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2. 7 Best Metal Detectors of 2023, Reviewed by Experts - AOL

   www.aol.com/7-best-metal-detectors-2023...

   The best metal detectors have a range of frequencies to detect different metals in different locations for a chance for find lost rings, old coins and gold 7 Best Metal Detectors of 2023, Reviewed ...

3. Unearth Your Next Hobby With These Expert-Recommended Metal ...

   www.aol.com/best-metal-detectors-uncover-buried...

   Scavenge for gold, coins, and other buried treasure with these metal detectors, including models from Garrett, Nokta, and Minelab. Unearth Your Next Hobby With These Expert-Recommended Metal Detectors

4. Metal detector - Wikipedia

   en.wikipedia.org/wiki/Metal_detector

   A metal detector is an instrument that detects the nearby presence of metal. Metal detectors are useful for finding metal objects on the surface, underground, and under water. A metal detector consists of a control box, an adjustable shaft, and a variable-shaped pickup coil. When the coil nears metal, the control box signals its presence with a ...

5. Officially, the 8 Best Headphones Money Can Buy - AOL

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   The high-spec headphones are made for real audiophiles, but at a competitive price point—$150 less than the AirPods Max—you get a pair of headphones more luxurious than anything else on the ...

6. Full body scanner - Wikipedia

   en.wikipedia.org/wiki/Full_body_scanner

   A full-body scanner is a device that detects objects on or inside a person's body for security screening purposes, without physically removing clothes or making physical contact. Unlike metal detectors, full-body scanners can detect non-metal objects, which became an increasing concern after various airliner bombing attempts in the 2000s.

7. Magnetic anomaly detector - Wikipedia

   en.wikipedia.org/wiki/Magnetic_anomaly_detector

   The magnetic anomaly from a submarine is usually very small. One source estimates that it is only about 0.2 nT at a distance of 600 m. Another source estimates that a 100 m long and 10 m wide submarine would produce a magnetic flux of 13.33 nT at 500 m, 1.65 nT at 1 km and 0.01 nT at 5 km. To reduce interference from electrical equipment or metal in the fuselage of the aircraft, the MAD sensor ...