ABSTRACT
A sound reinforcement system is usually expected to meet some or all of the following requirements [2.2]. It should be able to:
1 improve intelligibility and clarity; 2 extend the dynamic range; 3 improve the acoustic balance between the different parts of a
performance (speech, vocal and instrumental music); 4 ensure an appropriate relationship between the visual and acoustical
localization of original and 'simulation' sources (sound images), particularly if the action and reception areas are large and of complex geometry;
5 help to overcome difficult or complex acoustic environments; 6 include the audience in the performance activity; 7 modify the acoustical parameters of the reproduction room; 8 enhance the realization of spatial sound effects, such as moving sound
sources through the auditorium or space; 9 modify human voices and instrumental sounds electronically, as well as
use electronically produced noises and sounds as a deliberate means of presentation;
10 preproduce and preprogramme parts of the programme to simplify the technical processes.
