Articles tagged with: Nist and Underground

NIST identifies 'sweet spot' for radios in tunnels

As part of a project to improve wireless communications for emergency responders, researchers at the National Institute of Standards and Technology (nist) have confirmed that underground tunnels - generally a difficult setting for radios - can have a frequency "sweet spot" at which signals may travel several times farther than at other frequencies. The finding, which uses extensive new data to confirm models developed in the 1970s, may point to strategies for enhancing rescue communications in subways and mines.  more

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