표 4. | Table 4. 세 집단 간 표준중국어 마찰음 /sai/와 /ɕia/에 대한 주파수 무게중심 평균과 표준편차(단위: Hz) | The Mean COG (Hz) of fricatives /sai/, /ɕia/ in Mandarin Chinese for the three groups
| 집단 | /sai/ | /ɕia/ |
| On | Mid | Off | On | Mid | Off |
| MM | 5,346 (2,697) | 8,125 (1,476) | 7,658 (2,488) | 4,222 (2,031) | 5,540 (1,328) | 4,982 (1,777) |
| BKS | 4,753 (2,172) | 7,712 (1,494) | 6,141 (2,595) | 4,596 (1,751) | 6,671 (1,397) | 5,535 (1,989) |
| AKS | 6,433 (2,210) | 8,397 (1,778) | 6,564 (3,222) | 5,542 (1,687) | 7,107 (1,261) | 6,101 (1,830) |
COG, center of gravity; MM, Mandarin monolingual; BKS, beginning Korean speakers; AKS, advanced Korean speakers.