Singing bowls (also known as Tibetan Singing Bowls, rin gongs, Himalayan bowls orsuzu gongs) are a type of bell, specifically classified as a standing bell. Rather than hanging inverted or attached to a handle, singing bowls sit with the bottom surface resting, and the rim of singing bowls vibrates to produce sound characterized by a fundamental frequency (first harmonic) and usually two audible harmonic overtones (second and third harmonic). Singing bowls are used worldwide for meditation, music, relaxation, and personal well-being. Singing bowls were historically made throughout Asia, especially Nepal, China and Japan. They are closely related to decorative bells made along the silk road from the Near East to Western Asia. Today they are made in Nepal, India, Japan, China and Korea. Singing bowls are played by striking the rim of the bowl with a padded mallet. They can also be played by the friction of rubbing a wood, plastic, or leather wrapped mallet around the rim of the bowl to emphasize the harmonic overtones and a continuous 'singing' sound. Both antique and new bowls are widely used as an aid to meditation. They are also used in yoga, music therapy, sound healing, religious services, performance and for personal enjoyment.