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2. Electrosmart - Wikipedia

   en.wikipedia.org/wiki/Electrosmart

   Electrosmart is an Android application which measures the radio-frequency electromagnetic waves emitting from various sources like mobile phones (cellular networks i.e., 2G, 3G, 4G, 5G), WiFi access points, Bluetooth devices, etc. [2] The app uses the antenna of mobile phones to calculate the pollution of waves and order them according to the power of that particular source.

3. EMF measurement - Wikipedia

   en.wikipedia.org/wiki/EMF_measurement

   An EMF meter is a scientific instrument for measuring electromagnetic fields (abbreviated as EMF). Most meters measure the electromagnetic radiation flux density (DC fields) or the change in an electromagnetic field over time (AC fields), essentially the same as a radio antenna, but with quite different detection characteristics.

4. Electromagnetic compatibility - Wikipedia

   en.wikipedia.org/wiki/Electromagnetic_compatibility

   These incorporate bandwidths and detectors as specified by international EMC standards. An EMI receiver may be based on a spectrum analyser to measure the emission levels of the DUT across a wide band of frequencies (frequency domain), or on a tunable narrower-band device which is swept through the desired frequency range.

5. Electromagnetic shielding - Wikipedia

   en.wikipedia.org/wiki/Electromagnetic_shielding

   In electrical engineering, electromagnetic shielding is the practice of reducing or redirecting the electromagnetic field (EMF) in a space with barriers made of conductive or magnetic materials. It is typically applied to enclosures, for isolating electrical devices from their surroundings, and to cables to isolate wires from the environment ...

6. Ocean Guardian - Wikipedia

   en.wikipedia.org/wiki/Ocean_Guardian

   Ocean Guardian is the manufacturer of Shark Shield shark repellent devices. The Ocean Guardian electronic devices create an electromagnetic field to deter shark attacks and are used by surfers, scuba divers, snorkelers, spearfishers, ocean kayak fishers, swimming areas off boats and for ocean fishing.

7. Geiger counter - Wikipedia

   en.wikipedia.org/wiki/Geiger_counter

   The sound of a geiger counter. A Geiger counter (/ ˈ ɡ aɪ ɡ ər /, GY-gər; [1] also known as a Geiger–Müller counter or G-M counter) is an electronic instrument used for detecting and measuring ionizing radiation.