登入選單

返回Google圖書搜尋

Bottom Reflectivity Experiments in the Deep Ocean Over Rugged Bottom Terrain

A. Zed Robinson (Jr)

出版	Naval Research Laboratory, Underwater Sound Reference System, 1974
URL	http://books.google.com.hk/books?id=QEJENwAACAAJ&hl=&source=gbs_api

註釋

In bottom-reflectivity experiments conducted in the Atlantic Ocean during September and October 1971, 1/2-lb blocks of TNT were used as the acoustic source. Data were collected from a hydrophone suspended 500 ft off the ocean floor. The experiments were designed so that direct and reflected signals incident on the suspended hydrophone could be separated in time. Recorded data were digitized, and energy spectral densities of the direct and the reflected signals then were computed separately by fast Fourier transform (FFT) techniques and plotted on the same linear scale to show the bottom-reflection effects as a function of frequency. The experimental procedures are critically examined to expose their inadequacies and to provide information to future experimenters. (Author).