Shielded

Shielded is an adjective meaning protected by a shield or shielding material. In everyday language it describes something rendered resistant to damage, interference, or external influence by a barrier or protective layer. The term is widely used across science and engineering to denote protection achieved through physical barriers or materials.

In radiation and particle physics, shielding refers to materials that absorb or attenuate radiation to reduce exposure. Effectiveness depends on material properties, thickness, and radiation type. Lead is commonly used for X-rays and gamma rays, while concrete or water may be used for neutrons. Shielding is essential in medical facilities, nuclear plants, and research laboratories.

In electronics and communications, shielded cables and enclosures employ a metallic shield to prevent electromagnetic interference and crosstalk. The shield is usually grounded, and common materials include copper or aluminum foil and braid. Shielding helps maintain signal integrity in noisy environments.

In welding, shielded metal arc welding uses a flux-coated electrode to generate a shielding gas and slag that protect the molten weld from the atmosphere, improving weld quality.

Other contexts describe protective barriers in architecture, safety, and health, such as shielded rooms for radiation sources or protective shielding around sensitive equipment. The concept centers on reducing exposure by inserting barriers or materials between the source and what is protected.