Buscar
Mostrando ítems 1-10 de 1851
Room acoustics: Idealized field and real field considerations
(Acoustical Society of America, 2018-05)
How is an acoustically diffuse field defined? To what extent are the equations of diffuse field theory valid? These are the questions addressed in this presentation. The answers are explained through more general theories, ...
Simulação acústica de salas de aula em escolas de educação básica: uma proposta tipológica para prática musical
(Universidade Federal de Santa MariaBREngenharia CivilUFSMPrograma de Pós-Graduação em Engenharia Civil, 2012-09-24)
The study of room acoustics is linked to the importance of sound inside a room, so the architectural characteristics of the internal space determine the acoustic
behavior. To get better acoustics of a room there are ...
Analytical study of the acoustic field in a spherical resonator for single bubble sonoluminescence
(Acoustical Society of America Institute of Physics, 2009-09)
The acoustic field in the liquid within a spherical solid shell is calculated. The proposed model takes into account Stoke?s wave equation in the viscous fluid, the membrane theory to describe the solid shell motion and the ...
In-Dressing Acoustic Map by Low-Cost Piezoelectric Transducer
(Ieee-inst Electrical Electronics Engineers Inc, 2020-08-01)
The main difficulty in the grinding process is to identify the correct moment to dress the grinding wheel. Therefore, the cutting tool (grinding wheel) must be monitored. In this context, an innovative technique was developed ...
Acoustic settings combination as a sensory crispness indicator of dry crispy food
(2020-04-01)
Crispness is a critical attribute of quality for crispy products, which can be evaluated through both instrumental and sensory analyses. The aim of the study was to identify the best combination of settings of a device ...
Pair partitioning in time reversal acoustics
(Asociación Argentina de Mecánica Computacional, 2007-10)
Time reversal of acoustic waves can be achieved efficiently by the persistent control of excitations in a finite region of the system. The procedure, called Time Reversal Mirror, is stable against the inhomogeneities of ...
Study on the effect of the temperature in acoustic emission sensor by the pencil lead break test
(2019-01-25)
The Pencil Lead Break (PLB) method is used to reproduce an artificial source of acoustic emission. This method consists of breaking a pencil lead which has its size and thickness determined carefully in a certain angle in ...
Study on the effect of the temperature in Acoustic Emission Sensor by the Pencil Lead Break Test
(Ieee, 2018-01-01)
The Pencil Lead Break (PLB) method is used to reproduce an artificial source of acoustic emission. This method consists of breaking a pencil lead which has its size and thickness determined carefully in a certain angle in ...
Analysis of the stability and dispersion for a Riemannian acoustic wave equation
(ELSEVIER SCIENCE INC, 2019-01-15)
The construction of images of the Earth's interior using methods as reverse time migration (RTM) or full wave inversion (FWI) strongly depends on the numerical solution of the wave equation. A mathematical expression of ...
DIFFRACTION OF AN ACOUSTIC WAVE BY A PLATE IN A UNIFORM FLOW: A NUMERICAL APPROACH
(WORLD SCIENTIFIC PUBL CO PTE LTD, 2005)
We study the diffraction in time harmonic regime of an acoustic wave by a rigid plate in the presence
of a uniform flow in a duct. Contrary to prior analytical studies, using Wiener–Hopf techniques and
thus restricted ...