Ninety-four aspiration signals were collected with a single-axis accelerometer placed infero-anterior to the thyroid notch from 23 children with Dysphagia. It was found that only 62% of aspiration signals can be considered stationary over short finite time windows. Further, 96% of aspiration signals violated normality to varying degrees. Nonstationarity was attributed to time-varying variance structure while departure from normality was linked to leptokurtic (more peaked than a normal distribution) amplitude distributions. Conventional assumptions of stationarity and normality do not simultaneously hold true for aspiration signals. Implications for automatic detection are mentioned.
CITATION STYLE
Chau, T., Casas, M., Berall, G., & Kenny, D. (2002). Testing the stationarity and normality of paediatric aspiration signals. In Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings (Vol. 1, pp. 186–187). https://doi.org/10.1109/iembs.2002.1134449
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