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Publications related to Acoustic Engineering (114)
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Conference Paper
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Beamforming is an acoustic imaging technique that allows the visualization of sound scenes via the generation of acoustic images, which can be treated as maps. The technique works with the processing of signals acquired with an array of microphones, therefore requiring a computational implementation to be applied. Currently, there are several toolb...
Conference Paper
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A geração de energia a partir de turbinas eólicas tem crescido em todo o mundo, apresentando novos desafios no que diz respeito a paisagem sonora ao seu redor. Nesse sentido, normas e legislações foram criadas para regulamentar a instalação de aerogeradores, prezando pela saúde dos que vivem próximo a usinas. De 2015 a 2019, esteve em vigor no Bras...
Article
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Acoustics is a broad field of knowledge that extends branches all over the physics of wave phenomena, psychology, natural sciences, and engineering. It is taught, in general, as part of engineering, physics, or architecture programs, or even in graduate programs specialized in the theme. In Brazil, acoustics was taught in graduate programs, until t...
Article
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The low-frequency behavior of acoustical transducers can be simulated with the so-called electroacoustical analogies (or lumped parameters). The main idea is that visual inspection of the transducer allows the derivation of an electroacoustic circuit that can be analyzed. The technique is computationally efficient and provides significant physical...
Conference Paper
Full-text available
Beamforming is an acoustic imaging technique widely applied in sound source localization. Its basic principles rely upon an array of receivers (usually microphones, in acoustics) that sample the sound field, thus creating time data, which is processed via computational digital signal processing (DSP) techniques. Such application integrates differen...
Technical Report
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O curso Engenharia Acústica da Universidade Federal de Santa Maria (UFSM), o ainda primeiro e único curso do tema no Brasil, recebe novamente (em 2021) o selo de 5 estrelas segundo o Guia da Faculdade, do Estadão. O curso teve início em 2009, de modo que foi reconhecido pelo Ministério da Educação (MEC) em 2014. Ademais, em 2016 o Conselho Federal...
Conference Paper
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O Dia Internacional de Conscientização Sobre o Ruído, ou INAD, é uma comemoração anual promovida pela comunidade de professores, profissionais e estudantes das ciências relacionadas ao som e audição. De acordo com a Organização Mundial da Saúde, o ruído é capaz de gerar efeitos fisiológicos negativos e induzir doenças metabólicas e cardiovasculares...
Conference Paper
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Anualmente, na última quarta-feira do mês de abril, comemora-se o “Dia Internacional de Conscientização Sobre o Ruído”, ou simplesmente INAD, seguindo a nomenclatura em inglês. Essa é uma campanha que envolve estudantes, educadores e profissionais de áreas relacionadas à ciência do som e da audição e tem como objetivo principal conscientizar a comu...
Article
Full-text available
Architects require the insight of acoustic engineers to understand how to improve and/or optimize the acoustic performance of their buildings. Normally this is supported by the architect providing digital models of the design to the acoustic engineer for analysis in the acoustician’s disciplinary software, for instance Odeon. This current workflow...
Conference Paper
Full-text available
Architects require the insight of acoustic engineers to understand how to improve and/or optimize the acoustic performance of their buildings. Normally this is supported by the architect providing digital models of the design to the acoustic engineer for analysis in the acoustician’s disciplinary software, for instance Odeon. This current workflow...
Article
Full-text available
They have spent more than 20 years teaching to listen to the soundscape of architecture and the city, applying the methodology of walking through architectural spaces blindfolded. This provides the student of Architecture and Acoustic Engineering, an unusual teaching about how these cities and buildings sound, and especially about the need or not t...
Presentation
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A visualização de campos acústicos pode ser realizada por meio da aplicação da técnica de beamforming, capaz de gerar imagens acústicas de fontes sonoras. Em geral, tais imagens são tratadas como mapas, sendo utilizadas para identificação de fontes de ruído. O beamforming é uma técnica que trabalha com a conformação de feixes sonoros, logo, seu des...
Thesis
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The write-up contents and studies were composed and developed the AIU Core Major Subject for the Doctorate (Ph.D.) Thesis Course Study Program based on the approved curriculum. More on researches studies, experiments, and engineering experiences gathered throughout the years of the topic about environmental, building and infrastructure services eng...
Poster
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Certificate of Participation: Academics & Researchers Platforms (IFAD) - Acknowledges that: Eng. Issam Shabani Has participated in activity titled: “Charisma and Acoustic Engineering".
Conference Paper
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Este trabajo presenta un modelo matemático para establecer el precio de venta de proyectos de ingeniería acústica (asesorías). El modelo matemático se basa en la clasificación de los diferentes costos que tienen este tipo de proyectos (administrativos, operacionales y de ingeniería), además de los gastos generales y utilidades de la empresa y un fa...
Conference Paper
Full-text available
INTRODUÇÃO: A poluição sonora é um problema de saúde pública mundial. Ela traz repercussões negativas na saúde humana e do meio ambiente, sendo a terceira forma de poluição que mais afeta o planeta. Com isso, o papel de profissionais (técnicos e de saúde) e da sociedade é de buscar a mitigar esse perigo da era moderna. O Dia Internacional de Consci...
Thesis
Full-text available
O presente trabalho trata da medição de respostas impulsivas para o cálculo de dois parâmetros acústicos de salas: tempo de reverberação e fator de força. Todo o trabalho foi realizado com auxílio da linguagem de programação Python, com o objetivo de que as ferramentas desenvolvidas passem a integrar o pacote de códigos abertos Python in Technical...
Article
Full-text available
As a sound transmitting device based on the nonlinear acoustic theory, parametric acoustic array (PAA) is able to generate high directivity and low frequency broadband signals with a small aperture transducer. Due to its predominant technical advantages, PAA has been widely used in a variety of application scenarios of underwater acoustic engineeri...
Conference Paper
Full-text available
This paper presents an overview of the methodologies employed in teaching Room Acoustics at the Federal University of Santa Maria (UFSM). Located in southern Brazil, it is currently the only undergraduate program in Acoustical Engineering in the country. Furthermore, some context is also given regarding graduate-level instruction. Throughout the wo...
Article
Full-text available
p>En este trabajo se desarrollan de forma numérica modelos empíricos que permiten conocer el comportamiento acústico de materiales utilizados en soluciones constructivas en la edificación. Este trabajo se engloba dentro del Máster Universitario en Ingeniería Acústica (MIA) de la Escuela Politécnica Superior de Gandía en la Universitat Politècnica d...
Article
Full-text available
Acoustic problem is a main issues of the existing classroom due to lack of absorption of surface material. Thus, a feed forward neural network system (FFNN) for classroom Reverberation Time (RT) estimation computation was built. This system was developed to assist the acoustic engineer and consultant to treat and reduce this matter. Data was collec...
Article
Full-text available
Las aproximaciones arqueológicas a los paisajes y lugares se han concentrado mayoritariamente en la permeabilidad visual de los espacios, postergando otras modalidades sensoriales. Esta tendencia se ha revertido gradualmente con aportes de diversas disciplinas como la geografía, la proxémica, la sociología, la ingeniería acústica y la arqueología....
Research Proposal
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Transportation is increasing day-by-day in this world, and with the increase in transportation automobile sector is increasing. Due to increase in automobile sector there are many challenges upcoming to automobile engineer. In these challenges, NVH is to be considered as one of them in it. An acoustic engineer must be worried about these problems i...
Conference Paper
Full-text available
Abstract: The first Brazilian undergraduate program in Acoustical Engineering has begun in 2009. Until then, studies on production, transmission, and sound reception were subjects only in graduate studies, such as Engineering (Mechanical, Electrical, and Civil), Physics, Speech-Language Pathology, Architecture, among others. The course has 3,750 ho...
Conference Paper
Full-text available
O presente trabalho analisa a importância do ensino da música para profissionais da Engenharia Acústica. O texto mostra que o único curso de graduação do Brasil possui quatro disciplinas com conteúdos de Música voltados para a Engenharia Acústica, as quais tratam desde conceitos físicos e matemáticos até assuntos relacionados à teoria musical, ritm...
Conference Paper
Full-text available
This paper describes a newly developed summative assessment for an engineering acoustics course offered to fourth year and postgraduate engineering students at the University of Auckland, New Zealand. The course teaches fundamental knowledge that Acoustics Engineers need and which underpins a variety of sub-disciplines in acoustics including fundam...
Conference Paper
Full-text available
La contaminación acústica es la segunda amenaza ambiental después de la polución del aire, según lo indican estudios recientes de la Organización Mundial de la Salud. En Chile con la entrada en vigencia del Decreto Supremo Nº38/11 del Ministerio de Medio Ambiente, se establecen límites de emisión de ruido más exigentes, por lo que las industrias bu...
Article
Full-text available
p>La enseñanza en el Máster de Ingeniería Acústica incluye contenido que requiere la modelización de sistemas acústicos de dos tipos: sistemas simples usando la teoría analítica y modelos complejos usando técnicas de simulación. En este trabajo, se describe un ejemplo de modelado de fuentes acústicas complejas mediante el método de los elementos fi...
Presentation
Full-text available
Im Automobilbau sind viele Werkzeuge virtuell: Das Virtual Dimension Center (VDC) gibt in einem neuen Whitepaper einen Überblick über die Anwendungsfelder und Trends dieser Virtuellen Techniken im Automobilbau. Sie kommen in Entwicklung, Produktion, Marketing, Training und Service zum Einsatz und machen physische Prototypen zunehmend überflüssig. D...
Conference Paper
Full-text available
The effects of automotive engine emission and exhaust noise on the natural environment has become a critical obstacle for living beings. Exhaust system is known to be a vital component of the automotive emission and environmental noise pollution. Exhaust noise from an Internal Combustion engine is one of the root cause for traffic noise pollution....
Article
Full-text available
Due to the need for a non-destructive method to measure sound absorption of acoustic materials, in situ methods have achieved significance in research on acoustic. So, the goal of this work is to build and test a system of in situ measurement of acoustic impedance to be used as an academic tool for undergraduate students of Acoustical Engineering o...
Article
Full-text available
Este estudo possui como objetivo a observacao do comportamento dos niveis de pressao sonora em uma determinada area da Zona Norte da cidade do Rio de Janeiro, a partir dos conceitos de Engenharia Acustica. No caso de extrapolacao dos limites legais estabelecidos quais medidas podem ser adotadas para mitigar o problema, tal qual uma reflexao a cerca...
Chapter
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Antecedentes. El Máster Universitario en Ingeniería Acústica surge debido a la demanda existente en los sectores públicos y privados, cuando se toma conciencia de la necesidad de diseñar los nuevos títulos de Grado y Postgrado orientados al Espacio Europeo de Educación Superior. Método. Se usaron los datos de la Universidad de Cádiz correspondiente...
Conference Paper
Full-text available
Noise remains the most prevalent occupational hazard associated with defense systems and operations critical to their sustainment. Concurrently, acquisition programs seem inconsistent in application of control measures and many new systems are noisier than their legacy predecessors. Common impediments to improved control include relative lack of em...
Article
Full-text available
OBJECTIVE:To verify the levels of sound pressure emitted by non-certified children's toys. Cross-sectional study of sound toys available at popular retail stores of the so-called informal sector. Electronic, mechanical, and musical toys were analyzed. The measurement of each product was carried out by an acoustic engineer in an acoustically isolate...
Conference Paper
Full-text available
A partnership between Brazil's first undergraduate program in Acoustical Engineering and the Institute of Technical Acoustics of RWTH Aachen University yielded in a didactic project that uses the engineering software MATLAB with the ITA-Toolbox to teach acoustic measurements. Simple electrical circuits are used to mimic typical behavior of acoustic...
Conference Paper
Full-text available
La calidad ambiental es uno de los componentes de la calidad de vida en una comunidad. Uno de los indicadores de esta calidad lo constituye el ruido acústico. Desde esta perspectiva, la comunicación que presentamos aborda un trabajo clásico de la ingeniería acústica como es un estudio acústico de impacto ambiental. En concreto dentro de la ciudad d...
Article
Full-text available
In this paper, different implementations of numerical locally reacting boundary conditions are studied for acoustic problems. In this comparative study we analyze two types of equations, the Euler equations and the wave equation. We also analyze both finite-differences time-domain (FDTD) algorithms, and pseudo-spectral time domain (PSTD) numerical...
Article
Full-text available
In recent years, magneto-rheological (MR) dampers have been used to control the response of structures. This paper presents the design and application of an H-infinity fault detection and isolation (FDI) filter and fault tolerant controller (FTC) for truss vibration control systems using MR dampers. A linear matrix inequality formulation is used to...
Thesis
Full-text available
Las TIC cada vez tienen un mayor impacto social en el mundo de la enseñanza a distancia, están surgiendo nuevos conceptos relacionados con la forma de llevar el aprendizaje a las personas. La generación de contenidos supone una práctica costosa en tiempo, recursos y personas, es por eso la tendencia a que sean reutilizables, accesibles, portables y...
Article
Full-text available
The fact that the research on acoustics represents an important segment of science and a significant necessity of society is certainly commonplace among acousticians. In many situations, however, it is only marginally incorporated into the curricula of universities. This is particularly the case in the Brazilian educational and research institution...
Article
Full-text available
En los últimos años se han desarrollado múltiples técnicas para la caracterización ultrasónica de productos hortofrutícolas en procesos postcosecha. Todas ellas han detectado parámetros acústicos macroscópicos comunes: una baja velocidad de propagación y una gran absorción. El presente trabajo presenta un modelo numérico para la simulación acústica...
Article
Full-text available
Measurement results showing intensity vector reconstructions using a rigid spherical microphone array in a vehicle cabin are presented. The measurement equipment developed by Nittobo was used in previous demonstrations to visualize the acoustic field using a beamforming technique superimposed on a picture from an on-board camera. In the present stu...
Article
Full-text available
An approach is presented that provides a prediction of the vector intensity field throughout a volume exterior to a rigid spherical measurement array consisting of 31 flush mounted microphones. The theory is based on spherical harmonic expansions of the measured field with the radial variation of the near-field pressure obtained using the Greens fu...
Conference Paper
Full-text available
Traditionally, Acoustic engineering has been marginalized in the Spanish university system. The present process of change of the degrees map and the Spanish university system and its adaptation to the European Higher Education Area are opening new possibilities of development on this aspect. The process road map has initiated by the reform of the s...
Book
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Uma sinopse sobre séries ortogonais generalizadas (e.g. Legendre-Fourier), com ênfase na representação trigonométrica de Fourier, é introduzida. A apresentação envolve o fenômeno de Gibbs, e critérios para a convergência de séries (condições de Dirichlet, teorema de Fourier, teorema de Fejér). Implicações do “Reino de Fourier” na Engenharia Acústic...
Article
Full-text available
In the field of noise-control engineering, information about the individual strength, and location, of the most dominant sources is of vital importance. This information allows the acoustic engineer to take effective measures in his effort to reduce the emitted acoustic noise levels. Near-field acoustic holography is a measurement-based tool which...
Article
Full-text available
During the Acoustic Engineering Test (AET) of the Acoustic Thermometry of Ocean Climate (ATOC) program, acoustic signals were transmitted from a broadband source with 75-Hz center frequency to a 700-m-long vertical array of 20 hydrophones at a distance of 3252 km receptions occurred over a period of-six days. Each received pulse showed early identi...
Article
Full-text available
Measurements of basin-scale acoustic transmissions made during the last four years by the Acoustic Thermometry of Ocean Climate (ATOC) program have allowed for the study of acoustic fluctuations of low-frequency pulse propagation at ranges of 1000 to 5000 km. Analysis of data from the ATOC Acoustic Engineering Test conducted in November 1994 has re...
Conference Paper
A engenharia acústica atua no sentido de promover o controle do ruído gerado por equipamentos no tratamento das ondas sonoras que afetam o receptor (normalmente o ouvido humano) ou diretamente na fonte do ruído. Nesse sentido, esse campo tem sido amplamente estudado e diversas pesquisas estão sendo desenvolvidas com o intuito de encontrar estrutura...
Article
The University of Hartford is home to two unique undergraduate engineering majors in acoustics, both sharing a core course layout of acoustics, vibrations, and projects. The Bachelor of Science in Mechanical Engineering with an Acoustics Concentration and the Bachelor of Science in Engineering in Acoustical Engineering and Music programs allow for...
Article
One of the transitions that engineering students must make as they enter the work force is the progression from theoretical concepts to applied/real world applications. At the University of Hartford, engineering design courses serve as culminating experiences devised to bridge this passage. One such course, Acoustics Capstone Design, challenges the...
Article
Introduction The reporting of operating theatre noise in the surgical literature dates back almost 50 years. The existing standards for noise and sound reporting in healthcare settings is heterogenous and there is a need for greater uniformity of reporting to support our growing understanding of the significance of communication and human factors o...
Article
No PDF available ABSTRACT The Structural Acoustics and Vibrations Technical Committee (TCSA) includes scientific study of vibrating structures, excited using either elastic or acoustic waves, and radiated acoustic fields from those structures. The committee members study a diverse range of physics relating to these basic phenomena, from damping and...
Article
No PDF available ABSTRACT The University of Hartford is home to two unique undergraduate engineering majors in acoustics, both sharing a core course layout of acoustics, vibrations, and projects. These include Vibrations 1/2, Fundamentals of Architectural and Musical Acoustics, Acoustics by Design (Project), Advanced Acoustical Topics, and Acoustic...
Book
This book presents articles from the World Conference on Acoustic Emission 2019 (WCAE-2019) held at Guangdong, China. The latest research and applications of acoustic emission (AE) are explored, with a particular emphasis on detecting and processing AE signals, the development of AE instrument and testing standards, AE of materials, engineering str...
Article
Traditional speakers make sound by attaching a coil to a cone and moving that coil back and forth in a magnetic field (aka moving coil loudspeakers). The physics behind how to generate sound via this velocity boundary condition has largely been unchanged for over a hundred years. Interestingly, around the time moving coil loudspeakers were first in...
Conference Paper
Often Engineers, and other technicians, are faced with situations whose legal framework is not clear or up-to-date, given the latest scientific developments in the field. This situation also frequently occurs with Acoustical Engineers (here understood in a broad sense: all technicians who work and have responsibilities in the area of Acoustics). Th...
Article
Located in West Hartford, CT, USA, the University of Hartford has two ABET-accredited acoustical engineering programs: the Bachelor of Science in Mechanical Engineering (BSME) with Acoustics Concentration and a unique interdisciplinary Bachelor of Science in Engineering with a major in Acoustical Engineering & Music. The national Accreditation Boar...
Book
Este livro é o texto original das notas de aula da disciplina Música para Engenharia Acústica I, em 2013 na UFSM. Ele trata de oscilações e ondas e aplicações à música através do software Matlab. A partitura da 5ª Sinfonia de Beethoven foi organizada em códigos matemáticos. Cada nota de cada compasso, de cada instrumento, de cada movimento da 5a Si...
Article
The University of Hartford has provided the author with a fulfilling métier, shepherding two undergraduate engineering programs in the area of acoustics: (1) the Bachelor of Science in Mechanical Engineering (BSME) with Acoustics Concentration and (2) the Bachelor of Science in Engineering with a major in Acoustical Engineering & Music. The first i...
Article
Vilhelm Lassen Jordan was the first acoustician engaged by Jørn Utzon to work on the Sydney Opera House. Jordan was a Danish acoustic engineer whose advice was based in strictly scientific, quantifiable acoustics, combined with precedent. He was a pioneer in acoustic modeling. Jordan had a major influence on Utzon’s first scheme for the Major Hall—...
Article
A correlation was confirmed in a study between noise sensitivity and ill-health. This study included clients that had hired an acoustic engineer to solve a noise problem, or patients who had a scheduled doctor’s appointment. Male and female patients in diverse outpatient specialty clinics including: Sports Medicine, Pain Medicine, Hematology & Onco...
Book
This book "Sound-based Assistive Technology" explains a technology to help speech-, hearing- and sight-impaired people. They might benefit in some way from an enhancement in their ability to recognize and produce speech or to detect sounds in their surroundings. Additionally, it is considered how sound-based assistive technology might be applied to...
Conference Paper
In recent years, numerical models have acquired a leading role in the academic-scientific field for the visualization and comprehension of many physical phenomena. Acoustic diffraction is a very important and difficult phenomenon to measure, since there are other overlapping phenomena that mask it. For students of Master´s Degree in Acoustic Engine...
Article
When Bonnie Schnitta saw a video of the Tacoma Bridge in Washington state collapse due to vibrations caused by wind conditions, she knew she had "heard" her calling. "I remember sitting there watching this and thinking, 'I have no idea what field it is where you would learn why that happened, but one day that's what I'm going to do,'" she recalls....
Conference Paper
Alessia Griginis (1), Raffaele Pisani (2), Chiara Devecchi (2), Paolo Onali (2), Stefano Sapienza (3) 1) Onleco, Torino 2) Studio Ingegneria Acustica Pisani, Rivoli (TO) 3) Libero Professionista 1. Premessa L'impiego dei modelli per realtà complesse, quale ad esempio il tratto Nord del Ro-doanel della città di San Paolo del Brasile, crea problemi p...
Article
For the multi-station positioning system in the field of underwater acoustics engineering, different geometric layout means different location precision. The location precision of the system was analyzed. The location precisions of several typical distributions were simulated, and the optimal form of distribution was provided. The rhombus distribut...
Article
Objective: We simulated the effect of using absorptive material to reduce the noise level in one of the noisiest part of a hospital, the pediatric ICU (PICU). Methods: Using GEONOISE® (Nittobo Acoustic Engineering Co., Ltd.), software to estimate the noise level, we compared measured and simulated values of noise in the PICU of Osaka Medical Center...
Article
The postgraduate education is the top education in our country. To cultivate the innovative postgraduates is the responsibility and mission that the time entrust the university and the postgraduate supervisors. The postgraduates’ innovative quality education has been a hot topic that attracts general attention from both the society and the higher e...
Article
In anticipation of the Shallow Survey Conference held in New Zealand in February 2012 a sub-bottom profiler (SBP) data set was collected in Wellington Harbor using the S-Boom system from Applied Acoustic Engineering Ltd (AAE). This uses a novel three-plate high-power synchronized sound source to improve resolution at deeper penetration; it is the f...
Article
Digital NVH development has become a common tool for any acoustic engineer. Vehicles in their early development stages are nowadays mainly described and validated as digital models. However there still remain needs for improvement in the domains of acoustic and vibration prediction, as instance: refining models, addressing intricate systems, and CA...
Conference Paper
The paper presents a new stand for subjective listening tests in Department of Mechanics and Vibroacoustics of Krakow University of Science and Technology, as well as a procedure and results of preliminary tests that utilise it. The most important difference, compared to the previously used stand, is exclusion of an analogue mixing console, which r...