Tibetan Singing Bowl
A Tibetan bowl, generally made from a bronze alloy containing copper, tin, zinc, iron, silver, gold, and nickel, is a type of standing bell played by striking or rubbing its rim with a wooden or leather-wrapped mallet. This excitation causes the sides and rim of the bowl to vibrate, producing a rich sound.
The unique singing properties of Tibetan bowls were utilised as a way of investigating a liquid’s interaction with solid materials — a situation that arises in many engineering applications such as the wind-loading of bridges and buildings.
When a fluid-filled Tibetan bowl is rubbed, the slight changes in the bowl’s shape disturb the surface at the water’s edge, generating waves. Moreover, when these changes are sufficiently large, the waves break, leading to the ejection of droplets.
The new findings could benefit processes such as fuel injectors and perfume sprays where droplet generation plays an important role.
The high-speed videos allowed the researchers, from Université de Liège and the Massachusetts Institute of Technology, to quantify how the droplets were formed, ejected, accelerated, and bounced on the surface of the fluid.
A similar phenomenon exists when rubbing the edge of a wine glass, which inspired the design of the glass harmonica by Benjamin Franklin. However, the Tibetan singing bowl is easier to excite than the wine glass, since its resonant frequency is much smaller. Read more
The sound of Tibetan singing bowls harmonizes and allows for deep relaxation of both sides of the brain. It stimulates stress relief on all levels and the elimination of toxins from the body. After sound therapy emotions are calm and the mind clearer, and the sound vibrations have effect on the body after the singing bowls have been played on it.