표 3. | Table 3. 모음 연장 발성과 관련된 음향 변수의 기술 통계 I(공명, 섭동, 운율): 단계 농담(gradation)으로 표현된 녹색 변수는 주 효과(시간)와 관련이 있고 주황색은 그룹×시간 상호작용과 관련되어 있다(표4, 5에서도 동일) | Descriptive statistics of acoustic variables related to sustained vowel I (resonance, perturbation, prosody). While graded green cell has to do with main effect (time), orange one is related to the group×time interaction (same in Table 4 & 5)

var.	Time	Fatigue	Mean	SD	n	var.	Time	Fatigue	Mean	SD	n
B1	Before	NoYes	328.5326.1	158.3201.5	25	NHR (main)	Before	NoYes	0.0720.048	0.1100.061	25
	After	NoYes	356.4358.2	172.7260.3	25		After	NoYes	0.0250.033	0.0160.025	25
B2	Before	NoYes	381.6333.8	254.5193.9	25	jit_local	Before	NoYes	0.6500.523	0.7020.499	25
	After	NoYes	370.2397.6	241.8376.9	25		After	NoYes	0.4140.497	0.1310.349	25
B3	Before	NoYes	604.8741.2	601.0524.6	25	shim_ local	Before	NoYes	7.1256.028	4.8993.194	25
	After	NoYes	640.4745.2	431.2700.3	25		After	NoYes	5.3016.497	2.7163.516	25
f1_dB	Before	NoYes	67.9668.23	9.838.23	25	f0	Before	NoYes	208.7208.5	17.7829.82	25
	After	NoYes	67.3568.75	7.128.46	25		After	NoYes	206.9203.9	21.1918.79	25
f2_dB	Before	NoYes	62.3362.90	9.858.95	25	Q-tone	Before	NoYes	22.0421.80	2.944.88	25
	After	NoYes	61.8363.34	8.869.54	25		After	NoYes	21.6921.22	3.613.26	25
f3_dB (main)	Before	NoYes	47.2846.28	10.459.15	25	intensity	Before	NoYes	62.3563.14	7.585.44	25
	After	NoYes	41.9944.51	11.6011.39	25		After	NoYes	61.8962.89	7.056.94	25
HNR	Before	NoYes	16.1916.99	5.363.83	25	sd_int	Before	NoYes	0.9881.290	0.4691.057	25
	After	NoYes	17.8217.27	3.153.09	25		After	NoYes	0.9400.895	0.3020.338	25

B1, 1st formant’s bandwidth; B2, 2nd formant’s bandwidth; B3, 3rd formant’s bandwidth; f1_dB, 1st formant’s energy; f2_dB, 2nd formant’s energy; f3_dB, 3rd formant’s energy; HNR, harmonics to noise ratio; NHR, noise to harmonic ratio; jit_local, jitter local; shim_local, shimmer local; f0, fundamental frequency; Q-tone, quarter tone; sd_int, standard deviation of intensity.