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.
Let us consider the death of a person, determined by the effect of marginotomy, as a timely catastrophe; and the sudden death or disability as premature. It is obvious that, using such criteria, the diagnostic value of telemedicine becomes non-zero only in case of the prevention of a premature catastrophe.