Array Receivers and Sound Sources for Three-Dimensional Shallow-Water Acoustic Field Experiments
Abstract
Funds to upgrade acoustic instruments and purchase oceanographic sensors are requested to improve our fieldwork capabilities for regional ocean acoustic studies. The ultimate goal is to enhance the quality of the three-dimensional (3-D) underwater acoustics research currently funded by the Ocean Acoustics Program at the Office of Naval Research (ONR). After the upgrades, these instruments will be utilized to support future ONR acoustics experiments, especially the two experiments that are planned in the Arctic Ocean and the New England Shelf in 2016. The scientific objectives of these two studies are to understand the effects of changing Arctic conditions (e.g., reduced ice extent) on underwater sound propagation and ambient noise, and to investigate the acoustical physics and effects of fine-grained sediment. Both of the experiments will be conducted in temporally and spatially varying environments with dynamic sea surface conditions due to the presence of ice and waves, water-column fluctuations caused by oceanographic processes and bathymetric and sub-bottom variability. Underwater sound in such environments will have strong variability over short spatial scales on the order of kilometers with variable time-space sound field structures; thus, it requires multiple receivers for sound field measurements. Also, to implement the one-year deployment plan in the Arctic experiment, fabrication of electronic packages to allow longer deployment of our efficient resonator sound sources is proposed. These resonators will complement other sources planned in the Arctic experiment to study 3-D acoustic effects on the shelf and shelfbreak. They can also be used in the seabed characterization experiment on the New England Shelf to distinguish the seabed effects by measuring the temporal variability of sound field caused by a variety of oceanographic processes in the area.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Aug 12, 2016
- Source ID
- N000141512893
Entities
People
- Ying-Tsong Lin
Organizations
- Office of Naval Research
- United States Navy
- Woods Hole Oceanographic Institution