Spectral properties of fricatives in amyotrophic lateral sclerosis.


Spectral characteristics of word initial /s/ and "sh" produced by individuals with amyotrophic lateral sclerosis (ALS) and healthy controls were quantified using spectral moment analysis. Coefficients of the first four moments were used as descriptive indices of central tendency, spread of energy, shape, and peakedness. The relationship between select… (More)