A high-frequency, shallow-water acoustic measurement system

High-Frequency Acoustic Sediment Classification in Shallow Water

A geoacoustic inversion technique for high-frequency (12 kHz) multibeam sonar data is presented as a means to classify the seafloor sediment in shallow water (40–300 m). The inversion makes use of backscattered data at a variety of grazing angles to estimate mean grain size. The need for sediment type and the large amounts of multibeam data being collected with the Naval Oceanographic Office’s ...

Towards a Multiple Station High Frequency Shallow Water Acoustic Tomography System

Acoustic Tomography System, " a thesis by Justin Michael Eickmeier. Abstract Title: Acoustic tomography studies have traditionally been conducted in deep water, implementing high power, low frequency pulses transmitted over long distances to map large scale current events. Conducting acoustic tomography in a shallow water environment using high frequency low power pulses represents both unique ...

Shallow Water Acoustic Impulse Response Measurement

LONG-TERM GOALS Goals for this project include: 1) the characterization of ocean acoustic impulse response (OAIR) in shallow water under various environmental conditions, 2) the development of predictive and synoptic methodologies/models linking acoustic communications system (modem) performance to environmental factors. Ultimately this information can be used to develop a robust acoustic modem...

A high-frequency warm shallow water acoustic communications channel model and measurements.

Underwater acoustic communication is a core enabling technology with applications in ocean monitoring using remote sensors and autonomous underwater vehicles. One of the more challenging underwater acoustic communication channels is the medium-range very shallow warm-water channel, common in tropical coastal regions. This channel exhibits two key features-extensive time-varying multipath and hi...

Low Frequency Acoustic Intensity Propagation Modeling in Shallow Water Waveguides