In American tradition, for instance, listeners may join in singing the refrain of a song, or a whole group may sing work songs, game songs, or party songs together--usually in unison rather than in harmony.

• 譬如在美国传统里，听众会参与一起唱副歌，或大家一起唱劳动歌、游戏歌及聚会歌，通常用同声而不讲究和声。