Table 1. TIMIT phone duration statistics for the longest (/aw/) and shortest (/b/) phones in the set of 48 phones used for training.

Columns show mean, standard deviation, maximum and minimum duration. The last column indicates the percentage of phones with a duration shorter than 25ms.

Phone	Mean (ms)	SD (ms)	Max (ms)	Min (ms)	< 25ms (%)
/aw/	163.62	51.59	415.00	62.69	0.00
/b/	17.50	7.16	98.63	2.94	86.08