Applicability of Speech Bandwidth Compression Techniques in Mine Electromagnetic Communications.
NTIS: PB/226-781 Available for Reference At Bureau Libraries :21 pages
This report deals with the feasibility of the use of vocoders as an integral part of a mine electromagnetic voice communication system. Limitations imposed by the nature of the transmission path, background noise, and equipment are examined. Some properties of vocoders and apparent advantages of the use of vocoders in a mine communications are discussed. The conclusion is reached that the manmade noise level will ultimately determine the workability of such a system.
NTIS Accession No.
NTIS: PB/226-781; Available for Reference At Bureau Libraries