Stamping is a process that involves placing flat sheet metal, either in a blank or coil shape, into a stamping press. A tool and die surface then shapes the metal into a new form. Stamping includes several sheet-metal forming methods, such as punching with a machine press, blanking, embossing, bending, flanging, and coining.
In finance, a hollow log is a fund or account that is sometimes kept secret using special ways to record money. It is used to store assets safely for later use. The term can describe actions that are either legal or illegal, depending on the situation.
The Hornbostel–Sachs system for classifying musical instruments defines idiophones as instruments that make sound mainly by the instrument itself vibrating. These instruments do not use membranes or strings to create sound.
The Roneat Ek or Roneat Aek (Khmer: រនាតឯក; also called Roneat Rut) is a xylophone used in Khmer classical music from Cambodia. It is shaped like a curved rectangle. The instrument has twenty-one thick bamboo or hard wood bars that hang from strings connected to the two sides.
A lithophone is a musical instrument made from rock or pieces of rock that are struck to create musical notes. Notes can be played together to create harmony or one after another to make a melody. It is a type of instrument that produces sound when struck, similar to instruments like the glockenspiel, vibraphone, xylophone, and marimba.
• Abrasion (medical): a type of injury that occurs when the skin rubs against a rough surface, causing a scrape or scratch. • Scraper (biology): a water-dwelling animal that eats algae, tiny organisms, and other materials by scraping them from rocks and other surfaces. • Scrape: a shallow, soil-free area in the ground where some birds build their nests.
A rainstick is a long, hollow tube made from bamboo or dried cactus. It is partially filled with small pebbles, rice, dried beans, or other hard granular materials. The inside surface of the tube has small pins or thorns arranged in a spiral pattern.
The bullroarer, rhombus, or turndun is an ancient musical instrument used in rituals and for sending messages over long distances. It is made of a piece of wood tied to a string. When the string is swung in a large circle, the wood creates a loud, vibrating sound that resembles a roar.
Thundersticks, also called bambams, are long and narrow plastic balloons used as promotional noise makers. When two thundersticks are hit together, they make a loud noise. They are commonly used at sports events.
A friction drum is a musical instrument that can be found in many different forms across Africa, Asia, Europe, and South America. In Europe, this instrument appeared in the 16th century and was used for certain religious and ceremonial events.