By Marie K. Huffman, Rena A. Krakow, Stephen R. Anderson, Patricia A. Keating
Even if nasalization has been mentioned within the context of extra common elements of linguistics in different books, this article is the 1st and first source focusing completely on nasalization. This quantity positive factors articles discussing all elements of nasalization, together with body structure, belief, aerodynamics, acoustics, phonetic and phonological representations, learn method, and instrumentation. each one bankruptcy examines vital study advances completed in the final ten years and closes with an in depth dialogue of the present study
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Additional info for Nasals, Nasalization, and the Velum. Nasalization Velopharyngeal Function
Example text
Adapted from Horii (1980) with permission. cate increased nasality, it is surprising that the subjects' overall voice quality was judged to have improved. Spectral analysis of the accelerometer signals suggested that, rather than indicating increased nasality, the higher HONC values were due to a reduction in the amplitude of the throat accelerometer signal, caused by a change toward more breathy or less pressed phonation. Nasal airflow data supported the conclusion that there had not been an increase in nasality: nasal airflow did not increase with the increase in the HONC index.
Airflow data relevant to studies of nasalization are obtained by channeling the air into a pressure measurement device that is used to transduce the airflow into a time-varying electrical signal. Typically, the airflow measurement device is built into a mask which is placed over the nose or the nose and mouth. In the latter case, oral and nasal airflow are kept separate by a divider built into the mask; such a mask is called a split mask. Another commonly used device has a pressure transducer attached to a tube inserted in one nostril; a cork or a rubber plug through which the tube passes is used to seal the nostril and secure the tube.
The kinds of manipulations discussed here are not specific to studies of nasalization or velopharyngeal function but rather apply to the processing of speech production data in general. It should be noted at the outset that this is by no means a comprehensive treatment of these operations. For further information, the reader is referred to Abbs and Watkin (1976), Baken (1987, especially Chaps. 2, 3, and 10), and Kay et al. (1985). 1. Display An important part of any experimental study is the ability to obtain some visual representation of the data signal.