Development of a versatile platform for long-term underwater acoustic monitoring

2012 ◽  
Author(s):  
Paul Barker ◽  
Paul A. Lepper
Keyword(s):  
Acoustic Monitoring ◽  
Underwater Acoustic

scholarly journals Autonomous Deployment of Underwater Acoustic Monitoring Devices Using an Unmanned Aerial Vehicle: The Flying Hydrophone

Sensors ◽  
2020 ◽  
Vol 20 (21) ◽  
pp. 6064
Author(s):  
Daniel Babatunde ◽  
Simon Pomeroy ◽  
Paul Lepper ◽  
Ben Clark ◽  
Rebecca Walker
Keyword(s):  
Autonomous Navigation ◽  
Marine Mammals ◽  
Fourier Transforms ◽  
Low Cost ◽  
Acoustic Monitoring ◽  
Automatic Data ◽  
Underwater Acoustic ◽  
Planning And Control ◽  
The United Kingdom ◽  
And Control

Unmanned aerial vehicles (UAV) are increasingly becoming a popular tool in the observation and study of marine mammals. However, the potential capabilities of these vehicles regarding autonomous operations are not being fully exploited for passive underwater acoustic monitoring in marine mammal research. This article presents results from the development of a UAV system equipped with an underwater acoustic recorder aimed at assisting with the monitoring of harbour porpoises in Special Areas of Conservation in the United Kingdom. The UAV is capable of autonomous navigation, persistent landing, take-off and automatic data acquisition at specified waypoints. The system architecture that enables autonomous UAV flight including waypoint planning and control is described. A bespoke lightweight underwater acoustic recorder (named the PorpDAQ) capable of transmitting the results of fast Fourier transforms (FFT) applied to incoming signals from a hydrophone was also designed. The system’s operation is successfully validated with a combination of outdoor experiments and indoor simulations demonstrating different UAVs capable of autonomously navigating and landing at specific waypoints while recording data in an indoor tank. Results from the recorder suggest that lightweight, relatively low-cost systems can be used in place of heavier more expensive alternatives.

A Rotary Sonar for Long-Term Acoustic Monitoring of Deep-Sea Gas Emissions

2019 ◽  
Author(s):  
Yann Marcon ◽  
Eberhard Kopiske ◽  
Tom Leymann ◽  
Ulli Spiesecke ◽  
Vincent Vittori ◽  
...  
Keyword(s):  
Deep Sea ◽  
Acoustic Monitoring ◽  
Gas Emissions

Long-term passive acoustic monitoring of nearshore ecosystems in the Northwestern Hawaiian Islands

2011 ◽  
Vol 130 (4) ◽  
pp. 2536-2536
Author(s):  
Marc O. Lammers ◽  
Lisa Munger ◽  
Pollyanna Fisher Pool ◽  
Kevin Wong ◽  
Whitlow W. L. Au ◽  
...  
Keyword(s):  
Hawaiian Islands ◽  
Acoustic Monitoring ◽  
Passive Acoustic Monitoring ◽  
Nearshore Ecosystems ◽  
Northwestern Hawaiian Islands ◽  
Passive Acoustic

Insights into airplane overflight effects on bioacoustic activity levels from long-term acoustic monitoring

2016 ◽  
Vol 139 (4) ◽  
pp. 2090-2090
Author(s):  
Susan Parks ◽  
Samuel L. Denes ◽  
Leanna P. Matthews ◽  
Pramod K. Varshney ◽  
Kurt M. Fristrup
Keyword(s):  
Acoustic Monitoring ◽  
Activity Levels

scholarly journals Operando Acoustic Monitoring of SEI Formation and Long-Term Cycling in NMC/SiGr Composite Pouch Cells

2020 ◽  
Vol 167 (2) ◽  
pp. 020517 ◽  
Author(s):  
Clement Bommier ◽  
Wesley Chang ◽  
Jianlin Li ◽  
Shaurjo Biswas ◽  
Greg Davies ◽  
...  
Keyword(s):  
Acoustic Monitoring

scholarly journals Acoustic monitoring of coastal dolphins and their response to naval mine neutralization exercises

2017 ◽  
Vol 4 (12) ◽  
pp. 170558 ◽  
Author(s):  
Marc O. Lammers ◽  
Marian Howe ◽  
Eden Zang ◽  
Megan McElligott ◽  
Amy Engelhaupt ◽  
...  
Keyword(s):  
Additive Model ◽  
Acoustic Monitoring ◽  
Acoustic Activity ◽  
Virginia Beach ◽  
Monitoring Study ◽  
Before And After ◽  
The Hours ◽  
Training Event ◽  
Passive Acoustic

To investigate the potential impacts of naval mine neutralization exercises (MINEX) on odontocete cetaceans, a long-term passive acoustic monitoring study was conducted at a US Navy training range near Virginia Beach, USA. Bottom-moored acoustic recorders were deployed in 2012–2016 near the epicentre of MINEX training activity and were refurbished every 2–4 months. Recordings were analysed for the daily presence/absence of dolphins, and dolphin acoustic activity was quantified in detail for the hours and days before and after 31 MINEX training events. Dolphins occurred in the area year-round, but there was clear seasonal variability, with lower presence during winter months. Dolphins exhibited a behavioural response to underwater detonations. Dolphin acoustic activity near the training location was lower during the hours and days following detonations, suggesting that animals left the area and/or reduced their signalling. Concurrent acoustic monitoring farther away from the training area suggested that the radius of response was between 3 and 6 km. A generalized additive model indicated that the predictors that explained the greatest amount of deviance in the data were the day relative to the training event, the hour of the day and circumstances specific to each training event.

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