ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Publication Date: 2024-04-18
    Description: Automatic detection and classification of animal sounds has many applications in biodiversity monitoring and animal behavior. In the past twenty years, the volume of digitised wildlife sound available has massively increased, and automatic classification through deep learning now shows strong results. However, bioacoustics is not a single task but a vast range of small-scale tasks (such as individual ID, call type, emotional indication) with wide variety in data characteristics, and most bioacoustic tasks do not come with strongly-labelled training data. The standard paradigm of supervised learning, focussed on a single large-scale dataset and/or a generic pretrained algorithm, is insufficient. In this work we recast bioacoustic sound event detection within the AI framework of few-shot learning. We adapt this framework to sound event detection, such that a system can be given the annotated start/end times of as few as 5 events, and can then detect events in long-duration audio—even when the sound category was not known at the time of algorithm training. We introduce a collection of open datasets designed to strongly test a system’s ability to perform few-shot sound event detections, and we present the results of a public contest to address the task. Our analysis shows that prototypical networks are a very common used strategy and they perform well when enhanced with adaptations for general characteristics of animal sounds. However, systems with high time resolution capabilities perform the best in this challenge. We demonstrate that widely-varying sound event durations are an important factor in performance, as well as nonstationarity, i.e. gradual changes in conditions throughout the duration of a recording. For fine-grained bioacoustic recognition tasks without massive annotated training data, our analysis demonstrate that few-shot sound event detection is a powerful new method, strongly outperforming traditional signal-processing detection methods in the fully automated scenario.
    Keywords: Bioacoustics ; Deep learning ; Event detection ; Few-shot learning
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 2
    facet.materialart.
    Unknown
    Springer Nature | Springer International Publishing
    Publication Date: 2024-04-05
    Description: This open-access book empowers its readers to explore the acoustic world of animals. By listening to the sounds of nature, we can study animal behavior, distribution, and demographics; their habitat characteristics and needs; and the effects of noise. Sound recording is an efficient and affordable tool, independent of daylight and weather; and recorders may be left in place for many months at a time, continuously collecting data on animals and their environment. This book builds the skills and knowledge necessary to collect and interpret acoustic data from terrestrial and marine environments. Beginning with a history of sound recording, the chapters provide an overview of off-the-shelf recording equipment and analysis tools (including automated signal detectors and statistical methods); audiometric methods; acoustic terminology, quantities, and units; sound propagation in air and under water; soundscapes of terrestrial and marine habitats; animal acoustic and vibrational communication; echolocation; and the effects of noise. This book will be useful to students and researchers of animal ecology who wish to add acoustics to their toolbox, as well as to environmental managers in industry and government.
    Keywords: Animal Communication ; Bioacoustics ; Echolocation ; Hearing ; Sound production ; Vocalization ; Biotremology ; Syrinx ; Anthropogenic noise ; Mate choice ; Stridulation ; thema EDItEUR::P Mathematics and Science::PS Biology, life sciences::PSV Zoology and animal sciences ; thema EDItEUR::P Mathematics and Science::PH Physics::PHD Classical mechanics::PHDS Wave mechanics (vibration and acoustics) ; thema EDItEUR::P Mathematics and Science::PS Biology, life sciences::PSA Life sciences: general issues::PSAF Ecological science, the Biosphere ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TT Other technologies and applied sciences::TTA Acoustic and sound engineering ; thema EDItEUR::P Mathematics and Science::PS Biology, life sciences::PSV Zoology and animal sciences ; thema EDItEUR::P Mathematics and Science::PH Physics::PHD Classical mechanics::PHDS Wave mechanics (vibration and acoustics) ; thema EDItEUR::P Mathematics and Science::PS Biology, life sciences::PSA Life sciences: general issues::PSAF Ecological science, the Biosphere ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TT Other technologies and applied sciences::TTA Acoustic and sound engineering
    Language: English
    Format: image/jpeg
    Format: image/jpeg
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 3
    Publication Date: 2022-10-20
    Description: Author Posting. © American Geophysical Union, 2018. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research 1123(11), (2018): 8568-8580. doi: 10.1029/2018JC014352.
    Description: In the past decades, in the context of a changing ocean submitted to an increasing human activity, a progressive decrease in the frequencies (pitch) of blue whale vocalizations has been observed worldwide. Its causes, of natural or anthropogenic nature, are still unclear. Based on 7 years of continuous acoustic recordings at widespread sites in the southern Indian Ocean, we show that this observation stands for five populations of large whales. The frequency of selected units of vocalizations of fin, Antarctic, and pygmy blue whales has steadily decreased at a rate of a few tenths of hertz per year since 2002. In addition to this interannual frequency decrease, blue whale vocalizations display seasonal frequency shifts. We show that these intra‐annual shifts correlate with seasonal changes in the ambient noise near their call frequency. This ambient noise level, in turn, shows a strong correlation with the seasonal presence of icebergs, which are one of the main sources of oceanic noise in the Southern Hemisphere. Although cause‐and‐effect relationships are difficult to ascertain, wide‐ranging changes in the acoustic environment seem to have a strong impact on the vocal behavior of large baleen whales. Seasonal frequency shifts may be due to short‐term changes in the ambient noise, and the interannual frequency decline to long‐term changes in the acoustic properties of the ocean and/or in postwhaling changes in whale abundances.
    Description: The authors wish to thank the Captains and crews of RV Marion Dufresne for the successful deployments and recoveries of the hydrophones of the DEFLOHYDRO (Royer, 2008) and OHASISBIO (Royer, 2009) experiments. French cruises were funded by the French Polar Institute (IPEV) with additional support from INSU‐CNRS. NOAA/PMEL also contributed to the DEFLOHYDRO project. E. C. L. was supported by a PhD fellowship from the University of Brest and from the Regional Council of Brittany (Conseil Régional de Bretagne). The contribution of Mickael Beauverger at LGO to the logistics and deployment of the OHASISBIO cruises is greatly appreciated. The data underlying this analysis (weekly averaged frequencies of Antarctic blue whales, pygmy blue whales, and fin whales and daily averaged noise levels at each site) are accessible at http://doi.org/10.17882/51007.
    Description: 2019-05-27
    Keywords: Large baleen whales ; Blue whale calls ; Frequency decrease ; Bioacoustics ; Frequency shifts ; Ambient noise
    Repository Name: Woods Hole Open Access Server
    Type: Article
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 4
    Publication Date: 2022-08-19
    Description: © The Author(s), 2022. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Zitterbart, D., Bocconcelli, A., Ochs, M., & Bonnel, J. TOSSIT: a low-cost, hand deployable, rope-less and acoustically silent mooring for underwater passive acoustic monitoring. HardwareX, 11, (2022): e00304, https://doi.org/10.1016/j.ohx.2022.e00304.
    Description: Passive Acoustic Monitoring (PAM) has been used to study the ocean for decades across several fields to answer biological, geological and meteorological questions such as marine mammal presence, measures of anthropogenic noise in the ocean, and monitoring and prediction of underwater earthquakes and tsunamis. While in previous decades the high cost of acoustic instruments limited its use, miniaturization and microprocessor advances dramatically reduced the cost for passive acoustic monitoring instruments making PAM available for a broad scientific community. Such low-cost devices are often deployed by divers or on mooring lines with a surface buoy, which limit their use to diving depth and coastal regions. Here, we present a low-cost, low self-noise and hand-deployable PAM mooring design, called TOSSIT. It can be used in water as deep as 500 m, and can be deployed and recovered by hand by a single operator (more comfortably with two) in a small boat. The TOSSIT modular mooring system consists of a light and strong non-metallic frame that can fit a variety of sensors including PAM instruments, acoustic releases, additional power packages, environmental parameter sensors. The TOSSIT’s design is rope-less, which removes any risk of entanglement and keeps the self-noise very low.
    Description: The development of the TOSSIT mooring was supported by a Woods Hole Oceanographic institution Innovative Technology Award (Award number 25226). TOSSIT deployment in Argentina was supported by a Woods Hole Oceanographic Institution Mary Sears visitor award (Award number 24700) and TOSSIT deployments during SBCEX were funded by the Office of Naval Research Task Force Ocean (ONR TFO, Award number: N000141912627). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
    Keywords: Ocean ambient noise ; Mooring systems ; Soundscape ; Underwater sound ; Bioacoustics ; Oceanography ; Acoustical Oceanography
    Repository Name: Woods Hole Open Access Server
    Type: Article
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 5
    facet.materialart.
    Unknown
    Universidade Estadual de Maringá. Departamento de Biologia. Programa de Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais.
    Publication Date: 2022-07-06
    Description: Studies on sexual evolution, associated with behavioral issues are bound to work in anuran bioacoustics because they are animals that use vocalizations for reproduction and social interactions in choruses. In anurans, advances in bioacoustics try to associate social contexts in which vocalizations are emitted, influences of environment in which they live, other individuals in choruses and morphological characters on vocalizations, as well as evaluate the transmission of the signal emitted over long distances. Although these works started a long time ago, there is little information for the group, mainly in the Neotropical region, an area of high diversity of amphibians. The first approach of this study assessed the social context in which vocalizations of Physalaemus cuvieri were emitted, as well as influences of abiotic, morphological characters and distance between males on acoustic parameters. We observed that advertisement calls were emitted to territorial delimitation and attract females in all males, while courtship calls were emitted in a few individuals when females were distant less than 20 cm of males. Acoustic parameters were influenced by environmental, morphological and social characteristics, generating useful information for system evolution of sexual selection and aggressive interactions. We test too influence of environmental characteristics on acoustic parameters over long distances. Results show evidence that degradation and attenuation occur in advertisement call of Physalaemus cuvieri and they are influenced by environmental, not morphological characteristics. More robust characterizations of microhabitats is necessary to obtain results more evident, due to small size of frogs. Other parameters can also be associated with the evolution of signals over long distances as physiological and phylogenetic characteristics, parasites, predators and social context. In short, results not only contributed to greater knowledge about the biology of the species, but also to generate data still little known and generate insights for future comparative studies and the evolution of communication systems in anurans.
    Description: Estudos sobre evolução sexual, associados a questões comportamentais estão vinculados a trabalhos de bioacústica em anfíbios anuros, por serem animais que utilizam as vocalizações para reprodução e interações sociais no coro. Em anuros, avanços em bioacústica tentam desvendar os contextos sociais nos quais as vocalizações são emitidas, influências do ambiente em que vivem, outros indivíduos no coro e dos caracteres morfológicos nos cantos, bem como avaliam a transmissão do sinal emitido a longas distâncias. Ainda que estes trabalhos tenham iniciado a tempo, são escassas as informações para o grupo, principalmente na região neotropical, uma zona de alta diversidade de anfíbios anuros. Na primeira abordagem deste estudo foi avaliado o contexto social no qual as vocalizações de Physalaemus cuvieri foram emitidas, bem como influências de caracteres abióticos, morfológicas e distância entre machos nos parâmetros acústicos. Observou-se que o canto de anúncio foi emitido por todos os indivíduos com a função de delimitação territorial e atração de fêmeas, enquanto que o canto de corte foi emitido por poucos indivíduos quando a fêmea encontrava-se a menos de 20 cm do macho vocalizante. Os parâmetros acústicos foram influenciados por características ambientais, morfológicas e sociais, gerando informações úteis para a evolução do sistema de seleção sexual e interações agressivas. Também foi testado a influência das características ambientais sobre os parâmetros acústicos emitidos a longas distâncias. Os resultados mostram evidências de que ocorrem degradações e atenuações do canto de anúncio em Physalaemus cuvieri e que elas são influenciadas pelas características ambientais, e não morfológicas. Todavia são necessárias caracterizações mais robustas de microhábitats, devido ao reduzido tamanho dos anuros, para obtenção de resultados ainda mais evidentes. Outros parâmetros também, podem se associar a evolução dos sinais a longas distâncias como características fisiológicas, filogenéticas, parasitas, predadores e contexto social. Em suma, os resultados contribuíram não só para um maior conhecimento a respeito da biologia da espécie, mas também para gerar dados ainda pouco conhecidos e que geram subsídios para futuros estudos comparativos e evolução dos sistemas de comunicação em anfíbios anuros.
    Description: Masters
    Keywords: Vocal alteration ; Vocal repertoire ; Environmental selection ; Signal transmission ; Transmissão do sinal ; Alteração vocal ; Seleção ambiental ; Physalaemus cuvieri (ANURA, LEIUPERIDAE) "rã-cachorro" ; Repertório vocal ; Bioacústica ; Bioacoustics ; Populações, Biologia de
    Repository Name: AquaDocs
    Type: Thesis/Dissertation
    Format: 61pp.
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 6
    facet.materialart.
    Unknown
    Woods Hole Oceanographic Institution
    Publication Date: 2022-05-26
    Description: Translated from the Russian by Marina A. Svanidze. Edited by J. Christopher Haney and Cheri Recchia.
    Description: This monograph presents new original material on the behavior and bioacoustic signals of the belukha whale in its natural environment. A typological classification of the species' signals is based on researches that were conducted for many years. This book as well contains descriptions of the time-frequency characteristics of the main classes of sounds. Comparison of the behavior and signals of the belukha whale synchronized by time, enabled development of an ethological-acoustical model of individual behavioral activity in search and hunting, and this study reveals the function of certain sounds. Also, the study made it possible to obtain data on the navigational mechanism (or orientation mechanism) and emphasizes the role of sounds in all the different beharioral activities of the belukha whale. Studies conducted at the extreme points of its range enabled, for the first time, comparison of the ethological-acoustic attributes of the belukha whale in the White Sea and the Amur River estuary.
    Keywords: White whale ; Behavior ; Whale sounds ; Sound production by animals ; Bioacoustics ; Delphinapterus leucas ; Cetacea ; Beluga whale
    Repository Name: Woods Hole Open Access Server
    Type: Book
    Format: 7604519 bytes
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 7
    facet.materialart.
    Unknown
    Woods Hole Oceanographic Institution
    Publication Date: 2022-05-26
    Description: Originally issued as Reference No. 68-13
    Description: The harmonic interval indicated during spectrographic analysis of a rapid train of pulses may be used to determine the pulse repetition-rate. If the pulse rate is regular, but too rapid to be separated, the repetition-rate may or may not be represented on such analysis as a line at the repetition frequency, but will always be indicated by the separation between harmonic bands, the harmonic interval.
    Description: Office of Naval Research Contracts Nonr-4029 (00) NR 260-101 and Nonr-4446(00) NR 104-810.
    Keywords: Sound ; Bioacoustics
    Repository Name: Woods Hole Open Access Server
    Type: Technical Report
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 8
    Publication Date: 2022-05-26
    Description: Author Posting. © Acoustical Society of America, 2007. This article is posted here by permission of Acoustical Society of America for personal use, not for redistribution. The definitive version was published in Journal of the Acoustical Society of America 121 (2007): 3932-3937, doi:10.1121/1.2722056.
    Description: This study investigates how particular received spectral characteristics of stereotyped calls of sexually dimorphic adult killer whales may be influenced by caller sex, orientation, and range. Calls were ascribed to individuals during natural behavior using a towed beamforming array. The fundamental frequency of both high-frequency and low-frequency components did not differ consistently by sex. The ratio of peak energy within the fundamental of the high-frequency component relative to summed peak energy in the first two low-frequency component harmonics, and the number of modulation bands off the high-frequency component, were significantly greater when whales were oriented towards the array, while range and adult sex had little effect. In contrast, the ratio of peak energy in the first versus second harmonics of the low-frequency component was greater in calls produced by adult females than adult males, while orientation and range had little effect. The dispersion of energy across harmonics has been shown to relate to body size or sex in terrestrial species, but pressure effects during diving are thought to make such a signal unreliable in diving animals. The observed spectral differences by signaler sex and orientation suggest that these types of information may be transmitted acoustically by freely diving killer whales.
    Description: Funding was provided by WHOI’s Rinehart Coastal Research Center and Ocean Ventures Fund, and a Royal Society USA/Canada fellowship to PJOM.
    Keywords: Bioacoustics ; Underwater sound
    Repository Name: Woods Hole Open Access Server
    Type: Article
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 9
    Publication Date: 2022-05-26
    Description: Author Posting. © Acoustical Society of America, 2005. This article is posted here by permission of Acoustical Society of America for personal use, not for redistribution. The definitive version was published in Journal of the Acoustical Society of America 118 (2005): 3337-3345, doi:10.1121/1.2082707.
    Description: Sperm whales (Physeter macrocephalus) produce multipulsed clicks with their hypertrophied nasal complex. The currently accepted view of the sound generation process is based on the click structure measured directly in front of, or behind, the whale where regular interpulse intervals (IPIs) are found between successive pulses in the click. Most sperm whales, however, are recorded with the whale in an unknown orientation with respect to the hydrophone where the multipulse structure and the IPI do not conform to a regular pulse pattern. By combining far-field recordings of usual clicks with acoustic and orientation information measured by a tag on the clicking whale, we analyzed clicks from known aspects to the whale. We show that a geometric model based on the bent horn theory for sound production can explain the varying off-axis multipulse structure. Some of the sound energy that is reflected off the frontal sac radiates directly into the water creating an intermediate pulse p1/2 seen in off-axis recordings. The powerful p1 sonar pulse exits the front of the junk as predicted by the bent-horn model, showing that the junk of the sperm whale nasal complex is both anatomically and functionally homologous to the melon of smaller toothed whales.
    Description: This work was funded by grants to from the Office of Naval Research Grant Nos. N00014-99-1-0819 and No. N00014-01-1-0705, and the Packard Foundation.
    Keywords: Bioacoustics ; Underwater sound ; Biocommunications
    Repository Name: Woods Hole Open Access Server
    Type: Article
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 10
    facet.materialart.
    Unknown
    Massachusetts Institute of Technology and Woods Hole Oceanographic Institution
    Publication Date: 2022-05-26
    Description: Submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy at the Massachusetts Institute of Technology and the Woods Hole Oceanographic Institution September 1995
    Description: While many fishes are known to produce sounds during courtship and aggression, the information contained in the sounds and their role in reproduction is not well understood. This thesis is an intensive investigation of the sounds produced by the damselfish Dascyllus albisella, the effect of the environment on their acoustic signals, and how the sounds relate to reproduction. D. albisella males produce pulsed sounds during the signal jump, visiting by females, mating, aggression to heterospecifics and conspecifics, and nest preparation. Females make only aggressive sounds. The pulse period of aggressive sounds was shorter than courtship sounds. There was no difference between visiting and mating sounds, except in pulse duration. Two types of aggressive sounds were produced, pops and chirps. Pops were more commonly made towards heterospecifics than conspecifics. There were no differences in courtship sounds made by males from Johnston Atoll and Hawaii, except in pulse duration, which are likely due to differences in the recording environment. The pulsed sounds produced during the signal jump of D. albisella were analyzed to determine what information they contain about the signal jump and how they change with propagation. There was no relationship between signal jump speed or distance with the number of pulses or pulse period of the sound. There was no consistent change in the peak frequency of pulses in a call. If echoes were present in the sound, the change in echo delay would likely have been too small for damselfish to detect. Sounds attenuated with distance such that the signal to noise ratio decreased from 17-25 dB at 1-2m to 5-10 dB at 11-12 m. It is unlikely that D. albisella can detect sounds at or beyond 11-12m from the sound source, based on noise masking data from other fishes. Pulse period is least affected by propagation when compared to peak frequency, pulse duration, inter-pulse interval, and coefficient of variation of pulse amplitudes within a call. These results suggest that the sound produced during the signal jump acts over short distances and that the pulse period provides the most reliable basis for signal detection. A passive acoustic detection system was developed to continuously record sound production activity of individual males in the field. The rate of sound production could be used to determine the timing of spawning. The daily rate of sound production increased until the day of spawning, after which it decreased by over half. Additionally, the amount of sound production at night was highest just before spawning. The passive acoustic detector also revealed that D. albisella had regular peaks of calling at dawn, similar to the dawn chorus in birds. Patterns of male reproductive success varied for individual males over successive reproductive cycles and was not correlated to male size. The variation in reproductive success suggests that females choose males based on characters that vary from cycle to cycle. Data from the passive acoustic detector showed rates of courtship were positively correlated with reproductive success for three males. The continuous time-series of sound production were analyzed to determine appropriate sampling strategies to measure male sound production over shorter time periods using SCUBA. However, short samples of sound production (10 minutes or 60 minutes per male per day) were poor estimators of peak calling rates and daily calling rates. The rich variation in male courtship rates may contain information about male condition that has been previously ignored. Two reproductive synchrony measures were developed and used in randomization tests to test for synchronization of reproduction within five sites in the Johnston Atoll lagoon. Groups of isolated fish spawned in synchrony, but not in synchrony with other groups, even as close as 20-30 m. There was no apparent selective pressure for synchronous spawning when brood size, brood loss, and brood failure were considered. It is possible, though currently untestable, that there is a benefit of synchronous spawning for larval survival. It is unlikely that reproduction is synchronized in response to an environmental cue, because the scale of synchronization is small. Synchronization might develop through the courtship sound, because it regularly increases and decreases with spawning and the range of detectability is on the order of the range of synchronization. But, it is also possible that males are responding to chemical cues released by females. Spawning synchrony was also analyzed for 10 damsel fish species. D. albisella was among the most synchronized species, along with Abudefduf troschelii. Using a phylogenetic analysis of Chrornis, Amphiprion, and Dascyllus there are three viable hypotheses concerning the evolution of reproductive synchrony in D. albisella 1) it is an evolutionary relict that is no longer selected for and possibly maladaptive, 2) it evolved as part of the harernic lifestyle of the common ancestor of the Dascyllus genus, or 3) it evolved as the result of selection pressure for synchronization during the larval stage.
    Description: I was supported by the following grants to Phil Lobel: NOAA National Undersea Research Program (NOAA/NURC-FDU 89-09-NA88A-HURD 20), the Sea Grant program at WHOI (NA86-AA-D-SG090 project R/B-97-PD), the U.S. Army Chemical Materiel Destruction Agency (via NOAA Sea Grant NA90-AA-DSG535 and the Office of Naval Research N00014-91-J1591 and N00014-92-J-1969), the U.S. Army Legacy Resource Management Program (DAMD 17-93-J-3052), the Island Foundation and the Kelley Foundation. The Education office provided funds for travel to scientific meetings and the Copeland Family Foundation supported my connection to the internet.
    Keywords: Bioacoustics ; Pomacentridae ; Fishes
    Repository Name: Woods Hole Open Access Server
    Type: Thesis
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...