In "I Hear America Singing," what does Whitman describe as singing?

In "I Hear America Singing," the poet Walt Whitman describes the ordinary people of America and their daily activities as singing. He indicates that singing also contributes to the creation of the American culture.

Whitman describes the "varied carols" of a mother, a wife and a girl at work, as well as craftsmen such as a carpenter, boatman, woodcutter and mechanic. He notes that each person sings "what belongs to him or her and to none else." Whitman is glorifying the creative nature of labor and its effects on the consciousness of a nation, as well as the merits of personal achievement and individualism. The poem was published in his notable collection titled, "Leaves of Grass."