To test for radiated EMI, use test instruments like pocket AM radios, radio-frequency field-strength meters, spectrum analyzers and specialized antennas — the broadband type works well.

There are three different methods to help reduce EMI: filtering, grounding and shielding. A direct way to get rid of unwanted signals is through filtering them out and in this instance, passive filters work well, and they’re used in most new equipment to minimise EMI.

Conducted electromagnetic interference is caused by the physical contact of the conductors as opposed to radiated EMI, which is caused by induction (without physical contact of the conductors). This persists in all conductors and mutual inductance between two radiated electromagnetic fields will result in EMI.

Electromagnetic compatibility, or EMC means that a device is compatible with (i.e., no interference is caused by) its electromagnetic (EM) environment and it does not emit levels of EM energy that cause electromagnetic interference (EMI) in other devices in the vicinity.

Electromagnetic compatibility (EMC) testing measures the ability of equipment or systems to function satisfactorily in their electromagnetic environment without introducing intolerable electromagnetic disturbance to anything in that environment.

A change of aerial height may also reduce the effect. A higher performance aerial can help lessen interference caused by nearby radio transmitters. If you have an aerial amplifier, use the lowest gain amplifier needed, to avoid possible system overload caused by the nearby transmitter.

If you only hear the static when listening to the radio, and not when listening to CDs or any auxiliary audio sources, then the problem is either with the antenna, the tuner, or some external source of interference. Unplug the radio antenna and check if the sound is still there.

Three key ways to prevent RFI attacks are:

1. Never use arbitrary input data in a literal file include request.
2. Use a filter to thoroughly scrub input parameters against possible file inclusions.
3. Build a dynamic whitelist.

Although it is not magic of course but a logically explainable effect of radio waves. When your devices use WiFi to connect to Internet the signals are sent with radio waves and despite of all advanced features wireless interference can happen. As a result your wireless connection may become weak and unreliable.

Addressing Wi-Fi interference can include better placement of access points, balancing traffic between the 2.4 GHz and 5 GHz bands, beamforming, and eliminating other sources of radio-frequency signals.