Table A6.

The mean fundamental frequency (F0) in Hz and standard deviation pooled across vowels for a given speaker group are presented for both the manual F0 measurements and the Speech Acoustic Analysis Software Package default-generated F0 measurements. CSL = Computerized Speech Laboratory.

Speaker group	Manual measurements		CSL		Praat		TF32		WaveSurfer
	M	SD	M	SD	M	SD	M	SD	M	SD
Typically developing
Male adults	116.88	26.18	114.81	23.73	125.43	39.93	116.17	24.44	111.86	23.89
Female adults	218.20	33.31	213.24	31.25	215.39	34.53	218.72	32.37	214.28	31.33
Male children	239.49	33.61	234.07	33.70	233.46	47.58	240.69	35.54	234.58	46.04
Female children	238.04	18.29	240.58	21.42	237.45	12.02	238.65	17.89	238.47	17.60
Down syndrome
Male adults	146.42	17.78	141.63	23.89	142.16	16.42	144.80	17.68	144.57	17.47
Female adults	205.25	35.50	207.73	31.79	193.21	49.44	208.65	34.77	202.65	43.02
Male children	248.72	40.79	228.38	49.31	235.86	39.20	245.07	42.38	241.98	51.38
Female children	273.32	45.95	239.37	33.78	262.39	33.36	273.66	46.15	239.65	45.08