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- Equipment, tools, and parts:
- Through-the-earth communications systems
- Document types:
- Contracts and cooperative agreements
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Results 11 - 13 of 13
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9/18/2012 - Contracts and cooperative agreementsA contract to design a prototype two-way, through-the-earth (TTE) emergency communication system, fabricate the hardware, and test the system at an underground coal mine.
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9/18/2012 - Contracts and cooperative agreementsA contract to analyze, adapt, and test an existing ultra-low frequency (ULF), through-the-earth system for communication and tracking of underground mine personnel.
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9/17/2012 - Contracts and cooperative agreementsA contract to design, build, and demonstrate a battery-powered, through-the-earth wireless voice communication system for overburdens of up to 600 feet.
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Content source: National Institute for Occupational Safety and Health, Mining Program