":"402","DOI":"10.1016\/0013-4694(87)90003-4","article-title":"EMG profiles during normal human walking: stride-to-stride and inter-subject variability","volume":"67","author":"DA Winter","year":"1987","journal-title":"Electroencephalogr Clin Neurophysiol"},{"key":"ref40","doi-asserted-by":"crossref","unstructured":"Maier-Hein L, Metze F, Schultz T, Waibel A (2005) Session independent non-audible speech recognition using surface electromyography. 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