School

13 s

School

16 s

School Bell

8 s

Korean school bell

18 s

School Bell

9 s

School Bell

11 s

School Bell

8 s

Japanese school bell

22 s

School bell

13 s

Bell

10 s

School Bell

14 s

school bell

10 s

Schoolgong

12 s

School Bell

12 s

School Bell

9 s