Ambient Noise Characterization using Lagrangian Platforms (ANOCLAP)
Abstract
The general objective of this proposal is to characterize acoustic ambient noise and sound speed in the upper ocean using new method ology based on autonomous freely-drifting (Lagrangian) instruments, with particular focus on the complex and rapidly changing ice-fr ee sub-arctic regions (e.g., the Nordic Seas).Acoustic sensors (single hydrophones and directional compact arrays) will be fitted to surface drifters and profiling floats. Electronics and software will be developed to process the acoustic data on board and to tran smit reduced data (anomalous signals and statistical information on ambient noise) in real time via satellite.Prototype acoustic dri fters and floats will be tested at sea in local waters off La Spezia. After some eventual improvements, several drifters and floats will be constructed. They will be deployed in the Nordic Seas during a NORSE cruise, amongst many other assets of collaborators.The collected oceanographic (profiles of temperature, salinity and sound speed;currents) and acoustic (ambient noise) data will be analy zed to study the spatial and temporal variability of the local dynamics and acoustics in the Nordic Seas, in particular to quantitat ively characterize the 3D soundscape in the upper ocean at mesoscale and sub-mesoscale.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Oct 22, 2021
- Source ID
- N000142112744
Entities
People
- Pierre-Marie Poulain
Organizations
- Centre for Maritime Research and Experimentation
- Office of Naval Research
- United States Navy