Publications

Performance Characteristics of the NoiseSpotter: An Acoustic Monitoring and Localization System

By Kaustubha Raghukumar, Ph.D., Senior Consultant

Grace Chang, Ph.D., Senior Science Advisor, Technical Director, Marine Sciences and Engineering

Frank W. Spada, Project Scientist

Craig A. Jones, Ph.D., Managing Principal, Business Director, Marine, Coastal, Climate, and Technology Services

Abstract

In support of monitoring technologies to evaluate the potential environmental effects of offshore energy devices, this project attempts to ultimately improve upon traditional acoustic sensing techniques by developing a cost-effective compact array of acoustic vector sensors that characterizes, classifies, and provides accurate location information for anthropogenic and natural sounds. The NoiseSpotter consists of three acoustic vector sensors arranged in a three-dimensional array deployed as a seafloor mooring. Each vector sensor measures acoustic pressure and the three-dimensional particle velocity vector associated with the propagation of an acoustic wave, thereby inherently providing bearing information to an underwater source of sound. Here, performance characteristics of the NoiseSpotter are presented, along with an analysis of its abilities as an operational passive acoustic monitoring system to characterize sources of sound. Data are presented from controlled acoustic transmissions in a quiet environment and an energetic tidal channel in the presence of non-acoustic flow noise. NoiseSpotter performance is demonstrated through its modular design, ease of deployment/recovery, ability to remove signal contamination by flow noise and the ability to geolocate acoustic sources of interest.

Paper presented at the Offshore Technology Conference, Houston, Texas, May 2019.

Paper Number: OTC-29425-MS

https://doi.org/10.4043/29425-MS

Published: April 26 2019

This paper was co-authored by Kaustubha Raghukumar; Grace Chang; Frank W. Spada; Craig A. Jones

Published

July 1, 2024

About The Author

Dr. Kaustubha Raghukumar is an oceanographer with a solid background in physical oceanography, ocean acoustics, and wave propagation physics, and... Full bio

About The Author

Dr. Grace Chang has more than 25 years of experience in the fields of limnology and oceanography. Dr. Chang has... Full bio

About The Author

Mr. Frank Spada is a proven developmental engineer and ocean engineering technician. He has 24 years of experience in the... Full bio

About The Author

Dr. Craig Jones serves as the managing principal for Integral’s Marine, Coastal, Climate, and Technology Services. With more than two... Full bio