Mini-courses

 

Morning - 08/28/2022
8am - 12pm


Mini-course 01

Sound Absorption Materials

Sound absorption materials are used in various everyday situations, such as in aeronautics, automobiles, in buildings, as well as in residential or industrial equipment. This mini-course is intended to give an overview of the subject, which is very important in the field of acoustics. The concepts and classifications of materials will be reviewed, as well as the most important analytical models used in practice. Performance parameters such as sound absorption and transmission loss will be reviewed, elucidating the possibilities of experimental measurements existing in the literature and in standards. A series of macroscopic parameters (acoustic and structural) that represent the porous structure of the materials will also be presented, as well as the experimental techniques for measuring each one of them. Numerical approaches (finite elements and boundary elements) of the application of porous materials will be passed on with the intention of elucidating practical situations. Finally, very current concepts about metamaterials and multiple resonators will be presented.

 

Speaker: Paulo Henrique Mareze - UFSM
Graduated in Mechanical Engineering from the State University of Maringá. Paulo completed his master's degree and doctorate in Mechanical Engineering at the Federal University of Santa Catarina, in Vibrations and Acoustics, under the supervision of Professor Arcanjo Lenzi. He is currently an associate professor at the Federal University of Santa Maria, in Rio Grande do Sul, where he frequently teaches Fundamentals of Acoustics, Noise Control, Experimental Methods in Acoustics and Vibrations and Numerical Methods in Acoustics and Vibrations. The main lines of research involve: Experimental and Numerical Characterization of Sound Absorption porous aeronautical/automotive materials and asphalt (and bituminous) samples; Development of the Sound Intensity Technique for Source Imaging; Study of multiple resonators and periodic metamaterials for noise control and low frequency vibrations. Modeling in Finite Elements and Boundary Elements of vibroacoustic problems with or without viscothermic dissipation. In 2019 he carried out a post-doctorate at the University of Coimbra (Portugal), with the development of numerical simulation codes for noise-absorbing materials and acoustic metamaterials, as well as the development of experiments with optimized 3D printing materials.

 


Mini-course 02

Field and laboratory measurements of the acoustic performance of buildings

Based on practical cases, the main aspects of the test procedures for the analysis of materials, elements and construction systems and the classification of acoustic performance will be addressed. It will focus on test experiments to determine the acoustic performance in laboratory and in the field: equipment, infrastructure and regulatory aspects. The characterization of materials will be addressed in tests of dynamic stiffness and creep in compression for resilient layers of floating floors, and sound absorption coefficient for coating materials.

 

Speaker: Maria Fernanda de Oliveira - UNISINOS
Graduated in Architecture and Urbanism from Unisinos, Master's in Civil Engineering from UFSM, PhD in Engineering from UFRGS and Post-Doctorate from LNEC/Portugal. Currently, she is part of the coordination of the Regional RS of SOBRAC and works at Unisinos as a researcher at ITT Performance, coordinator of LAVIT (Laboratory of Acoustics, Vibrations, Lighting and Thermal), professor and coordinator of the PPG in Architecture and Urbanism. Production in applied research and service provision for construction companies with emphasis on acoustic performance of buildings.

 

Mini-course 03
Optimization in acoustics and vibration

In this course, the main strategies for the application of optimization methodologies in vibration and acoustic problems will be presented. Initially, a brief review of mathematical and heuristic methods will be carried out. Then, some techniques will be demonstrated for the adaptation of acoustic and vibratory quantities as objective and constraint functions in optimization problems. Methods for analyzing the sensitivity of such quantities will also be presented. With these fundamentals in mind, examples using parametric, shape and topological optimization will be detailed and discussed.

 

Speaker: Olavo M Silva, Dr. Eng. - UFSC
Mechanical Engineer (UFSC/2004) and PhD in Mechanical Engineering (UFSC/2017). Researcher at the Stemmer Foundation for Research, Development and Innovation. Member of the International Society for Structural and Multidisciplinary Optimization. technical reviewer of Magazines like Journal of Sound and Vibration and Structural and Multidisciplinary Optimization. His research focuses on topological optimization and form applied to development of low noise products.

 

Mini-course 04
Urban soundscape

The course will translate into a didactic, scientific and sound sensory experience in the gardens of Costão do Santinho Resort and its surroundings. In it, activities will be developed to raise the awareness of the participants about the importance of Soundscape for the well-being and quality of life in the urban environment, as well as discussing its application as an Urban Planning tool.

 

Speaker: Antonio Carlos Lobo Soares - MUSEU PARAENSE EMÍLIO GOELDI
Architect PhD and specialist in Acoustic Engineering from the University of Lisbon, PT. Master in Development and Urban Environment from Universidade da Amazônia, BR. Museologist, Plastic Artist and Senior Technologist at the Museu Paraense Emílio Goeldi. Today he is secretary of SOBRAC Norte.

 

Mini-course 05
Acoustic virtual reality and computer simulation in room acoustics

The following topics will be covered in this mini-course:
1. What is Acoustic Virtual Reality effectively? 2. The meaning and importance of auralization; 3. Basic principles of acoustic modeling; 4. The two regions defined by the Schroeder frequency; 5. Low frequencies: the boundary element method; 6. Medium and high frequencies: geometric acoustics; 7. Different models in geometric acoustics and hybrid methods; 8. Validation of methods: the four round-robins; 9. Deviations (still) presented by several programs; 10. A weak point: the measurement of absorption and scattering coefficients; 11. Artificial intelligence techniques applied to the generation of auralization; 12. Dynamic auralization: how to reduce computational complexity;13. Some successful examples of auralization.

 

Speaker: Roberto A. Tenenbaum - UFSM
He holds a degree in Mechanical Engineering from the Federal University of Rio de Janeiro (1972), a specialization in Higher Education Methodology from the Getúlio Vargas Foundation (1976), a master's degree in Mechanical Engineering from the Federal University of Rio de Janeiro (1975) and a PhD in Mechanical Engineering from the Federal University of Rio de Janeiro (1987). He was a professor and researcher for over 30 years (1974-2004) at the Department of Mechanical Engineering at Escola Politécnica and at the Graduate Program in Mechanical Engineering at COPPE, at the Federal University of Rio de Janeiro. He was also Associate Professor at the University of the State of Rio de Janeiro, working in the Department of Mechanical Engineering and Energy and in the postgraduate course in Computational Modeling at the Polytechnic Institute (IPRJ), Nova Friburgo Regional Campus, RJ, for more than 12 years ( 2006-2018). He works in the area of Dynamics, Acoustics and Vibrations. He has six books published in the area of Dynamics, two of them abroad, and two books published in the area of Acoustics. He is an emeritus and founding member of the Brazilian Association of Mechanical Sciences (ABCM) and a founding member of the Brazilian Acoustic Society (SOBRAC), as well as a member of the Acoustical Society of America (ASA). He has been a CNPq Research Productivity Fellow (PQ) since 1990 and was a Procientist at UERJ. He was the creator and Coordinator of the Laboratory of Instrumentation in Dynamics, Acoustics and Vibrations (LIDAV) at IPRJ from 2007 to 2018. He is currently Visiting Full Professor at the Graduate Program in Civil Engineering at the Federal University of Santa Maria. His main current research lines are: vibroacoustics and identification of sound sources; acoustic virtual reality and human head-related transfer function modeling; use of rooms and acoustic virtual reality; numerical simulation of acoustic field in rooms; acoustic quality of classrooms; acoustic evaluation of concert halls; identification of structural damage from acoustic wave propagation and vibration tests; and inverse problems in dynamics, acoustics and vibrations. He is the creator and developer of computer code for simulation and auralization in rooms (RAIOS 7).

 

 

Afternoon - 08/28/2022
1:30pm - 5:30pm

Mini-course 06
Believing in the competence of acoustic measurements (ISO/IEC NBR 17025)

Many of the existing acoustic problems are solved after analyzing the measurement results. Laboratories in charge of carrying out the measurements have, in the accreditation, an opportunity to prove their metrological competence. The advantages that laboratories have when choosing to be accredited by a neutral body, such as Inmetro's General Accreditation Coordination (CGCRE) will be presented. The general competence requirements of laboratories contained in the international standard ISO/IEC NBR 17025 will be presented, with particular emphasis on acoustics. The steps of an accreditation process by CGCRE will be exemplified. Issues related to the structures of accredited laboratories and the volumes of documentation control necessary to maintain accreditation will be discussed, in order to demystify a common idea that accreditation is only possible for laboratories managed by large companies.

Speaker: Paulo Massarani - INMETRO
Mechanical engineer with a master's degree and a doctorate in science from the mechanical engineering program at COPPE/UFRJ. He has served in the acoustic testing laboratory since 1997, and is currently the head of the laboratory. Holder of the deliberative council of Sobrac in the current management and member of the Special Study Commission of Acoustics ABNT/CEE 196. He has worked as a technical evaluator of CGCRE for 20 years, composing evaluation teams of testing laboratories in accreditation processes by ISO/IEC NBR 17025.

 

Mini-course 07
Acoustics in offices

Productivity is related to the acoustic condition. It's time to understand and adapt our work environment, whether it's a panoramic office or private rooms. Most of the acoustic problems related to distractions by other people's conversations and lack of privacy can be avoided from the design stage. Come and see these recommendations and improve your technical vocabulary.

Speaker: Felipe Barreiros Paim - AUDIUM
Architect and Urban Planner, graduated from UFBA, with exchange program at FAUP; Postgraduate Degree in Acoustic and Environmental Engineering at FDTE-USP in partnership with IST in Lisbon; Post-Graduation in Environmental Comfort and Sustainability by UNIME; Professor of the Architecture and Urbanism course at UCSAL; Coordinator of the Graduate Program in Environmental Comfort and Sustainability at UCSAL; Advisor of the PRÁXIS Research Group at UCSAL; Project Leader at AUDIUM company.

 

Mini-course 08
Application of the new version of NBR 10.151/2019 standard

Acoustics in inhabited areas refers to noise pollution in large urban centers and rural areas. The ABNT NBR 10151 standard defines references for the control and sound planning of such inhabited areas. Sound pressure levels must be measured in accordance with the standardized procedure using established methods and specific and calibrated equipment. The analysis of the data and the way of writing the reports were also revised in this new version of the standard published in 2019, which is broader and more complex. We have to be aware that this regulation is essential for people's quality of life, bearing in mind that NBR 10151 is the basis for several municipal laws that determine how establishments should behave in the face of noise pollution and how the government should diagnose the world's second biggest environmental problem.

 

Speaker: Pablo Giordani Serrano - PORTAL ACÚSTICA
PhD in Engineering and Environment from the University of Southampton and Master in Mechanical Engineering on Computational Aeroacoustics at UFSC. Member of the Special Acoustics Study Committee ABNT/CEE 196 and Director of Portal Acústica, working as an acoustic consultant, entrepreneur, editor and teacher throughout the national territory.

 

Mini-course 09
Noise Control

Basic concepts of noise generation. Noise levels and spectra. Weighting curve A. Acceptable noise levels. Ear protectors. Acoustic materials. Sound absorption panels. Soundproofing. Noise control by enclosure. Acoustic barriers. Practical examples. Notions of noise control at the source. 

 

Speakers: Arcanjo Lenzi - UFSC
Mechanical Engineer from UFSC, Master's and Doctorate from the Institute of Sound and Vibration Research (ISVR), University of Southampton, Full Professor of the Department of Mechanical Engineering at UFSC, Professor of the Graduate Program in Mechanical Engineering at UFSC. Develops research in the areas of machine noise, Statistical Energy Analysis (SEA), noise and vibration control applied to refrigeration systems and aeronautical panels.