Table 2.

Confusion matrix for the narrow band vowel recognition algorithm.

		Vowel classified by the narrow band model
		∕i/	∕ɪ∕	∕e/	∕ɛ∕	∕æ∕	∕ɑ∕	∕ɔ∕	∕o/	∕ʊ∕	∕u/	∕ʌ∕	∕ɚ∕
Vowel intended by talker	∕i/	80.2	1.6	10.3	0.0	0.0	0.0	0.0	2.4	0.0	5.6	0.0	0.0
	∕ɪ∕	2.2	89.2	6.5	0.0	0.0	0.0	0.0	0.7	1.4	0.0	0.0	0.0
	∕e/	8.1	6.5	82.3	0.0	0.0	0.0	0.0	2.4	0.0	0.8	0.0	0.0
	∕ɛ∕	0.0	1.4	0.0	87.8	7.2	0.0	2.2	0.0	0.0	0.0	0.7	0.7
	∕æ∕	0.0	1.5	0.0	25.0	71.3	0.0	2.2	0.0	0.0	0.0	0.0	0.0
	∕ɑ∕	0.0	0.0	0.0	0.7	1.5	65.4	15.4	0.0	0.0	0.0	16.9	0.0
	∕ɔ∕	0.0	0.0	0.0	2.3	1.5	3.8	79.7	0.0	0.0	0.0	12.8	0.0
	∕o/	1.5	0.0	10.2	0.7	0.7	0.0	1.5	78.1	0.7	5.8	0.7	0.0
	∕ʊ∕	0.7	2.9	2.2	0.0	0.0	0.0	0.0	0.7	84.9	5.8	2.9	0.0
	∕u/	29.2	0.7	10.9	0.0	0.0	0.0	0.0	4.4	3.6	51.1	0.0	0.0
	∕ʌ∕	0.0	0.0	0.0	1.5	0.7	0.0	3.7	0.7	14.7	0.0	78.7	0.0
	∕ɚ∕	0.0	1.7	5.1	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	93.2
Response means:		10.2	8.8	10.6	9.8	6.9	5.8	8.7	7.5	8.8	5.8	9.4	7.8