Article
Oceanography
Eric Appeldoorn-Sanders, Michelle T. Scharer-Umpierre, Juan J. Cruz-Motta
Summary: The vulnerability of fish spawning aggregations to fishing pressure has led to fishing bans and closures in the Caribbean. This study used passive acoustic recorders to investigate vessel activity at three aggregation sites off western Puerto Rico, and found different patterns at different sites and seasons.
OCEAN & COASTAL MANAGEMENT
(2022)
Article
Biodiversity Conservation
Sean A. Dimoff, William D. Halliday, Matthew K. Pine, Kristina L. Tietjen, Francis Juanes, Julia K. Baum
Summary: Monitoring coral reefs is crucial for their conservation, with passive acoustic monitoring (PAM) identified as a potentially cost-effective method. This study explored the use of the Acoustic Complexity Index (ACI) and sound pressure level (SPL) in accurately capturing biological sounds on coral reefs, finding that ACI results were dependent on frequency band chosen and SPL was correlated with nearby fish sounds and snapping shrimp snaps. The study highlights the importance of field testing new acoustic metrics before widespread adoption, particularly in energetic underwater ecosystems like coral reefs.
ECOLOGICAL INDICATORS
(2021)
Article
Biodiversity Conservation
Isabella Melo, Diego Llusia, Rogerio Pereira Bastos, Luciana Signorelli
Summary: The application of passive acoustics in biodiversity monitoring has shown efficiency in detecting more species, especially when applied in the long term. The study reveals that species detection is associated with sampling effort and sampling duration. Therefore, passive acoustic monitoring is recommended for ecological research due to its potential to increase sampling effort and duration for better outcomes.
ECOLOGICAL INDICATORS
(2021)
Article
Ecology
Agnieszka Monczak, Bradshaw McKinney, Jamileh Souiedan, Alyssa D. Marian, Ashlee Seder, Eva May, Thomas Morgenstern, William Roumillat, Eric W. Montie
Summary: This study investigates the long-term patterns of sound production and spawning behavior of four fish species (black drum, silver perch, spotted seatrout, and red drum) in South Carolina estuaries. The results show that warmer springs lead to earlier and longer chorusing seasons for certain fish species, while cooler temperatures during late summer result in earlier and longer spawning seasons for red drum. The study also reveals a positive correlation between chorusing and young-of-the-year (YOY) abundance. These findings support the use of passive acoustics for monitoring the reproductive output of estuaries.
MARINE ECOLOGY PROGRESS SERIES
(2022)
Review
Medicine, Research & Experimental
Siddhi Hegde, Shreya Sreeram, Isaac L. Alter, Chaya Shor, Tulio A. Valdez, Kara D. Meister, Anais Rameau
Summary: This study examines the applications of cough sounds in screening tools and diagnostics in the biomedical and engineering literature. The research focuses on disease types, data collection protocols, data processing and analytics, accuracy, and limitations. The study finds that single-modality acoustic data collection is most common, with machine learning algorithms widely used for data analysis. The research commonly focuses on cough detection and COVID-19 screening, with pediatric studies mainly focused on asthma diagnosis. However, there are challenges such as nonstandardized data collection protocols and small, nondiverse datasets in the current cough sound literature.
Article
Clinical Neurology
Andre O. Werneck, Erin Hoare, Brendon Stubbs, Esther M. F. van Sluijs, Kirsten Corder
Summary: The study found that in girls, mentally-passive sedentary behavior at 11 years old was associated with later depressive symptoms, with this association being mainly mediated by BMI and mentally-passive sedentary behavior. No associations were observed in boys or between mentally-active sedentary behavior and later depressive symptoms.
JOURNAL OF AFFECTIVE DISORDERS
(2021)
Article
Acoustics
Michael D. Gray, Constantin C. Coussios
Summary: This study investigates the impact of in situ sound speed uncertainties on source localization in layered media and proposes an optimization method to improve the accuracy of coregistration between PAM and B-mode images.
IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL
(2022)
Review
Fisheries
Jean-Benoit Darodes de Tailly, Jonas Keitel, Matthew A. G. Owen, Jose M. Alcaraz-Calero, Mhairi E. Alexander, Katherine A. Sloman
Summary: The shrimp farming industry faces challenges with low feeding efficiency, and there are still many mysteries surrounding shrimp feeding behavior. While understanding of shrimp feeding behavior is improving in laboratory conditions, research on shrimp behavior in production ponds is relatively lacking. The use of passive acoustics, computer vision, and telemetry technologies has the potential to address these challenges and improve observations of shrimp feeding behavior in situ.
REVIEWS IN AQUACULTURE
(2021)
Article
Multidisciplinary Sciences
Dominik Bahlburg, Lukas Hueppe, Thomas Boehrer, Sally E. Thorpe, Eugene J. Murphy, Uta Berger, Bettina Meyer
Summary: Understanding the vertical migration behavior of Antarctic krill is crucial for comprehending their spatial distribution, ecophysiology, trophic interactions, and carbon fluxes. This study analyzes an eight-month continuous dataset collected from a commercial krill fishing vessel in the southwest Atlantic sector of the Southern Ocean. The findings reveal variability in the krill's vertical migration behavior within seasons, suggesting that factors such as environmental conditions, life stage, and predators contribute to this behavior. Furthermore, the study showcases the potential of utilizing data from krill fishing vessels to advance our understanding of krill ecology.
ROYAL SOCIETY OPEN SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Leonardo Dominguez Rubio, Matthew Collins, Ayusman Sen, Igor S. Aranson
Summary: This study presents the synergistic effect of acoustic and flow-induced focusing in microfluidic nozzles. By tuning the acoustic intensity, the positions and orientations of dispersed particles and dense clusters inside the channel were successfully manipulated. Furthermore, the acoustic field also selectively separated and extruded shape-anisotropic passive particles and self-propelled active nanorods under an external flow. The observed phenomena were explained by multiphysics finite-element modeling.
Article
Biology
Julia L. Y. Spaet, Paul A. Butcher, Andrea Manica, Chi Hin Lam
Summary: Understanding the movement and behavior of large marine predators, such as sharks, is crucial for their conservation. By tagging immature white sharks in Australian and New Zealand waters, researchers found that these sharks frequently dive up and down the water column and exhibit different diving behaviors during the day and night.
Article
Engineering, Civil
Ferran Mocholi Belenguer, Antonio Martinez-Millana, Francisco Sales Castells Ramon, Antonio Mocholi-Salcedo
Summary: One of the largest problems with electric vehicles is the absence of noticeable noise, potentially leading to accidents. Current regulations only establish emission levels without specifying the type of warning sound.
IEEE TRANSACTIONS ON INTELLIGENT TRANSPORTATION SYSTEMS
(2022)
Article
Chemistry, Physical
Prasanth P. Nair, Abhilash Suryan, Vinod Narayanan
Summary: This study evaluates the role of passive struts in the mixing of air and fuel through numerical simulations. The placement of the struts is found to significantly affect the mixing efficiency. Modal analysis identifies different modes responsible for mixing enhancement at different sections of the combustor, while broadband noise is observed due to large-scale mixing.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Multidisciplinary Sciences
Curtis Rasmussen, Andrea Alu
Summary: The efficiency and bandwidth of traditional passive acoustic radiators are severely limited, but these constraints can be overcome by loading a piezoelectric transducer with a non-Foster active circuit, resulting in significantly improved radiation bandwidth and efficiency. Experimental results demonstrate a threefold increase in bandwidth, paving the way for non-Foster acoustic radiation technologies.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Fisheries
Lauran R. R. Brewster, Ali K. K. Ibrahim, James Locascio, Breanna C. C. DeGroot, Laurent M. M. Cherubin, Matthew J. J. Ajemian
Summary: The Goliath groupers are known for their characteristic low frequency vocalizations during spawning aggregations and territorial behavior. A noise adaptive matched filter was used to automatically detect Goliath grouper calls from year-round passive acoustic recordings. Call rates were highest in August, around 0300 EST and just after the full moon, and when background noise was between 70 and 110 dB re 1 μPa. A smaller peak in call rates was also observed in May, suggesting other stimuli besides spawning may elicit high sound production in this species.