Fig. 1From: Analysis of voice quality in patients with late-onset Pompe diseaseNasalization analysis of two sustained vowel sounds /i/ articulated by patients with late-onset Pompe disease (group 1). Two time signals (top), measurement of the nasalization coefficient (central) and time level variations in dB (bottom) of nose (continuous line) and mouth (broken line) signals. In healthy children’s voices, this coefficient does not exceed 20 %. This is typical for hypernasal speechBack to article page