Distributedacoustic sensing (DAS) is a form of electromagnetic detection used to detectirregularities in acoustic fields. The detection of such irregularities allowsfor improved control over the installation of equipment and apparatus.Distributed acoustic sensing is widely used in many fields, most notably todetect and evaluate vehicle noise sources. They are also used in conjunctionwith other types of acoustic monitoring devices such as phase modifiers andphase lock compressors. Some of the applications of distributed sensors andmonitors are described below.
Theinstallation of distributed acoustic sensing is important to reduce unwantedreflections from installed equipment. The main advantage of distributedacoustic monitoring systems is their capability to capture the entire signalrange. This enables acoustic sensors to provide measurements of the entireambient noise range, rather than just a small portion of it. For instance,distributed acoustic sensing may be used in industrial plants to reduce thelevel of noise created by machinery or other sources of amplified sound.
Distributedacoustic sensing can also helpin preventing false alarms caused by machinery or other airborne sources. Whenmultiple sources of amplified sound are being measured, false alarm signals canbe reduced. Another benefit of distributed acoustic sensors is their ability toprovide data quickly. Modern distributed acoustic sensors can capture data athigh speeds of about 10 frames per second.
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