Virtual Acoustic
Mostrando 1-12 de 20 artigos, teses e dissertações.
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1. Numerical Study of Vibro-Acoustic Responses of Un-Baffled Multi-Layered Composite Structure under Various End Conditions and Experimental Validation
Abstract This article presents the vibro-acoustic modeling and analysis of un-baffled laminated composite flat panels subjected to harmonic point load under various support conditions. The frequency values of the panel are obtained by using simulation model through the commercial finite element package (ANSYS) via batch input technique. Initially, the rate o
Lat. Am. j. solids struct.. Publicado em: 2017-08
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2. Sound transmission across orthotropic cylindrical shells using third-order shear deformation theory
The objective of this paper is representation of an analytical solution to calculate transmission loss (TL) of an arbitrarily thick cylindrically orthotropic shell, immersed in a fluid medium with a uniform external airflow and contains internal fluids. The shell is assumed to be infinitely long and is excited by an oblique plane wave. The displacements are
Lat. Am. j. solids struct.. Publicado em: 2014
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3. Loudness scattering due to vibro-acoustic model variability
The use of numerical simulation in the design and evaluation of products performance is ever increasing. To a greater extent, such estimates are needed in a early design stage, when physical prototypes are not available. When dealing with vibro-acoustic models, known to be computationally expensive, a question remains, which is related to the accuracy of suc
J. Braz. Soc. Mech. Sci. & Eng.. Publicado em: 2012
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4. Reconstrução acústica das salas de cinema projetadas pelo arquiteto Rino Levi / Acoustic Reconstruction of the movie theatres designed by the architect Rino Levi
A historical virtual acoustical reconstruction was developed in five movie theaters designed by the architect Rino Levi from 1936 to 1941, in the cities of São Paulo and Recife, by means of computer simulations. Such approach was chosen because these movie theatres have been demised or are now used with different purposes. Rino Levi is recognized as one of
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 12/04/2011
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5. Influência do espalhamento acústico na percepção auditiva de espaços : métodos e desenvolvimentos / Acoustic scattering coefficient influence in the spaces auditive perception : methods and developments
A ambientação acústica de salas é um tópico muito importante nos espaços contemporâneos, principalmente quando considerada a tendência de utilização para várias finalidades. A adaptação do ambiente de acordo com o uso em questão é realizada a partir da alteração do direcionamento da energia sonora dentro deste ambiente. Esta redistribuição
Publicado em: 2011
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6. Simulação de um arranjo esférico de alto-falantes usando um modelo de membrana flexível / Simulation of a spherical loudspeaker array using a flexible membrane model
Duas abordagens para a simulação do campo sonoro produzido por um arranjo esférico de alto-falantes são apresentadas e comparadas a resultados experimentais. Na primeira, modos estruturais obtidos da analise modal experimental da membrana são usados em simulações vibroacusticas por elementos de contorno no software LMS Virtual.Lab®. Na segunda, adota
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/08/2010
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7. Aperfeiçoamentos no código computacional RAIOS incluindo aurilização / RAIOS computer code improvements including auralization
In this work, the most important improvements implemented in the computer code of numeric simulation of room acoustics, called RAIOS, are presented. These improvements are divided in four groups: Data importation process from DXF les; implementation of new acoustic quality parameters and steady state sound pressure level calculation; modications in order to
Publicado em: 2010
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8. Virtual acoustic prototyping applied to hammer noise of automotive tires / Prototipagem virtual sonora aplicada a ruido de martelamento de pneumaticos automotivos
This study explored the automotive tire noise generation mechanism known as hammer noise, according to the Virtual Acoustic Prototyping approach. A theoretical model available in the literature that considers only the plurality of block pitches in the tread band was implemented. Based on this model, two improved models were developed and implemented consider
Publicado em: 2009
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9. Modelagem Computacional da Propagação Acústica Proveniente de Fontes Multifrequênciais Usando Guias Digitais de Ondas / Computational Modeling of Wave Propagation from Multifrequêncial Source Using Mesh Digital Waveguide
The goal of this research is the creation of virtual acoustic environments, in this context, was constructed a computational tool, aiming to the acoustic modeling of reverberation environment. In this way, it was necessary to elaborate a numerical system able to simulate the wave sound propagation and, mainly its interactions with the surfaces encountered in
Publicado em: 2009
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10. Aplicação à música de um sistema de espacialização sonora baseado em Ambisonics. / A musical application of a sound spatialization system based on Ambisonics.
O trabalho envolve a pesquisa de técnicas para espacialização sonora musical e o desenvolvimento de um sistema de espacialização sonora sobre uma arquitetura de áudio multicanal aberta (AUDIENCE) para a auralização imersiva. Utilizando-se a técnica Ambisonics, o sistema construído permite a recriação de um campo sonoro tridimensional. O sistema r
Publicado em: 2007
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11. Modelagem endoscÃpica virtual do monitoramento de equipamentos elÃtricos de alta tensÃo
With the promulgation of the 10.847/2004 and 10.848/2004 Laws, the Brazilian Power Sector started adopting competitiveness as the main element for obtaining concessions in the electric power system transmission and generation sectors. In this sense, the power sector companies will have to strongly intensify the monitoring processes of the power system equipm
Publicado em: 2007
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12. Editor MIDI para violão com articulação humanizada nota a nota e qualidade acústica em linguagem funcional pura
This work presents as main goal to implement a computational application that allows the user create MIDI musical sequences for guitar. The difference of the musical sequences generated by the software resides in the fact that each musical note of the MIDI sequence can be modified for the inclusion of humanized articulation, individualized and with timbral q
Publicado em: 2007