TABLE III.

Vowel space area (Hz²), vowel space dispersion (Hz), and vowel peripheralization (Hz) results for each English and Croatian talker in two speaking styles. Negative sign indicates vowel space area reduction and a move towards the vowel space center rather than towards the periphery for talker EF1.

	Vowel space area (Hz2)				Vowel space dispersion (Hz)				Vowel space peripheralization (Hz) in clear speech (relative to conv.)
Talker	Conv.	Clear	Cl-Conv.	Diff. (prop. conv.)	Conv.	Clear	Cl-Conv.	Diff. (prop. conv.)	a	i	u	Ave.
EF3	101 048.06	159 701.50	58 653.44	0.58	457.17	549.52	92.35	0.20	54.39	191.50	37.80	94.57
EF2	116 190.42	167 536.05	51 345.63	0.44	513.62	595.70	82.09	0.16	67.01	144.98	35.80	82.60
EF1	235 006.41	221 917.33	−13 089.09	−0.06	633.96	648.83	14.87	0.02	32.36	64.92	−68.10	9.73
EM2	157 295.10	203 727.19	46 432.09	0.30	444.15	508.21	64.06	0.14	21.00	86.42	85.15	64.19
EM1	83 843.63	141 049.68	57 206.05	0.68	436.50	509.62	73.12	0.17	53.09	67.75	185.31	102.05
Avg.	138 676.72	178 786.35	40 109.62	0.39	497.08	562.38	65.30	0.14	45.57	111.12	55.19	70.63
CM1	121 897.66	197 783.65	75 886.00	0.62	420.21	508.72	88.51	0.21	39.86	75.71	186.29	100.62
CM2	164 867.28	246 607.29	81 740.00	0.50	489.70	549.09	59.38	0.12	67.94	65.14	91.64	74.91
CM3	137 553.06	178 709.15	41 156.10	0.30	493.70	522.40	28.70	0.06	28.56	53.52	46.39	42.82
CF2	488 133.66	585 893.24	97 759.58	0.20	791.85	815.35	23.50	0.03	81.52	54.71	110.12	82.12
CF1	184 795.81	284 005.05	99 209.24	0.54	522.64	663.28	140.64	0.27	4.63	214.11	259.18	159.30
Avg.	219 449.49	298 599.68	79 150.18	0.43	543.62	611.77	68.15	0.14	44.50	92.64	138.72	91.95