F0 SD
Sex	Vowel	Upright	Supine	Difference
F	a	11.50	6.95	−4.55
	ae	7.59	10.79	3.19
	i	8.68	7.40	−1.28
	u	8.68	9.68	0.99
M	a	8.67	5.81	−2.86
	ae	4.91	5.90	0.99
	i	5.56	5.32	−0.23
	u	6.97	7.33	0.36

		F1 SD			F2 SD
Sex	Vowel	Upright	Supine	Difference	Upright	Supine	Difference
F	a	45.05	47.92	2.88	62.43	47.22	−15.21
	ae	65.54	70.56	5.02	67.33	99.97	32.64
	i	22.07	18.51	−3.56	85.14	107.46	22.32
	u	21.40	18.08	−3.32	280.74	284.96	4.22
M	a	25.12	29.44	4.32	56.96	52.29	−4.67
	ae	29.96	37.32	7.35	43.19	56.59	13.40
	i	15.25	14.62	−0.63	73.36	65.68	−7.68
	u	20.12	19.07	−1.05	227.13	233.16	6.03

		F3 SD			F4 SD
Sex	Vowel	Upright	Supine	Difference	Upright	Supine	Difference
F	a	84.26	98.97	14.71	144.75	165.01	20.27
	ae	82.42	82.24	−0.18	135.98	114.52	−21.46
	i	114.00	127.84	13.84	93.53	71.25	−22.28
	u	89.34	93.80	4.46	122.94	128.46	5.52
M	a	54.03	81.65	27.62	119.54	175.03	55.49
	ae	85.73	85.39	−0.33	165.72	166.76	1.04
	i	88.20	100.82	12.61	100.99	216.04	115.05
	u	79.03	91.28	12.25	119.25	116.32	−2.93