ABSTRACT

Before any sound reinforcement facility is put into operation, it should be tested for electrical and acoustical functionality. This test should confirm that the system is ready for operation, and that no disturbances attributable to electrical defects, poor calibration or incorrect travel time or timbre adjustments are occurring. Moreover, the acoustical calibration has to supply the reference values for adjustments that may be needed during operation, such as maximum amplification, adaptation of the loudspeakers to the room-acoustical conditions, realization of maximum intelligibility (or spaciousness if so required by the system), and sufficient uniformity of sound level distribution.