Review Of The Current Methodology Used For Assessing Hypernasality

1593 WordsApr 5, 20177 Pages
Review of the Current Methodology used for Assessing Hypernasality 1. Assessing Hypernasality Velopharyngeal insufficiency (VPI) which is associated with clef palate is characterized by anatomical dysfunction in the closure of velopharyngeal mechanism (Larangeria et al., 2016). The result of VPI can lead to various resonance disorders which consequently change the perception of sound during speech production. One of the known resonance disorders is hypernasality in which abnormal resonance is marked by increased airflow through the nose during speech due to VPI or fistula (Vogel, Ibrahim, Reilly, & Kilpatrick, 2009). The assessment of hypernasality is still an area that remains under investigation. Primary concerns are finding a…show more content…
With exception of Sweeney and Sell (2008), all articles maintained credibility of their results by determining inter-rater reliability of at minimum two experienced speech language pathologists. However, only one paper took into consideration the comparison experience level of the evaluator to accuracy of the ratings (Brunnegård, Lohmander, & van Doorn, 2012). Brunnegård et al., (2012) demonstrated that an experienced speech language pathologist is necessary in yielding valid ratings. Determining the need for an experienced evaluator allowed for some of the variability in perceptual ratings to be accounted for. Another consideration is there is no standard scale used for evaluation. Various Likert scales ranging in 4 point, 5 point and 6 point scales were used among the current literature under review. The variation found makes it difficult to compare perceptual ratings across studies and across clinical settings. Consequently, findings show that subjective nature of perceptual assessment can lead to errors in assessment. Therefore, in recent years finding objective instruments to measure hypernasality have been of primary concern. These methods often use various acoustic parameters to establish a standardized measure of hypernasality. 3. Objective Assessment 3.1 Acoustic Parameters 3.1.1 Nasometer Assessment The nasometer calculates a ratio from the acoustic outputs of the nasal and oral cavities to produce a

    More about Review Of The Current Methodology Used For Assessing Hypernasality

      Open Document