Nasalance

Nasalance is a measure of the degree of velopharyngeal opening in voiced speech formed by computing the ratio of the amplitude of the acoustic energy at the nares, A_n, to amplitude of the acoustic energy at the mouth, A_m. The term nasalance usually refers to this ratio as a percentage:

$\dfrac{A_n}{(A_m+A_n)}$

and thus may be more properly expressed as Percent Nasalance. The term originated in the work of Fletcher and his associates^[1][2] and is now implemented in a number of commercially available devices (Kay-PENTAX Nasometer and Glottal Enterprises NVS System). There are small differences in the manner in which nasalance is computed in various devices, and differences^[3] in the manner in which the oral and nasal acoustic energies are separated physically, as by a hard separator plate held against the upper lip vs. a two-chamber pneumotachograph mask. However, there have been no conclusive studies of the effect of these differences on a relevant underlying physical variable, such as the area of the velopharyngeal opening.

See also

• Nasalization
• Nasality

References

1. ^ Fletcher, S; Sooudi, I; Frost, S (1974). "Quantitative and graphic analysis of prosthetic treatment for 'nasalance' in speech". The Journal of Prosthetic Dentistry 32 (3): 284–91. doi:10.1016/0022-3913(74)90032-8. PMID 4373571. 
2. ^ R.J. Baken, Robert F. Orlikoff. Clinical Measurement of Speech and Voice San Diego: Singular, 2000^{[page needed]}
3. ^ http://www.rothenberg.org/Nasalance/Nasalance.htm

This phonetics article is a stub. You can help Wikipedia by expanding it.v · Categories: Human voice Phonetics stubs Wikimedia Foundation. 2010. Игры ⚽ Поможем написать реферат Nasal spine Nasalapur Look at other dictionaries: Nasality — In normal speech, nasality is referred to as nasalization and is a linguistic category that can apply to vowels or consonants in a specific language. The primary underlying physical variable determining the degree of nasality in normal speech is… …   Wikipedia Nasometry — refers to measurement of the modulation of the area of the velopharyngeal opening, using movements of the velum and pharyngeal walls, in speech and singing. The velopharyngeal opening connects the oral air passageway with the nasal air passageway …   Wikipedia Nasal emission — is the abnormal passing of oral air through a palatal cleft, or from some other type of velopharyngeal inadequacy (VPI), during the production of a consonant that requires a buildup of oral air pressure for proper pronunciation, such as /p/ or… …   Wikipedia Nasometrie — ist eine Messmethode der Nasalität und wird oft als Synonym für die getrennte Schalldruckmessung verwendet. Dabei findet die Messung des nasalen und oralen Schalls voneinander separiert statt, um so den Anteil des Signals aus dem Mund bzw.… …   Deutsch Wikipedia 18+ © Academic, 2000-2024 Contact us: Technical Support, Advertising Dictionaries export, created on PHP, Joomla, Drupal, WordPress, MODx. Mark and share Search through all dictionaries Translate… Search Internet Share the article and excerpts Direct link … Do a right-click on the link above and select “Copy Link”