title: Intensity fluctuations of midfrequency sound signals passing through moving nonlinear internal waves.
abstract: 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 (approximately 4 and approximately 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.
authors.forename: Boris
authors.initials: B
authors.lastname: Katsnelson
authors.forename: Valery
authors.initials: V
authors.lastname: Grigorev
authors.forename: James F
authors.initials: JF
authors.lastname: Lynch
mesh_terms: D000162:Acoustics; D019015:Geologic Sediments; D008962:Models, Theoretical; D009038:Motion; D017711:Nonlinear Dynamics; D009792:Oceans and Seas; D011825:Radar; D012815:Signal Processing, Computer-Assisted; D013016:Sound; D013018:Sound Spectrography; D013696:Temperature; D013997:Time Factors