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42 Results Found

  • Article
  • Open Access
2,063 Views
16 Pages

Very little is known about goose-beaked whales (Ziphius cavirostris) and Sowerby’s beaked whales (Mesoplodon bidens), especially off the western coast of Ireland, due to their elusive behaviors. This study aimed to characterize the acoustics of...

  • Feature Paper
  • Article
  • Open Access
5 Citations
4,068 Views
16 Pages

On the Importance of Passive Acoustic Monitoring Filters

  • Rafael Aguiar,
  • Gianluca Maguolo,
  • Loris Nanni,
  • Yandre Costa and
  • Carlos Silla

Passive acoustic monitoring (PAM) is a noninvasive technique to supervise wildlife. Acoustic surveillance is preferable in some situations such as in the case of marine mammals, when the animals spend most of their time underwater, making it hard to...

  • Article
  • Open Access
12 Citations
4,235 Views
18 Pages

Combining Passive Acoustics and Environmental Data for Scaling Up Ecosystem Monitoring: A Test on Coral Reef Fishes

  • Simon Elise,
  • François Guilhaumon,
  • Gérard Mou-Tham,
  • Isabel Urbina-Barreto,
  • Laurent Vigliola,
  • Michel Kulbicki and
  • J. Henrich Bruggemann

16 May 2022

Ecological surveys of coral reefs mostly rely on visual data collected by human observers. Although new monitoring tools are emerging, their specific advantages should be identified to optimise their simultaneous use. Based on the goodness-of-fit of...

  • Article
  • Open Access
1 Citations
3,464 Views
17 Pages

MASE: An Instrument Designed to Record Underwater Soundscape

  • Iván Rodríguez-Méndez,
  • Jonas Philipp Lüke and
  • Fernando Luis Rosa González

29 April 2022

The study of sound in the natural environment provides interesting information for researchers and policy makers driving conservation policies in our society. The soundscape characterises the biophony, anthrophony and geophony of a particular area. T...

  • Article
  • Open Access
1 Citations
648 Views
14 Pages

Reconstruction Modeling and Validation of Brown Croaker (Miichthys miiuy) Vocalizations Using Wavelet-Based Inversion and Deep Learning

  • Sunhyo Kim,
  • Jongwook Choi,
  • Bum-Kyu Kim,
  • Hansoo Kim,
  • Donhyug Kang,
  • Jee Woong Choi,
  • Young Geul Yoon and
  • Sungho Cho

6 October 2025

Fish species’ biological vocalizations serve as essential acoustic signatures for passive acoustic monitoring (PAM) and ecological assessments. However, limited availability of high-quality acoustic recordings, particularly for region-specific...

  • Review
  • Open Access
132 Citations
18,415 Views
15 Pages

12 September 2018

Soundscape ecology is a rapidly growing field with approximately 93% of all scientific articles on this topic having been published since 2010 (total about 610 publications since 1985). Current acoustic technology is also advancing rapidly, enabling...

  • Article
  • Open Access
6 Citations
2,841 Views
14 Pages

Living Together, Singing Together: Revealing Similar Patterns of Vocal Activity in Two Tropical Songbirds Applying BirdNET

  • David Amorós-Ausina,
  • Karl-L. Schuchmann,
  • Marinez I. Marques and
  • Cristian Pérez-Granados

5 September 2024

In recent years, several automated and noninvasive methods for wildlife monitoring, such as passive acoustic monitoring (PAM), have emerged. PAM consists of the use of acoustic sensors followed by sound interpretation to obtain ecological information...

  • Article
  • Open Access
4 Citations
2,013 Views
12 Pages

Multiclass CNN Approach for Automatic Classification of Dolphin Vocalizations

  • Francesco Di Nardo,
  • Rocco De Marco,
  • Daniel Li Veli,
  • Laura Screpanti,
  • Benedetta Castagna,
  • Alessandro Lucchetti and
  • David Scaradozzi

16 April 2025

Monitoring dolphins in the open sea is essential for understanding their behavior and the impact of human activities on the marine ecosystems. Passive Acoustic Monitoring (PAM) is a non-invasive technique for tracking dolphins, providing continuous d...

  • Article
  • Open Access
919 Views
22 Pages

In the global context of biodiversity loss, increased demand for natural resources, and major efforts to restore ecosystems altered by human activities, the widespread use of passive acoustic monitoring (PAM) and acoustic recording devices allows for...

  • Article
  • Open Access
824 Views
13 Pages

Pilot Passive Acoustic Monitoring in the Strait of Gibraltar: First Evidence of Iberian Orca Calls and 40 Hz Fin Whale Foraging Signals

  • Javier Almunia,
  • Sergio García Beitia,
  • Jonas Philipp Lüke,
  • Fernando Rosa and
  • Renaud de Stephanis

8 December 2025

The Strait of Gibraltar is a major biogeographic bottleneck connecting the Atlantic Ocean and the Mediterranean Sea, where migratory cetaceans coexist with an intense maritime traffic. To evaluate the feasibility of broadband passive acoustic monitor...

  • Article
  • Open Access
38 Citations
7,760 Views
11 Pages

Hearing to the Unseen: AudioMoth and BirdNET as a Cheap and Easy Method for Monitoring Cryptic Bird Species

  • Gerard Bota,
  • Robert Manzano-Rubio,
  • Lidia Catalán,
  • Julia Gómez-Catasús and
  • Cristian Pérez-Granados

15 August 2023

The efficient analyses of sound recordings obtained through passive acoustic monitoring (PAM) might be challenging owing to the vast amount of data collected using such technique. The development of species-specific acoustic recognizers (e.g., throug...

  • Article
  • Open Access
24 Citations
8,170 Views
37 Pages

Passive Acoustic Monitoring as a Tool to Investigate the Spatial Distribution of Invasive Alien Species

  • José W. Ribeiro,
  • Kristopher Harmon,
  • Gabriel Augusto Leite,
  • Tomaz Nascimento de Melo,
  • Jack LeBien and
  • Marconi Campos-Cerqueira

13 September 2022

Invasive alien species (IAS) are a threat to biodiversity and ecosystem function worldwide. Unfortunately, researchers, agencies, and other management groups face the unresolved challenge of effectively detecting and monitoring IAS at large spatial a...

  • Article
  • Open Access
1,681 Views
17 Pages

17 July 2025

In recent years, passive acoustic monitoring (PAM) technology has significantly contributed to advancements in aquaculture techniques, system iterations, and increased production yields within intelligent feeding systems for Penaeus vannamei. However...

  • Article
  • Open Access
1 Citations
1,062 Views
10 Pages

Recent advances in passive acoustic monitoring (PAM) have markedly improved the ability to study marine soundscapes by enabling long-term, non-invasive monitoring of biological sounds across large spatial and temporal scales. Among aquatic organisms,...

  • Article
  • Open Access
9 Citations
4,681 Views
18 Pages

20 August 2023

Bare board AudioMoth recorders offer a low-cost, open-source solution to passive acoustic monitoring (PAM) but need protecting in an enclosure. We were concerned that the choice of enclosure may alter the spectral characteristics of recordings. We fo...

  • Article
  • Open Access
4 Citations
4,202 Views
21 Pages

Diversity Monitoring of Coexisting Birds in Urban Forests by Integrating Spectrograms and Object-Based Image Analysis

  • Yilin Zhao,
  • Jingli Yan,
  • Jiali Jin,
  • Zhenkai Sun,
  • Luqin Yin,
  • Zitong Bai and
  • Cheng Wang

8 February 2022

In the context of rapid urbanization, urban foresters are actively seeking management monitoring programs that address the challenges of urban biodiversity loss. Passive acoustic monitoring (PAM) has attracted attention because it allows for the coll...

  • Article
  • Open Access
1 Citations
1,272 Views
18 Pages

Automatic Detection and Unsupervised Clustering-Based Classification of Cetacean Vocal Signals

  • Yinian Liang,
  • Yan Wang,
  • Fangjiong Chen,
  • Hua Yu,
  • Fei Ji and
  • Yankun Chen

25 March 2025

In the ocean environment, passive acoustic monitoring (PAM) is an important technique for the surveillance of cetacean species. Manual detection for a large amount of PAM data is inefficient and time-consuming. To extract useful features from a large...

  • Article
  • Open Access
4 Citations
3,933 Views
13 Pages

Effect of Environmental Variables on African Penguin Vocal Activity: Implications for Acoustic Censusing

  • Franziska Hacker,
  • Francesca Terranova,
  • Gavin Sean Petersen,
  • Emma Tourtigues,
  • Olivier Friard,
  • Marco Gamba,
  • Katrin Ludynia,
  • Tess Gridley,
  • Lorien Pichegru and
  • Livio Favaro
  • + 2 authors

31 August 2023

Global biodiversity is in rapid decline, and many seabird species have disproportionally poorer conservation statuses than terrestrial birds. A good understanding of population dynamics is necessary for successful conservation efforts, making noninva...

  • Feature Paper
  • Article
  • Open Access
7 Citations
4,602 Views
14 Pages

Fin Whale (Balaenoptera physalus) in the Ligurian Sea: Preliminary Study on Acoustics Demonstrates Their Regular Occurrence in Autumn

  • Laura Pintore,
  • Virginia Sciacca,
  • Salvatore Viola,
  • Cristina Giacoma,
  • Elena Papale and
  • Giacomo Giorli

6 September 2021

The patterns of movement of the fin whale (Balaenoptera physalus (Linnaeus, 1758)) in the Mediterranean Sea are still a matter of debate. Feeding aggregations are well known in the Corso-Liguro-Provençal Basin from July to September, but little is kn...

  • Case Report
  • Open Access
10 Citations
3,992 Views
7 Pages

Bottlenose Dolphin (Tursiops truncatus) Whistle Modulation during a Trawl Bycatch Event in the Adriatic Sea

  • Valentina Corrias,
  • Giovanni de Vincenzi,
  • Maria Ceraulo,
  • Virginia Sciacca,
  • Antonello Sala,
  • Giuseppe Andrea de Lucia and
  • Francesco Filiciotto

19 December 2021

Marine mammal vocal elements have been investigated for decades to assess whether they correlate with stress levels or stress indicators. Due to their acoustic plasticity, the interpretation of dolphins’ acoustic signals of has been studied mos...

  • Article
  • Open Access
9 Citations
3,373 Views
21 Pages

Soundscape Characterization Using Autoencoders and Unsupervised Learning

  • Daniel Alexis Nieto-Mora,
  • Maria Cristina Ferreira de Oliveira,
  • Camilo Sanchez-Giraldo,
  • Leonardo Duque-Muñoz,
  • Claudia Isaza-Narváez and
  • Juan David Martínez-Vargas

18 April 2024

Passive acoustic monitoring (PAM) through acoustic recorder units (ARUs) shows promise in detecting early landscape changes linked to functional and structural patterns, including species richness, acoustic diversity, community interactions, and huma...

  • Article
  • Open Access
200 Views
14 Pages

Patterns of Vocal Activity of the Chinese Bamboo Partridge Using BirdNET Analyzer

  • Jinjuan Mei,
  • Lingna Li,
  • Wenwen Zhang,
  • Jie Shi,
  • Shengjun Zhao,
  • Fan Yong,
  • Xiaomin Ge,
  • Wenjun Tong,
  • Xu Zhou and
  • Peng Cui

19 January 2026

Passive acoustic monitoring (PAM) is an automatic and non-invasive method for long-term monitoring of bird vocal activity. PAM generates a large amount of data, and the automatic recognition of data poses significant challenges. BirdNET is a free-to-...

  • Article
  • Open Access
508 Views
23 Pages

Wavelet-Based Analysis of Soundscape Dynamics in a Riparian Woodland: The Bernate-Ticino River Park

  • Roberto Benocci,
  • Giorgia Guagliumi,
  • Andrea Potenza,
  • Valentina Zaffaroni-Caorsi,
  • Hector Eduardo Roman and
  • Giovanni Zambon

27 November 2025

Passive acoustic monitoring (PAM) is a valuable tool for ecological research, but many eco-acoustic indices show inconsistent correlations with biodiversity due to methodological variability and environmental noise. We propose a complementary, physic...

  • Article
  • Open Access
6 Citations
4,566 Views
15 Pages

A Case Study of Whistle Detection and Localization for Humpback Dolphins in Taiwan

  • Ching-Tang Hung,
  • Wei-Yen Chu,
  • Wei-Lun Li,
  • Yen-Hsiang Huang,
  • Wei-Chun Hu and
  • Chi-Fang Chen

In recent years, Taiwan’s government has focused on policies regarding offshore wind farming near the Indo-Pacific humpback dolphin habitat, where marine mammal observation is a critical consideration. The present research developed an algorithm call...

  • Article
  • Open Access
20 Citations
3,867 Views
17 Pages

Classification of Complicated Urban Forest Acoustic Scenes with Deep Learning Models

  • Chengyun Zhang,
  • Haisong Zhan,
  • Zezhou Hao and
  • Xinghui Gao

20 January 2023

The use of passive acoustic monitoring (PAM) can compensate for the shortcomings of traditional survey methods on spatial and temporal scales and achieve all-weather and wide-scale assessment and prediction of environmental dynamics. Assessing the im...

  • Article
  • Open Access
1 Citations
3,122 Views
20 Pages

Monitoring Postfire Biodiversity Dynamics in Mediterranean Pine Forests Using Acoustic Indices

  • Dimitrios Spatharis,
  • Aggelos Tsaligopoulos,
  • Yiannis G. Matsinos,
  • Ilias Karmiris,
  • Magdalini Pleniou,
  • Elisabeth Navarrete,
  • Eleni Boikou and
  • Christos Astaras

In recent decades, climate change has significantly influenced the frequency and intensity of wildfires across Mediterranean pine forests. The loss of forest cover can bring long-term ecological changes that impact the overall biodiversity and alter...

  • Article
  • Open Access
3 Citations
3,966 Views
11 Pages

Advanced Technologies for Cetacean Monitoring: A One-Health and Multidisciplinary Approach for Ocean Effective Surveillance

  • Silvana Neves,
  • Yann Doh,
  • Simona Sacchini,
  • Eric Delory,
  • Antonio Fernández and
  • Ayoze Castro-Alonso

Within the MARCET European project and community framework, a Waveglider®™ SV2 vehicle was deployed, equipped with a passive acoustic monitoring (PAM) device, in a Special Area of Conservation (SAC) of Gran Canaria (Canary Islands, Spain)....

  • Article
  • Open Access
10 Citations
5,186 Views
17 Pages

The Underwater Soundscape at Gulf of Riga Marine-Protected Areas

  • Muhammad Saladin Prawirasasra,
  • Mirko Mustonen and
  • Aleksander Klauson

Passive acoustic monitoring (PAM) is widely used as an initial step towards an assessment of environmental status. In the present study, underwater ambient sound recordings from two monitoring locations in marine-protected areas (MPAs) of the Gulf of...

  • Article
  • Open Access
874 Views
45 Pages

Marine mammal vocalizations, such as those of the Northern Right Whale (NARW), are often masked by underwater acoustic noise. The acoustic vocalization signals are characterized by features such as their amplitude, timing, modulation, duration, and s...

  • Article
  • Open Access
482 Views
16 Pages

Passive Acoustic Monitoring Provides Insights into Avian Use of Energycane Cropping Systems in Southern Florida

  • Leroy J. Walston,
  • Jules F. Cacho,
  • Ricardo A. Lesmes-Vesga,
  • Hardev Sandhu,
  • Colleen R. Zumpf,
  • Bradford Kasberg,
  • Jeremy Feinstein and
  • Maria Cristina Negri

10 November 2025

Birds are important indicators of ecosystem health and provide a range of benefits to society. It is important, therefore, to understand the impacts of agricultural land use changes on bird populations. The cultivation of energycane (EC)—a suga...

  • Article
  • Open Access
1 Citations
1,385 Views
35 Pages

Growing concern over anthropogenic underwater noise, highlighted by initiatives like the Marine Strategy Framework Directive (MSFD) and its Technical Group on Underwater Noise (TG Noise), emphasizes regions like the Western Black Sea, where increasin...

  • Article
  • Open Access
2 Citations
1,217 Views
14 Pages

18 February 2025

Marine organisms produce sounds for various purposes, including spawning, avoidance, and migration, with each species exhibiting unique acoustic characteristics. This study observed the grunt sounds of Pacific cod (Gadus macrocephalus) during the spa...

  • Article
  • Open Access
5 Citations
3,265 Views
15 Pages

Estimating Livestock Grazing Activity in Remote Areas Using Passive Acoustic Monitoring

  • Ilias Karmiris,
  • Christos Astaras,
  • Konstantinos Ioannou,
  • Ioakim Vasiliadis,
  • Dionisios Youlatos,
  • Nikolaos Stefanakis,
  • Aspassia D. Chatziefthimiou,
  • Theodoros Kominos and
  • Antonia Galanaki

22 July 2021

Grazing has long been recognized as an effective means of modifying natural habitats and, by extension, as a wildlife and protected area management tool, in addition to the obvious economic value it has for pastoral communities. A holistic approach t...

  • Article
  • Open Access
25 Citations
3,723 Views
23 Pages

Mapping of the Acoustic Environment at an Urban Park in the City Area of Milan, Italy, Using Very Low-Cost Sensors

  • Roberto Benocci,
  • Andrea Potenza,
  • Alessandro Bisceglie,
  • Hector Eduardo Roman and
  • Giovanni Zambon

6 May 2022

The-growing influence of urbanisation on green areas can greatly benefit from passive acoustic monitoring (PAM) across spatiotemporal continua to provide biodiversity estimation and useful information for conservation planning and development decisio...

  • Article
  • Open Access
4 Citations
5,088 Views
14 Pages

Acoustic Monitoring Confirms Significant Poaching Pressure of European Turtle Doves (Streptopelia turtur) during Spring Migration across the Ionian Islands, Greece

  • Christos Astaras,
  • Zoi-Antigoni Sideri-Manoka,
  • Manolia Vougioukalou,
  • Despina Migli,
  • Ioakim Vasiliadis,
  • Sotirios Sidiropoulos,
  • Christos Barboutis,
  • Aris Manolopoulos,
  • Michalis Vafeiadis and
  • Savas Kazantzidis

16 February 2023

The European turtle dove (Streptopelia turtur) is an Afro-Palearctic migrant whose populations have declined by 79% from 1980 to 2014. In 2018, the International Single Species Action Plan for the Turtle Dove (ISSAP) was developed with the goal of en...

  • Feature Paper
  • Article
  • Open Access
645 Views
17 Pages

29 October 2025

Amphibian breeding phenology provides key insights into species’ sensitivity to climatic and anthropogenic drivers. We used passive acoustic monitoring (PAM) with automated call detection to examine the calling activity of Dryophytes japonicus...

  • Article
  • Open Access
589 Views
14 Pages

24 October 2025

AI tools like Passive Acoustic Monitoring (PAM) and apps like iNaturalist and Merlin are increasingly used in bird monitoring and species identification. The purpose of this study was to assess whether AI-assisted binoculars improve bird species know...

  • Article
  • Open Access
466 Views
24 Pages

16 November 2025

Underwater passive acoustic monitoring (PAM) serves as a core approach pervasively applied to the long-term, non-invasive detection of biological acoustic signals. Dolphin whistles serve as a fundamental aspect of vocal communication, exhibiting intr...

  • Article
  • Open Access
127 Views
41 Pages

21 January 2026

Passive acoustic monitoring (PAM) using hydrophones enables collecting acoustic data to be collected in large and diverse quantities, necessitating the need for a reliable automated classification system. This paper presents a data-processing pipelin...

  • Article
  • Open Access
6 Citations
3,042 Views
16 Pages

A Convolutional Neural Network for Beamforming and Image Reconstruction in Passive Cavitation Imaging

  • Hossein J. Sharahi,
  • Christopher N. Acconcia,
  • Matthew Li,
  • Anne Martel and
  • Kullervo Hynynen

27 October 2023

Convolutional neural networks (CNNs), initially developed for image processing applications, have recently received significant attention within the field of medical ultrasound imaging. In this study, passive cavitation imaging/mapping (PCI/PAM), whi...

  • Article
  • Open Access
2 Citations
2,068 Views
25 Pages

The time–frequency characteristics of dolphin whistle signals under diverse ecological conditions and during environmental changes are key research topics that focus on the adaptive and response mechanisms of dolphins to the marine environment....

  • Article
  • Open Access
17 Citations
4,979 Views
16 Pages

The classification of vocal individuality for passive acoustic monitoring (PAM) and census of animals is becoming an increasingly popular area of research. Nearly all studies in this field of inquiry have relied on classic audio representations and c...