جستجوی مقالات مرتبط با کلیدواژه « acoustic wave » در نشریات گروه « مهندسی دریا »

Acoustic wave propagates properly in water، whilst most forms of electromagnetic waves، particularly in salty and dense sea water، are attenuated after a few tens or hundreds of meters so that it will be impossible to trace and detect them. This paper presents a special method for recognizing probable underwater currents، and reconstruction of their intensities، widths، and directions by using the acoustic waves. The method relies on the differences in travel times of sound in the locations where the water density varies from one place to another. The design is based on the «rotating sound source-receiver» system. This technique is somehow similar to the customary methods of image reconstruction in diagnostic tomography. A computer program was written in Visual C in the Windows media. The efficiency and accuracy of the program was consequently evaluated by simulating an ocean tomographic region and its postulated currents.