표 5. | Table 5. 연결 발화와 관련된 음향 변수의 기술 통계(스펙트럼, 켑스트럼) | Descriptive statistics of acoustic variables related to connected speech (spectrum, cepstrum)

var.	Time	Fatigue	Mean	SD	n	var.	Time	Fatigue	Mean	SD	n
CPP	Before	NoYes	14.8515.55	1.832.62	2525	LH-ratio	Before	NoYes	1.5301.564	0.1100.202	2525
	After	NoYes	14.9715.95	2.172.61	2525		After	NoYes	1.5481.534	0.1430.144	2525
CPPs	Before	NoYes	5.4405.290	2.0042.274	2525	tilt	Before	NoYes	–3.596–3.732	0.9011.371	2525
	After	NoYes	5.4285.743	1.8332.156	2525		After	NoYes	–3.468–3.937	1.1131.154	2525
RNR	Before	NoYes	0.0870.109	0.0580.075	2525	Offset	Before	NoYes	24.2324.34	4.233.49	2525
	After	NoYes	0.1010.105	0.1010.105	2525		After	NoYes	23.0725.61	4.553.94	2525
Skewness	Before	NoYes	7.9849.269	2.8823.586	2525	lowE	Before	NoYes	73.17773.351	0.8110.658	2525
	After	NoYes	9.0458.566	3.1392.603	2525		After	NoYes	73.21973.228	0.7730.659	2525
Center of gravity	Before	NoYes	656.3544.3	389.7170.7	2525	highE	Before	NoYes	48.04647.648	3.4815.929	2525
	After	NoYes	572.9590.6	245.6205.7	2525		After	NoYes	47.65748.119	3.9504.418	2525

CPP, cepstral peak prominence; CPPs, smoothed CPP; RNR, rhamonics to noise ratio; LH-ratio, low to high ratio; lowE, low energy; highE, high energy.