Formant analysis in dysphonic patients and automatic Arabic digit speech recognition

Table 3 Best accuracy (%) obtained in different voice disorders groups

Type of voice disorder	Best mixture	Best feature	Best accuracy
Normal	8 or 16	24	100%
Cyst	4	24	75%
LPRD	4	24	64%
Spasmodic Dysphonia	4	24	60%
Sulcus	1 or 16	24	56%
Nodules	1	24	84.50%
Polyp	1	24	61%

The best feature is 24 MFCC; however the best mixture varies with the types of disorder. The ASR system can correctly recognize all the digits spoken by persons with no voicing disorder. The performances with LPRD, spasmodic dysphonia, sulcus, and polyp are below 65% with the current ASR system.

ISSN: 1475-925X