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Wednesday, April 29, 2020 | History

3 edition of Transients in one-, two- and three-dimensional acoustical systems found in the catalog.

Transients in one-, two- and three-dimensional acoustical systems

David Mintzer

Transients in one-, two- and three-dimensional acoustical systems

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  • 23 Currently reading

Published in Cambridge (Mass.) .
Written in English


Edition Notes

Thesis (Ph.D.) - Massachusetts Institute of Technology. Microfilm of typescript. Cambridge (Mass.); M.I.T. Libraries, 1968. 1 reel. 35mm.

The Physical Object
FormatMicrofilm
Pagination150p.
Number of Pages150
ID Numbers
Open LibraryOL13692969M

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Transients in one-, two- and three-dimensional acoustical systems by David Mintzer Download PDF EPUB FB2

The propagation of transient sound waves in bounded one‐ and three‐dimensional regions is studied by means of Laplace transform methods. In the one‐dimensional case, a plane wave is considered propagated down a rigid‐walled tube from a source at one end toward an acoustic termination at the other end.

The velocity potential for an arbitrary particle‐displacement input is found as a Cited by: The transient temperature charts presented earlier can be used to determine the temperature distribution and heat transfer in one-dimensional heat conduction problems associated with a large plane wall, a long cylinder, a sphere, and a semi-infinite medium.

Using a superposition principle called the product solution, these charts can also be used to construct solutions for the two dimensional. A numerical solution for the three dimensional transient motion of a marine cable during installation is presented for the case of a cable laying vessel arbitrarily chaning speed and direction while paying out cable with seabed slack.

The cable transient behaviour is governed by the numerical solution of a set of non-linear partial differential equations with the solution methodology Cited by:   Since the acoustical and fluid transients approaches give identical results in a one-dimensional case, the acoustics method was employed in a three-dimensional problem, which consists of a flow spreader and a tapered channel configuration, and it Cited by: 1.

This paper presents an approach to three-dimensional (3D) localization of ocean acoustic sources using a single three-component geophone on Arctic sea ice.

Source bearing is estimated by maximizing the radial signal power as a function of horizontal look angle, applying seismic polarization filters to suppress shear waves with transverse particle by: 2.

Real-time three-dimensional optoacoustic imaging using an acoustic lens system Article in Applied Physics Letters 85(5) August with 22 Reads How we measure 'reads'. Department Head: Dr.

Pedro Mago Major Advisor: Ms. Tammy Abbott Office: Carpenter Engineering Building. Mechanical Engineering is the application of science and mathematics to the design, development, and operation of mechanical and energy systems.

Analysis of source models for two-dimensional acoustic systems using the transfer matrix method Article in Journal of Sound and Vibration (1) September with 41 Reads. Audio is easily and meaningfully perceived by the -global- subjective human mind - and comprehended simultaneously.

A similar -meaning- can be obtained in the objective world of measurements if - as in the human mind - a reasonable amount of -local- objective measurements are simultaneously considered and weighted.

No single measurement is sufficient. The theory of two-dimensional (2D) sound systems has received much attention, and a common implementation is the Ambisonics system [1]–[16].

For regularly spaced cir-cular arrays, well-known panning functions may be de-rived by assuming an incident plane wave and applying a mode-matching procedure to determine the required loud.

two and three dimensional analysis of closely spaced double-tube tunnels The two tubes of underground railways in cities are constructed rather close together because of the station configurations.

The two tunnel tubes are driven one after the other. limited by two orthree dimensional effect associated with the physical construction of the aerodynamic model. For example, the aerodynamic model being tested is unlikely to actually be a cylinder or sphere, and furthermore, the distribution of the surface temperature of File Size: KB.

2 of 16 36 paper, the definition of dilution of precision (DOP) is similar to that in [13]. Moreno-Salinas et al. 37 studied the multiple target localization with range measurements in unconstrained two-dimensional 38 scenarios [14]. Some other work also paid attention to three-dimensional scenarios.

In [15], the authors 39 studied optimal sensor placement and motion coordination strategies Author: Lin Zhao, Xiaobo Chen, Yong Hao, Chengcai Lv, Lianhua Yu. Theories of sonar systems and their application to biological organisms (discussion).

Three-dimensional tracking using qualitative bionic sonar. Robotics and Autonomous Systems, (). Time is traded for intensity in the bat's auditory : Ashley Walker. Hysteresis is the dependence of the state of a system on its history. For example, a magnet may have more than one possible magnetic moment in a given magnetic field, depending on how the field changed in the of a single component of the moment often form a loop or hysteresis curve, where there are different values of one variable depending on the direction of change of another.

A true three-dimensional model was developed for determining the acoustical behavior of a complex photoacoustic (PA) system under realistic conditions. The behavior of the PA cell is modelled with an impedance matrix whose elements may be calculated via a serial expansion based on the eigenmodes of the PA by: 3.

Full text of "The Fourth Dimension Simply Explained" See other formats. Two different frequencies of excitation are selected in the numerical tests below. The first case corresponds to non-dimensional wave number kR= ωR c 0 =10 whereas kR=50 is chosen in the second case.

In computation, the problem is modeled only by half of the structure as shown in Fig. 2 on account of the symmetry. The mesh comprises 20 CFEs in the domain ranging from r 0 =R to r 1 =2R and a Cited by: 3.

Series expansions of rotating two and three dimensional sound fields. Poletti MA(1). Author information: (1)Industrial Research, Ltd, PO BoxLower Hutt, New Zealand.

[email protected] The cylindrical and spherical harmonic expansions of oscillating sound fields rotating at a constant rate are by: J. Sound Vib.

()15 (4), THE TRANSIENT RESPONSE OF A COUPLED PLATE-ACOUSTIC SYSTEM USING PLATE AND ACOUSTIC FINITE ELEMENTSt A. CRAGGS Department of Mechanical Engineering, University of Alberta, Edmonton, Alberta, Canada (Received 25 August ) Plate and acoustic finite elements are used to simulate the behaviour of a window-room by: Full text of "NASA Technical Reports Server (NTRS) An assessment of transient hydraulics phenomena and its characterization" See other formats (NASA-CH- ) AKI ASSESSMENT OF M\ TBAMSIEHT 8YDR ADLICS PHENOMENA AMD ITS CHARACTERIZATION Final Heport, 1 Apr.

- 30 Jan. {Drexel Oniv.). The recording of sound waves in a two-dimensional pattern (the hologram) and the use of the hologram to reconstruct the entire sound field throughout a three-dimensional region of space.

Acoustical holography, which first appeared in the s in studies in ultrasonics, is an outgrowth of optical holography, invented by Dennis Gabor in Three-Dimensional Motion Parameter Estimation By Holographic Acoustical Systems Hua Lee Proc.

SPIEPattern Recognition and Acoustical Imaging, pg (10 September ); doi: / 4 of 23 where the plane waves are traveling from left to right assuming that the source is at an infinite distance, m and M are the term number and total number of terms required in the series summation respectively, = 1 if ˛ = 0 and 2 if ˛ >0, and is a Bessel function of the first kind of mth order for variable coefficients k and a.

Fig. 1 Two-dimensional incident plane waves travelling Cited by: 3. Book Chapters: Hong Z. Tan and Alex Pentland, "Tactual Displays for Sensory Substitution and Wearable Computers," in Fundamentals of Wearable Computers and Augmented Reality, edited by Woodrow Barfield and Thomas Caudell, Mahwah, NJ: Lawrence Erlbaum Associates, pp.

(Chap. 18), PDF; Hong Z. Tan, Alex Pentland, and Lynne A. Slivovsky, "Sensing Chair and Floor Using. systems contain intrinsic randomness. We argue that this is relevant to modelling the universe and show how three-dimensional space may arise from a non-geometric order-disorder model driven by self-referential noise.

Keywords: Self-Referential Noise, Heraclitean. How is Extended 3D (Three-Dimensional) Analysis of Building Systems abbreviated. ETABS stands for Extended 3D (Three-Dimensional) Analysis of Building Systems. ETABS is defined as Extended 3D (Three-Dimensional) Analysis of Building Systems rarely.

I believe that the KR Enterprises VT amplifiers have a lot to do with the systems timing and pace, as well as the high speed VR-6 speakers, yet I am also convinced that the TDS unit has no detrimental effects regarding either clarity or speed of transients.

Papers In Refereed Journals. Multiscale two-way embedding schemes for free-surface primitive-equations in the Multidisciplinary Simulation, Estimation and Assimilation System. Journal of Marine Systems, Special issue on "Three-dimensional ocean circulation: Lagrangian measurements and diagnostic analyses", 29/,doi: For information, write to the Society for Industrial and Applied Mathematics, Market Street, Philadelphia, PA SIAM Spectral methods involve seeking the solution to a differential equation in terms of a series of known, smooth functions.

CEE Hydraulic Transients in Fluid Systems. 3 Credit Hours. Transient flow of liquids in piping systems. One-dimensional wave equations and method of characteristics. Effects of valves and pumps on water hammer.

Cavitation and liquid-column separation. Get your hands on some decent setup tools – now. A precise protractor like the Feickert or the Acoustical Systems SMARTractor, a good test record and a digital stylus force gauge.

If you are a master of the Feickert setup software, that won’t hurt either. minutes spent fine tuning the new will pay a world of dividends. space one. A two-dimensional frequency domain solution for a half-space has been developed by Kobayashi Banerjee and Mamoon 12 derived the half-space solution for the per- iodic point force using a technique developed by Mindlin 13 who solved the corresponding 3-D static problem.

Guan and. Simple one-dimensional waveguide models of loudspeaker enclosures describe well enclosures with simple interior geometry, but their accuracy is limited if used with more complex internal structures. The paper compares the results from one-dimensional models to FEM models for some simplified enclosure geometries found in typical designs.

Based on these results it is apparent that one. Acoustic modeling of a three-dimensional rectangular opened enclosure coupled with a semi-infinite exterior field at the baffled opening. Jin G(1), Shi S(1), Liu Z(1). Author information: (1)Institute of Vibration and Noise Control, College of Power and Energy Engineering, Harbin Engineering University, HarbinPeople's Republic of by: 7.Page 4 International Compressor Engineering Conference at Purdue, JulyFigure 2: Compressor near-field acoustic holography experiments, equivalent points, compressor schematic, and simplified schematic Reconstruction result for critical frequency Hz shown in Figure 3, it showed whole compressor had evident &.

Beforewhen the Compact Disc arrived, I didn't love LPs. Analog was already very old tech, and while every trick in the book had been applied to turntables and LPs, they still wowed & fluttered at 33 1/3 revolutions per minute.

Vinyl's deficiencies were legion: warped LPs were more common than truly flat ones; surface noise, clicks, and pops sang along with the tune; LPs rarely had. Physics Tree: publications by researcher. Year Citation Score; Gong Z, Marston PL, Li W.

T-matrix evaluation of three-dimensional acoustic radiation forces on nonspherical objects in Bessel beams with arbitrary order and al Review. PMID DOI: /PhysRevE Gong Z, Marston PL, Li W, Chai Y.

Multipole expansion of. A new code is being developed at the Y Plant for solving the time-dependent, three-dimensional Boltzmann transport model with feedback. The new code, PADK, uses the quasi-static method in its adiabatic form and is to be utilized to analyze hypothetical criticality accidents.

A description of the code along with preliminary results without feedback are presented in this by: 1. () admissibility of self-similar weak solutions of systems of conservation laws in two space variables and time. Journal of Hyperbolic Differential Equations 06 Cited by:. The only differences the sound at one ear compared to that of the other ear can have are differences in intensity, arrival time, two pinna patterns and absolute polarity.

In an acoustical concert hall or any real physical space, it is not possible for absolute polarity to be inverted at just one ear and certainly not at just one ear at all.Review of T-S Waves The disturbance state is restricted to two dimensions with a one-dimensional basic state.

The 2- D instability to be considered is a viscous instability in that the boundary-layer velocity profile is stable in the inviscid limit and thus, an increase in viscosity (a decrease in Reynolds number) causes the instability to.Michael B.

Porter and Homer P. Bucker,"Applications of Gaussian Beam Tracing to Two and Three-dimensional problems in Ocean Acoustics'', in Numerical and .