Phil-Ho Lee

TL;DR: Two neural network approaches are applied for the detection of a tonal signal by peak extraction, and the classification of the tonal signals by pattern recognition in some numerical experiments on a simulation signal and ship-radiated noise obtained from a real ship.

TL;DR: In this article, the authors measured in a shallow sea with tidal current for reducing the flow-induced low-frequency ambient noise, and the results showed that the attenuation of acoustic energy caused by the screen, estimated based on the measurements of ship noise in situ and hydrophone sensitivity in a water tank, is considered to be less than 1 dB at 2-10 kHz band when the thickness of the foam is less than 3 cm.

TL;DR: This paper considered the direct-sequence spread-spectrum system with binary phase shift keying (BPSK) modulation generally adopted for range estimation in the deep sea and discusses the three different simulation results of range estimations from peak detection with cross-correlation.

TL;DR: In this paper, the short-range broadband propagation loss in very shallow water is characterized by sea experiment, and interpretations of the results of sea experiment by the analytical and numerical techniques reveal that the contributions of continuous modes are important in low-frequency regimes.