Shielding is crucial for all manner of electronic devices. Whether you want to keep power supply noise out of an audio amplifier, or protect ICBMs against an electromagnetic pulse from a nuclear ...

Say you wanted to protect your Wi-Fi network from surrounding buildings. The most obvious way to do this would be to secure the devices on your network using the wireless security protocol of choice.

A shielded enclosure used to block electromagnetic fields from reaching its interior. However, a compass does work inside a Faraday cage because the cage does not block the earth's magnetic field.