1 edition of An investigation of the APAIR acoustic detection model found in the catalog.
An investigation of the APAIR acoustic detection model
Craig W. Goodman
by Naval Postgraduate School, Available from the National Technical Information Service in Monterey, Calif, Springfield, Va
Written in English
|Contributions||Forrest, R. N., 1925-|
|The Physical Object|
|Number of Pages||46|
Experimental and Numerical Investigation of Structural Damage Detection Using Changes in Natural Frequencies Xu, G. Y., Zhu, W. D., and Emory, B. H. (Janu ). "Experimental and Numerical Investigation of Structural Damage Detection Using Changes in Natural Frequencies." Guided Acoustic Wave Monitoring of Corrosion in Recovery Cited by: Applied Acoustics looks not only at recent developments in the Read more Since its launch in , Applied Acoustics has been publishing high quality research papers providing state-of-the-art coverage of research findings for engineers and scientists involved in applications of acoustics in the widest sense.
ADRPM (Acoustic Detection Range Prediction Model) is a software program that models the propagation of acoustic energy through the atmosphere and evaluates detectable distance. ADRPM predicts the distance of detection for a noise source based on the acoustic signature of the source. The acoustic sigCited by: 2. The authors of this program model performed much of the work done under the earlier project and have accordingly drawn heavily on the findings from the original research. On reading this report, it will be noted that this work/ itself, repre sents a methodology for the preventi(;>I1, detection, and correction of corruption in local iii.
Microphones and a sophisticated acoustic aircraft detection system may prove the key to unleashing the full potential of drones. PrecisionHawk CEO Michael Chasen delivered a keynote address May 1 at the Association for Unmanned Vehicle Systems International Xponential convention in Denver, sharing the stage with a pound multirotor drone. Discuss the objectives of criminal investigation. 3 Identify how research affects criminal investigation. 2 Explain the history of criminal investigation. 1 “Our current system of criminal investigation is a direct result of what we have learned and what we have inherited from the past.” Foundations of Criminal Investigation.
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Basic Equations of Acoustic Detector Performance The purpose of this section is to provide a basic introduction to the parameters affecting acoustic detection system performance. Those already familiar with the Sonar Equation and its components may wish to skip forward to the next Size: 3MB.
Specifically, this study is undertaking acoustic monitoring of the critically endangered White-bellied Heron (Ardea insignis) in Bhutan. Four different acoustic analysis methods are investigated in terms of their detection accuracy, involvement of human experts, and overall utility to ecologists for target species monitoring work.
Acoustic signals have been widely used for detection and identification purpose. Saad et al. introduced a method for weapon identification by capturing and analyzing its acoustic signature . In this research, the captured signature is projected into a subspace of already available acoustic signatures i.e.
In differential form1we have for the mass conservation: ∂ρ ∂t + ∇(ρv)= m, or ∂ρ ∂t + ∂ ∂xi. (ρvi)= m, () where ρis the ﬂuid density and v= (vi)is the ﬂow velocity at position x = (xi)and time t.
In principle we will consider situations where mass is conserved and so in general m = 0. Computational Investigation of a Full-Scale Proprotor Hover Performance and Flow Transition. Read the latest articles of Applied Acoustics atElsevier’s leading platform of peer-reviewed scholarly literature.
The electro-acoustic circuit model of the system can predict the overall behavior of the system. A symmetrically driven pair of steel rods was used to demonstrate that the model reproduces the main features of the signal.
Defect detection was demonstrated in steel rods containing simulated defects and also in recovered grounding electrodes. This paper considers passive broadband underwater source detection which is more practical but also more challenging than narrowband detection.
Typically, broadband source detection employs an energy detector. In this paper, a new detection technique is proposed which uses a Matched Filter (MF) and an Acoustic Vector Sensor (AVS).Cited by: 2.
Agglomeration is one of the most challenging problems due to overheating of the particles in fluidized bed reactors (FBRs). Therefore, it is an urgent task to develop a reliable and sensitive method, which can help accurately detect the agglomeration in an early stage. In this study, acoustic emission–early agglomeration recognition system (AE-EARS) has been put forward for fault by: Investigation of the influence of oil film thickness on helical gear defect detection using Acoustic Emission Article in Applied Acoustics – 46 May with 60 Reads How we measure 'reads'.
CiteScore: ℹ CiteScore: CiteScore measures the average citations received per document published in this title. CiteScore values are based on citation counts in a given year (e.g. ) to documents published in three previous calendar years (e.g. – 14), divided by the number of documents in these three previous years (e.g.
– 14). Detection and Identification of Acoustic Signatures, Pietila et. - Unclassified Page 2 of 6 sound and the ambient sound (soundscape), but still fall short of fully defining the temporal aspects of the problem. Some common approaches in defining acoustic detection models are as Size: KB.
As passive acoustic monitoring can generate large quantities of data, we required a detection algorithm that would run faster than real time.
While CNNs produce state of the art results for many tasks, naïve application of them for detection problems at test time can Cited by: The thesis presents a perceptual approach to audio-visual instrument design, composition and performance.
The approach informs practical work as well as a parametric visualisation model. The first computer model that was used for practical design of auditoria was a ray tracing model (Krokstad et al., ).
A large number of sound rays are traced from a source point up to high order reflections following the geometrical/optical law of reflection. The main result of this early model File Size: KB. This book contains a selection of refereed and revised papers of Intelligent Techniques and Applications track, and the Special Track on Intelligent Image Processing and Artificial Vision track originally presented at the International Symposium on Intelligent Systems Technologies and Applications (ISTA), August, Kochi, India.
This paper describes the development and deployment of three acoustic detection algorithms that reduce the power and storage requirements of acoustic monitoring on affordable, open-source hardware. The algorithms aim to detect bat echolocation, to search for evidence of an endangered cicada species, and also to collect evidence of poaching in a Cited by: 8.
Three-dimensional Mid-air Acoustic Manipulation by Ultrasonic Phased Arrays Authors and Affiliations Yoichi Ochiai*1, Takayuki Hoshi*2, and Jun Rekimoto*1,3 1 The University of Tokyo, Graduate School of Interdisciplinary Information Studies Hongo, Bunkyo-ku, Tokyo, Japan.
sensing capabilities for the detection and localization of direct weapon firings (e.g., snipers and RPGs) and indirect weapon firings (e.g., mortars and artillery) . Mortar detection The detection and localization of artillery guns on the battlefield is envisaged by means of acoustic aerial waves including sonic and infrasonic Size: KB.
S. Domen, H. Gotoda, T. Kuriyama, Y. Okuno, S. Tachibana, Detection and prevention of blowout in a lean premixed gas-turbine model combustor using the concept of dynamical system theory.
Proc. Combust. Inst. 35, – () CrossRef Google ScholarAuthor: Uddalok Sen, Achintya Mukhopadhyay, Swarnendu Sen. Acoustic Emission Beamforming for Detection and Localization of Damage Joshua Callen Rivey Chair of the Supervisory Committee: Associate Professor Jinkyu Yang UW Aeronautics and Astronautics The aerospace industry is a constantly evolving eld with corporate manufacturers continually utilizing innovative processes and materials.3.
Acoustic Tomography In acoustic tomography, data collected from sending acoustic waves through an object at many different angles are used to compute an image of changes of a physical quantity within the object under investigation (e.g.
attenuation or wave speed in transmission tomography or acous-tic impedance mismatch in reflection. Measurements of acoustic emission, vibration, and noise were performed on a Kaplan turbine model, with only two blades, in a cavitating condition.
Since a model with only two blades was used, most of the side effects were eliminated, and it was concluded that the cavitation itself is the source of the recorded by: