Table 2 A contingency table of orthographic labels (Ortho) (columns) and pronounced phonetic symbols (Prono) (rows) of the Buckeye Corpus

Pron\Ortho	aa	ae	ah	ao	aw	ay	eh	er	ey	ih	iy	ow	oy	uh	uw	null	Total
aa	10,920	47	1,197	4,821	50	35	108	487	5	67	12	113	12	20	4	48	17,946
ae	204	18,037	2,660	6	17	34	8,804	24	157	3,307	25	10	1	94	13	311	33,704
ah	475	90	38,258	283	16	76	2,234	1,091	88	8,150	79	113	5	963	136	3,726	55,783
aw	699	150	145	16	4,826	8	13		1	3		37	99				5,997
ay	2,011	352	2,602	23	25	23,019	757	3	112	167	119	3	5	8	1	63	29,270
eh	31	67	2,487	11	4	22	19,532	834	176	2,052	40	19	2	66	17	250	25,610
er	9		1,152	11			125	10,766	11	275	33	9		50	6	248	12,695
ey	142	32	3,947	4		42	1,630	53	13,883	1,224	143	17	8	63	14	199	21,401
ih	17	24	4,488	7	1	81	2,144	289	282	36,685	3,257	7	2	484	63	63	47,894
iy	15	17	4,889	4	1	76	436	300	221	4,825	29,070	20	1	172	87	602	40,736
ow	260	16	3,101	3,246	47	5	165	2,692	11	235	13	17,808	34	207	74		27,914
oy	1		6	1								5	480				493
uh	2		274	3		2	12	24	1	409	21	9		3,165	133	72	4,127
uw	16	16	4,014	16	3	12	475	840	18	5,697	702	44		625	10,838	907	24,223
Sum	14,802	18,848	69,220	8,452	4,990	23,412	36,435	17,403	14,966	63,096	33,514	18,214	649	5,917	11,386	6,489	347,793