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JASCO Applied Sciences is a group of international companies that provides services and manufactures equipment to measure underwater sound. JASCO provides services on projects worldwide, operating out of 8 locations internationally, to the oil and gas, marine construction, energy, fisheries, and defence sectors. The head office is located in Halifax, NS Canada. JASCO employs acousticians, bioacousticians, physicists, marine mammal scientists, engineers, and project managers. == Services == The firm deploys calibrated sound recorders to measure underwater sound levels. Projects may be long-term, wide-area acoustic monitoring programs〔 〕〔 〕 or short-term measurements of industrial sources or marine vessels. The data collected are then analysed to determine the acoustic signatures of the sound sources, characterize the ambient noise conditions at the measurement site,〔 〕 or detect and identify marine mammal vocalizations.〔 〕〔 〕 JASCO measures underwater anthropogenic noise from many sources, including: * Pile driving * Seismic survey operations * Marine vessels〔 〕 * Construction (offshore) and nearshore) * High-frequency sonar such as side-scan sonar, multibeam sonar, and echosounders〔 〕 The firm also conducts numerical modelling studies to predict the underwater sound field of noise sources, which are often required for environmental impact assessments of industrial projects. The large sound levels produced by activities such as pile driving and seismic surveys can disturb and even injure marine mammals〔(【引用サイトリンク】url=http://www.mmc.gov/reports/workshop/pdf/fullsoundreport.pdf )〕 and fish. The results of underwater acoustic modelling are commonly expressed as safety radii (or exclusion zone radii) that are used by marine mammal observers during operations to ensure animals are not exposed to harmful levels of noise.〔 〕 Results are also provided as contour maps of the sound levels around the noise source. These maps can be used to assess or mitigate the impacts of the noise on marine mammals,〔 〕 fish, and other aquatic wildlife. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「JASCO Applied Sciences」の詳細全文を読む スポンサード リンク
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