References :

Fecher, N. and Watt, D. (2011) Speaking under cover: the effect of face-concealing garments on spectral properties of fricatives. Proceedings of the 17th International Congress of Phonetic Sciences, Hong Kong: 663–666.

Gold, E., French, P. and Harrison, P. (2013) Examining long-term formant distributions as a discriminant in forensic speaker comparisons under a likelihood ratio framework. Proceedings of Meetings on Acoustics 19(1). http://dx.doi.org/10.1121/1.4800285

Hughes, V., McDougall, K. and Foulkes, P. (2009) Diphthong dynamics in unscripted speech. Paper presented at the meeting of the International Association for Forensic Phonetics and Acoustics (IAFPA), Cambridge, UK.

Kitamura, T., Takemoto, H., Honda, K., Shimada, Y., Fujimoto, I., Syakudo, Y., Masaki, S., Kuroda, K., Oku-uchi, N. and Senda, M. (2005) Difference in vocal tract shape between upright and supine postures: observations by an open-type MRI scanner. Acoustical Science and Technology 26(5): 465–468. http://dx.doi.org/10.1250/ast.26.465

Kirchhübel, C. (2009) The effects of Lombard speech on vowel formant measurements. MSc thesis, University of York.

Künzel, H. J. (2001) Beware of the ‘telephone effect’: the influence of telephone transmission on the measurement of formant frequencies. Forensic Linguistics 8(1): 80–99.

Lindblom, B. (1990) Explaining phonetic variation: a sketch of the H&H theory. In W. J. Hardcastle and A. Marchal (eds) Speech Production and Speech Modelling 403–439. Dordrecht: Kluwer Academic Publishers. http://dx.doi.org/10.1007/978-94-009-2037-8_16

Mokhtari, P. and Clermont, F. (1996) A methodology for investigating vowel–speaker interactions in the acoustic-phonetic domain. Proceedings of the VIth Australian International Conference on Speech Science and Technology: 127–132.

Niimi, S., Kumada, M. and Niitsu, M. (1994) Functions of tongue-related muscles during production of the five Japanese vowels. Annual Bulletin of the Research Institute of Logopedics and Phoniatrics 28: 33–40.

Roberts, L. (2011) Acoustic effects of authentic and acted distress on fundamental frequency and vowel quality. Proceedings of the 17th International Congress of Phonetic Sciences, Hong Kong: 1694–1697.

Shiller, D. M., Ostry, D. J. and Gribble, P. L. (1999) Effects of gravitational load on jaw movements in speech. Journal of Neuroscience 19(20): 9073–9080.

South, A. J. (1999) Some characteristics of speech produced under high g-force and pressure breathing. Proceedings of the IEEE International Conference on Acoustics, Speech, and Signal Processing: 2095–2098. http://dx.doi.org/10.1109/icassp.1999.758346

Stone, M., Stock, G., Bunin, K., Kumar, K., Epstein, M., Kamhamettu, C., Li, M., Parthasarathy, V. and Prince, J. (2007) Comparison of speech production in upright and supine position. Journal of the Acoustical Society of America 122(1): 532–541. http://dx.doi.org/10.1121/1.2715659

Tiede, M. K., Masaki, S. and Vatikiotis-Bateson, E. (2000) Contrasts in speech articulation observed in sitting and supine conditions. Proceedings of the 5th Seminar on Speech Production: 25–28.