Specification for underground loudspeaker communication systems in coal mines. (29th April 1983)

• Record Type: Book
• Authors: British Standards Institution,
• Publisher Details: London : British Standards Institution
• Publication Date: 1983
• Extent: 1 online resource (12 pages)
• Subjects: 602.1841; Communication networks; Circuits; Voltage; Loudspeakers; Coal mining; Electrical safety; Output impedance; Safety devices; Mines; Telephone systems; Network parameters; Signal level; Mining equipment; Input impedance; Overvoltage protection; Audio systems; Overcurrent protection; Underground; Audio equipment; Electrical protection equipment; Speech transmission systems; Communication cables; Electric cables; Communication equipment; Acoustic couplers
• Languages: English
• Related ISBNs: 0580119394
• ISSNs: 0037-3432
• Access Rights: Legal Deposit; Only available on premises controlled by the deposit library and to one user at any one time; The Legal Deposit Libraries (Non-Print Works) Regulations (UK).
• Access Usage: Restricted: Printing from this resource is governed by The Legal Deposit Libraries (Non-Print Works) Regulations (UK) and UK copyright law currently in force.