Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 46 for “"acoustic monitoring"”.
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Development of instrumentation for acoustic monitoring
This thesis describes a source/sink flow acoustic wave sensor for the identification of leaks in gas pipelines. One of the many type of signals associated with the high velocity gas flowing out of a hole in the pipeline is the ramp or step pressure drop.;A large 3-inch diameter diaphragm was …
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Acoustic monitoring of hydraulic stimulation in granites
… mechanics the subject of considerable study. Acoustic emissions, or microseisms, contribute greatly to these studies and have been employed on a wide range of topics in rock mechanic studies. At Colorado School of Mines, acoustic emission technology has been employed to monitor stimulation of …
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Acoustic monitoring of hydraulic resistance in partially full pipes.
… on the development of a novel, non-invasive acoustic method and instrumentation to measure the hydraulic roughness in partially filled pipes under various structural and operational conditions objectively. This research presents systematic laboratory and field studies of the hydraulic and …
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Evaluating the use of acoustic monitoring for surveying tropical birds
In this study I evaluated the effectiveness of an acoustic recording system (SRS) for surveying tropical bird communities and species relative to traditional point count surveys. To address this goal, I compared species richness, composition and detection probability of 20 species between SRS and …
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Investigating blue and fin whale populations through passive acoustic monitoring using ocean bottom seismometers
… before its international ban in the 1980s. Monitoring the recovery of their populations is difficult to study with traditional animal survey methods. Visual transect methods using ships and planes cover only small portions of baleen whales’ vast migratory ranges that span thousands of …
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Modelling the range-wide density patterns of the Arthroleptella lightfooti using acoustic monitoring data
… Africa. I used density estimates obtained from acoustic Spatially Explicit Capture Recapture (aSCR) methods and data from an acoustic survey using an array of 6 microphones to construct the first Peninsula wide population-density surface for this visually cryptic but acoustically active species. …
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Using Passive Acoustic Monitoring to Estimate Bird Community Response to Land Management in Southeastern Georgia
… or relative abundance from ARU data. Passive acoustic monitoring with ARUs can enable efficient monitoring of avian populations. RN models may be well suited for estimating abundance or relative abundance from ARU detection/non-detection data; as repeated surveys can easily be conducted with …
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Temporal and spatial distributions of baleen whales in central New Zealand, based on passive acoustic monitoring
… and how they overlap with threats. Passive acoustic monitoring (PAM) is a non-invasive method to investigate the distribution of free-ranging species that reliably produce sound, and soundscape analysis enables an integrated approach whereby vocal species are sampled concurrently with …
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Bioacoustic Studies of Population Size and Microdialects in an Island-Living Savannah Sparrow Population
Bioacoustic monitoring provides an innovative technique for studying the behaviour and ecology of wild birds. In this thesis I use bioacoustic monitoring as a tool for studying Savannah Sparrows (Passerculus sandwichensis). In my first data chapter, I tested the accuracy of passive acoustic …
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Towards multimodal monitoring of large African carnivores
… are camera traps and GPS or VHF collars. Passive acoustic monitoring could act as a complementary monitoring tool because both species produce loud, recognisable vocalisations that propagate long distances. Yet, no such survey has occurred for leopards and passive acoustic monitoring for lions has …
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Assessing the impacts of white-nose syndrome induced mortality on the monitoring of a bat community at Fort Drum Military Installation
… of the endangered Indiana bat (Myotis sodalis), acoustic monitoring is now likely more effective than traditional capture methodologies. In the summers of 2011 and 2012, I implemented intensive acoustic sampling using Anabat detectors at Fort Drum to develop a summer acoustic monitoring protocol …
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Recording, in-situ processing and near real-time satellite transmission of acoustic data from a low-cost marine drifter buoy
Marine acoustic pollution has become a pervasive, yet largely invisible, threat to marine ecosystems, with existing monitoring technologies presenting significant economic and logistical barriers that limit widespread implementation. Rising levels of anthropogenic noise from shipping, construction, …
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EnviroSuite: An Environmentally-Immersive Programming Framework for Wireless Sensor Networks
… systems such as military surveillance, and monitoring systems such as environmental acoustic monitoring. We install these applications into off-the-shelf hardware platforms and physically deploy the hardware into realistic environments. Empirical results collected from such deployments …
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Acoustic sampling considerations for bats in the post-white-nose syndrome landscape
… are not well understood, and although acoustic monitoring is commonly used to monitor these populations, there is limited information about differences among acoustic detectors and the implications to managers thereof. My objectives were to model the relationship between WNS impact, …
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Assessing the Long-term Impacts of White-nose Syndrome on Bat Communities Using Acoustic Surveys at Fort Drum Military Installation
… bat species, increased reliance on acoustic monitoring is now the new "normal". As such, the ability to accurately identify individual bat species with acoustic identification programs has become increasingly important. Additionally, how bat distribution and habitat associations have …
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In-Situ Defect Detection Using Acoustic Vibration Monitoring for Additive Manufacturing Processes
… often on micron scales.</p> <p>Through in-situ monitoring techniques, such as visual or acoustic monitoring, a secondary level of quality assessment can be performed. This type of real time monitoring solution can be used in a variety of ways to help reduce scrap rate, increase overall quality, …
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Spatial and Temporal Activity of Migratory Bats at Landscape Features
… species that migrate within a regional area. I acoustically sampled four species of bats classified as latitudinal and regional migrants. I monitored twelve sites located in southwestern Ontario at four landscape features between May and October 2011. I found that specific landscape features may …
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Automatic baleen whale detection and 2D localization using a network of unsynchonized passive acoustic sensors
Underwater acoustics is a powerful tool for learning about the ocean’s soniferous marine life. However, most modern acoustic sensing systems consist of expensive arrays of timesynchronized recorders which require a crewed research vessel and significant expertise to deploy, operate, and recover. …
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Automatic Baleen Whale Detection and 2D Localization Using a Network of Unsynchronized Passive Acoustic Sensors
Underwater acoustics is a powerful tool for learning about the ocean's soniferous marine life. However, most modern acoustic sensing systems consist of expensive arrays of time-synchronized recorders which require a crewed research vessel and significant expertise to deploy, operate, and recover. …
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