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By now, as far as I can judge, a paradoxical situation has emerged in the field of sound reproduction. Though there are amplifiers and acoustic systems with very good characteristics and even with moderate prices, there is a considerable number of the consumers not satisfied with the result. All the users can be provisionally split into four groups.

      Modern low-speed speech codecs provide the satisfactory quality of signal transmission up to the speed of about 600 bps. High speech quality is obtained at the speed of more than 1200 bps, speeds of 200 and less are practically not used, because the intelligibility rapidly falls after the values of about 300 bps.

Currently, our obviously underestimated estimates, by means of "Telecard" they give not less than 100 000 telemedicine consultations per year in Russia and Ukraine. Even if we assume that only one of hundreds transmitted electrocardiograms is really vital, and the probability of a correct decision on the provision of emergency assistance is 1/2, then not less than five hundred people a year do not give up the ghost or become disabled as a result of a timely remote diagnosis. Naturally, loss of the state decreases also - according to official data, about 15,000 USD per one person - a total of 15000х500=7.5 million cabbage annually.

Let us suppose that there is an idealized radio locator with the task to detect a target with the RCS approaching very small values. We suppose the noise of the locator receiver unit to be non-changeable non-zero and data accumulation when using multiple location is not permissible. We also think that the size of the target shining point is negligibly small compared to the “pencil” beam spot. The method of detection and selection of the decision making threshold are considered close to the theoretical optimum.