High Frequency Acoustics and Soundscapes in Temperate and Arctic Coastal Environments
Abstract
The proposed work focuses on high frequency acoustics and soundscapes in temperate and Arctic coastal environments. The motivation for this work comes from the need for reliable and robust underwater acoustic communications systems networks in the VHF UWCOMMS band, defined here as100 kHz 1 MHz. VHF UWCOMMS have important Navy applications. Wide bandwidths are available, which can be exploited to achieve a combination of high data rates and low SNR performance. The high rate of absorption of VHF-band energy in seawaternaturally limits the range of detectability by hostile assets. Short acoustic wavelengths enable the construction of compact arrays, which facilitates deployment on a wide range of platforms. Notwithstanding its potential advantages, VHF UWCOMMS is not yet a mature technology, and basic research into performance-limiting channel effects and VHF ambient noise are ongoing. The proposed work focuses on 3 aspects of VHF UCSOMMS: I. laboratory and field experiments to study the impact of microbubbles entrained near the sea surface by breaking waves and ship wakes on coherent acoustic communications, II. the development of infrastructure to support laboratory and field studies of high frequency acoustics in shallow water, and III. characterizing and modeling the broad-band underwater soundscape in costal Arctic regions, including the VHF band.This abstract is publicly releasable.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- May 05, 2021
- Source ID
- N000142112316
Entities
People
- Grant B Deane
Organizations
- Office of Naval Research
- United States Navy
- University of California, San Diego