scrambler

6-06 — elektor june 1981 scrambles Speech consists of an ever changing, highly complex acoustic waveform. A multitude of factors are involved which we are unable to go into here, but the point is that even minor interference will affect speech intelligibility. Scramblers are of course nothing new (007 has been using one for years!). They were extensively used by the military and other agencies during wartime before the advent of sophis- ticated codes made them somewhat obselete. Early systems were designed with the discrete components available at the time with rather complicated resu Its. scrambler your own personal "hot line" The scrambler described here literally inverts the speech frequency spectrum. Thus, high frequencies are translated into low frequencies and vice versa. The result is totally unintelligible. The scrambler is shown in the form of a block diagram in figure 1. Since it was designed to distort speech it will only operate within the frequency range of the huma...