Hums are low, continuous sounds produced by vibrating objects or air. They can occur naturally, such as the hum of a bee or the sound of wind through trees, or artificially, like the hum of electrical appliances. Hums are often characterized by their steady pitch and can be soothing or annoying, depending on the context. In music, a hum can refer to a vocalization without words, often used to create melody or harmony. This technique is common in various genres, including jazz and folk music. Humming can also serve as a form of self-soothing or relaxation for many individuals.