ABSTRACT
In many experiments of practical interest such as jet acoustics, a large quantity of data has to be measured within a very short period of time. For such measurements, a data acquisition and processing system for continuous and automatic acquisition of data becomes essential. The essential element in a modern data acquisition system is the instrument transducer, which furnishes an electrical signal that is indicative of the physical quantity being measured. The digital data, after conversion from analogue to digital, is usually stored in floppies/winchester drive in the personal computer-based data acquisition systems and in magnetic tapes in the conventional data acquisition units. The central processing unit is a single large-scale semiconductor integrated circuit chip and is termed the microprocessor. Communication between instruments is possible without needing all the messages/data to be routed through a control unit.
