[PDF] Top 20 Underwater Acoustic simulations with a time variable acoustic propagation model
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Underwater Acoustic simulations with a time variable acoustic propagation model
... the time t evolves the initial IR g m ( 0 , ) gradually slides in the delay axis and is frequency shifted ...short time scale the sliding in time can be considered approximately zero but the shift ... See full document
7
Underwater acoustic communication using a time-reversal mirror approach
... Computer simulations using a normal-mode propagation model in a reallistic shallow water scenario show that, even with high uncertainty in the transmitter and receiver relative positions, the ... See full document
6
UAN: underwater acoustic network
... attained with the delivery and testing of the COM- LAB communication performance predicting and evaluation ...environmental, time-domain ray-based sound propagation and noise models, as well as ... See full document
7
From oceanographic to acoustic forecasting: acoustic model calibration using in situ acoustic measures
... the acoustic field has been presented, in which the acoustic model is calibrated with acoustic observations at past and present ...transect with a fixed acoustic system, ... See full document
12
USE OF RAY TRACING MODELING IN SHALLOW WATER ACOUSTIC SOURCE LOCALIZATION COMBINED WITH MATCHED-FIELD PROCESSING TECHNIQUES
... ABSTRACT. Underwater source localization based on acoustic modeling has been a subject of intensive research since a long ...based acoustic propagation models are often combined with ... See full document
14
Adaptation of an acoustic propagation model to the parallel architecture of a graphics processor
... An acoustic vector sensor (VS) is a device that measures the three orthogonal components of the particle velocity simultaneously with the pressure field at a single position in ...[6], underwater ... See full document
104
Acoustic-oceanographic data fusion for prediction of oceanic acoustic elds
... the acoustic field due to an underwater ...of acoustic propagation, which receive baseline properties and ocean forecasts as ...known with enough accuracy; 2) even the most sophis- ... See full document
204
Environmental model-based time-reversal underwater communications
... in underwater acoustic communications require the development of methods to accurately compensate channels that are prone to severe double spreading of time-varying multipath propagation, ... See full document
183
Underwater acoustic barrier 2007 UAB'07 Part A: the Hopavagen bay
... testing acoustic methods for protecting critical ...the acoustic barrier concept in an acoustically quiet and environmentally stable location in the Hopav˚ agen bay, 200 km from Trondheim, ...The ... See full document
41
A time-reversal suboptimal detector for underwater acoustic barriers
... the time reversal principle, where the ocean is used as a spatial matched filter, signal energy can be simultaneously focused on each ROA hydrophone and thus obtain the detector output by simple summation of the ... See full document
7
Wideband and wide beam polyvinylidene difluoride (PVDF) acoustic transducer for broadband underwater communications
... design model prototype was implemented in a COMSOL Multiphysics [16] platform in a 2D symmetric plane with the models Piezo Strain Plane for the active element actuation and the model Pressure ... See full document
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Braz. J. Chem. Eng. vol.34 número2
... The active energy is the main parameter responsible for the sonochemical reactions in sonication processes, and can be measured by absorbed acoustical energy. On the other hand, unabsorbed energy is the energy lost ... See full document
10
On the applications of a compact autonomous acoustic recorder
... the acoustic sensor to a recording device is ...noise with signifcant contributions to the received sound ...place with an au- tonomous ...rope, with a small weight at the bottom, suspended ... See full document
5
Concurrent Visualization of Acoustic Radiation Force Displacement and Shear Wave Propagation with 7T MRI.
... compared with current clinical systems. MR-Acoustic Radiation Force Imaging (MR-ARFI) provides a reliable and efficient method for beam localization by detecting micron- scale displacements induced by ... See full document
18
Acoustic Neurinomas
... The overall incidence of ANis about one per 100,000 person- years. However, the incidence appears to be increasing, probably due at least in part to the incidental diagnosis of asymptomatic lesions with the ... See full document
10
A versatile acoustic beacon for navigation and remote tracking of multiple underwater vehicles
... within acoustic range of at least 2 acoustic transponders (providing the AUV never crosses the ...real time, one of these transponders needs to be connected to the surface buoy and radio transmit ... See full document
6
Acoustic system for ground truth underwater positioning in DEEC's test tank
... the time that has elapsed, in clock periods, since the reception of the synchronization message ( itimer ) and a signal detection threshold ( ithreshold ...every time a new sample from ADC Demux arrives, it ... See full document
89
A buoy network system for acoustic monitoring
... An approach to the acoustic prediction problem Water column measurements Acoustic data Known set pdf estimators Acoustic inversion system ’Equivalent’ environment history[r] ... See full document
31
Basin scale simulations of ocean acoustic tomography in the Portuguese exclusive economic zone
... travel time data demands the usage of broadband coded source signals, with accu- rate synchronization of transmission and ...1986, with an explosive shot source at a range of 53,1 km and 244 m depth ... See full document
37
Analog Model for Quantum Gravity Effects: Phonons in Random Fluids
... analog model for fluctuations of the geometry of spacetime due to quantum gravity ...The model leads to the interpretation that such classical background fluctuations induce effective interactions on free ... See full document
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