Singing bowls, also called sound bowls, are carefully crafted bowls that, when struck on the rim or side, produce sound. Each bowl has a song of its own, with smaller bowls emitting a delicate, often higher pitched sound, while large bowls seem to hum a deep, full-bodied song. Singing bowls have a long, rich history in religious, spiritual, meditative, and healing settings. In many Buddhist traditions, for example, singing bowls are often used to signal the beginning and conclusion of silent meditations, with the sound acting as a bridge between the conscious and unconscious realms. Singing Bowls is a subcategory under the Frequency Healing modality.