👉 Shielded is a term used in electronics and telecommunications engineering. It refers to an electronic device or circuit that has been treated with a layer of insulating material, such as metal or plastic, to prevent potential electromagnetic interference (EMI) from entering its circuits. This can help protect the device from damage caused by external sources, such as radio frequency fields (RFIs), and also reduce the likelihood of interference between different electronic components in the same circuit. Shielded devices are commonly used in wired and