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BS 6353:1983 – Specification for underground loudspeaker communication systems in coal mines

Available as PDF document for immediate download, or as printed publication – yes

Number of pages – 8 pages, A4

Manufacturer – BSI

Price – GBP 30

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Keywords – Loudspeakers, Audio equipment, Underground, Telephone systems, Mines, Coal mining, Audio systems, Mining equipment, Communication equipment, Communication networks, Acoustic couplers, Safety devices, Electrical safety, Electrical protection equipment, Overcurrent protection, Overvoltage protection, Electric cables, Communication cables, Circuits, Input impedance, Output impedance, Network parameters, Voltage, Signal level, Speech transmission systems