Contact: Laura Ost
laura.ost@nist.gov
303-497-4880
National Institute of Standards and Technology (NIST)

Emergency Links: NIST Identifies 'Sweet Spot' for Radios in Tunnels

Caption: Electronics engineer Dennis Camell (foreground) aligns antennas in an old California silica mine for a NIST study identifying optimal frequencies for radio signal transmissions in tunnels.

Credit: Credit: G. Koepke/NIST

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Related news release: Emergency links: NIST identifies 'sweet spot' for radios in tunnels