A "bong" is a type of water pipe used for smoking substances like tobacco or cannabis. It typically consists of a bowl for the substance, a downstem that extends into a water chamber, and a mouthpiece at the top. When the user inhales, smoke is drawn through the water, which cools and filters it before reaching the lungs. The sound produced when using a bong is often described as a deep, resonant "bong" or "bubbling" noise. This sound occurs as the smoke passes through the water, creating bubbles and vibrations. The unique acoustics can enhance the smoking experience for some users.