Affiliation:
1. State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China
Abstract
The frequency-range interference patterns of the acoustic field in the shadow zone of deep water correlate with the source location. However, extraction of such interference structure requires a broadband source and fails for narrowband signals. In this work, the narrowband depth-time interference patterns of the acoustic field from a moving source are investigated. Two types of time intervals in the observed patterns are derived based on the ray theory. These time intervals are correlated with the multipath arrival angles, which in turn imply the source range. The simulations and the experimental results demonstrate stable range estimations using the interference patterns.
Funder
Youth Innovation Promotion Association, Chinese Academy of Sciences
Publisher
Acoustical Society of America (ASA)
Subject
Electrical and Electronic Engineering,Atomic and Molecular Physics, and Optics