Reference · Secure facilities & shielding
EMI shielding
Electromagnetic-interference shielding
EMI shielding blocks or attenuates electromagnetic fields to stop interference between systems, or to keep signals from leaking out of a space. It spans component-level shielding up to fully shielded rooms, and is measured as shielding effectiveness in decibels.
What it is
Conductive or magnetic barriers — enclosures, gaskets, filters, and coatings — that reduce the coupling of electromagnetic energy into or out of equipment or a space. It addresses both radiated and conducted interference.
Why it exists
Electromagnetic interference can corrupt data, degrade sensitive instruments, or leak information. Shielding keeps systems working correctly and keeps signals contained.
Who it applies to
Contractors building secure facilities, test and measurement chambers, medical imaging suites, and any environment where electromagnetic cleanliness or containment is a requirement.
Frequently asked
What is EMI shielding used for?
EMI shielding is used to stop electromagnetic interference — either to protect sensitive equipment and measurements from outside fields, or to keep a system's own emissions from escaping. It ranges from small component shields up to fully shielded rooms.
Related terms
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