Table 3 Major frequency distribution of vowel process types according to the same or different orthographic and pronounced forms

Types	Processes	Male	Female	Old	Young
Samevowels	aa>aa	5,700	5,220	5,767	5,153
	ae>ae	8,839	9,198	9,504	8,533
	ah>ah	20,831	17,427	21,293	16,965
	aw>aw	2,689	2,137	2,650	2,176
	ay>ay	11,297	11,722	11,390	11,629
	eh>eh	10,193	9,339	10,882	8,650
	er>er	5,822	4,944	6,127	4,639
	ey>ey	7,205	6,678	7,853	6,030
	ih>ih	18,634	18,051	19,450	17,235
	iy>iy	14,770	14,300	15,621	13,449
	ow>ow	8,491	9,317	9,896	7,912
	uh>uh	1,473	1,692	1,757	1,408
	uw>uw	5,642	5,187	6,000	4,838
Total		121,586	115,212	128,190	108,617
Different vowels	aa>ao	2,666	2,155	2,805	2,016
	ae>eh	5,009	3,795	4,722	4,082
	ah>ih	3,573	4,577	3,935	4,215
	ey>ah	2,248	1,699	2,196	1,751
	ih>ah	2,555	1,933	2,432	2,056
	ih>iy	1,654	1,603	1,667	1,590
	iy>ah	2,738	2,151	2,803	2,086
	iy>ih	2,466	2,359	2,481	2,344
	ow>ah	1,747	1,354	1,508	1,593
	ow>ao	1,819	1,427	1,784	1,462
	ow>er	1,414	1,278	1,455	1,237
	uw>ah	2,048	1,966	2,311	1,703
	uw>ih	2,463	3,234	3,342	2,355
Total		32,400	29,531	33,441	28,490