The fluctuations of intensity of broadband pulses in the midfrequency range (2-4.5 kHz) propagating in shallow water in the presence of intense internal waves moving approximately along the acoustic track are considered. These pulses were received by two separate single hydrophones placed at different distances from the source (∼4 and ∼12 km) and in different directions. It is shown that the frequency spectra of the fluctuations for these hydrophones have different predominating frequencies corresponding with the directions of the acoustic track. Comparisons of experimental results with theoretical estimates demonstrate good consistency.
Bibliographical noteFunding Information:
The authors are very grateful to D. J. Tang for the information about the radiated signals and helpful discussions. This work was supported by the Office of Naval Research (ONR), the Russian Foundation for Basic Research (RFBR), Grant No. 06-05-64853, and CRDF (REC 010).
ASJC Scopus subject areas
- Arts and Humanities (miscellaneous)
- Acoustics and Ultrasonics