High Noise Cable as a Sensing Element
H. T. Meryman, Hampton W. Shirer · Review of Scientific Instruments · 1954
The problem of devising a sensing element of the ``burglar alarm'' type which would be highly sensitive, portable, battery operated, and adaptable to any type of terrain was solved by using a shielded cable of high noise characteristics as an extended transducer. By this means, a device of extreme simplicity was developed with sensitivity sufficient to detect almost indiscernible physical deflection.