Navegando por Orientadores "MELO, Gustavo da Silva Vieira de"

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Acesso aberto (Open Access)
Avaliação dos níveis de ruído e das soluções arquitetônicas adotadas em ambientes das unidades de urgência e emergência no município de Belém-PA
(Universidade Federal do Pará, 2013-08-30) SOUZA, Mirza Mello; MELO, Gustavo da Silva Vieira de; http://lattes.cnpq.br/8850986817571748
In large urban centers can be seen that the noise level is so high that it threatens the physical and psychological integrity of the inhabitants. However, it is observed that much of the noise in the hospital environment is originated from within hospital, and one of the main sources of noise in the units is caused by the communication by hospital’s staff and the equipment. The noise-induced hearing loss (NIHL) is one of the consequences that loud noise can affect health, among other damage. Thus, the hospital environment should be calm and quiet becomes noisy and stressful environment, increasing anxiety and pain perception in the patient, reducing sleep and extending convalescence. Objective: Evaluate the acoustics of the main environments in units urgency and emergency in the city of Belém, Pará State, Brazil. Check the adequacy of health standards and technical regulations, with the simulation of a pilot ambience validated using the ODEON software and propose virtual solutions from conditioning acoustic. Material and Methods: we used the equipment Sound Level Meter with calibration certificate of the Brazilian Calibration Network (RBC) for measurement of NPS during daytime and nighttime, in accordance with the NBR 10.151 (2000), and the observation and identifying sources of noise environments. Results: The values obtained during the measurements of NPS in environments Hospital were 58 dB(A) to 70 dB(A) and Hospital B were 62 dB(A) to 70 dB(A). The pilot environment was selected according to the results and with the residence time of the health care team and patients. Conclusion: was developed the computational model validated the pilot environment, generating a proposed model with architectural interventions aimed at the acoustic comfort of the health care team and patients. The environments surveyed did not have noise levels above 85 dB (A), proving that there is no risk to occupational health teams. However, the high levels of noise are responsible for stimulating or even trigger a variety of symptoms that affect the working capacity of the health team, in addition to increasing convalescence and impair the recovery of patients.
Acesso aberto (Open Access)
Desenvolvimento e caracterização acústica de painéis multicamadas unifibra, multifibras e mesclados, fabricados a partir de fibras vegetais
(Universidade Federal do Pará, 2009-12-01) BASTOS, Leopoldo Pacheco; MELO, Gustavo da Silva Vieira de; http://lattes.cnpq.br/8850986817571748
In a time when high noise levels are part of people’s daily lives, the search for noise control is not only evident, but providential. Currently, noise pollution, to a worldwide level, is not more serious than air and water pollution only. In Brazil, the situation is not different because it is estimated that more than 15 million people have some kind of hearing loss degree due to this environmental problem. Acoustic devices such as panels, barriers, etc., when of high efficiency, generally, are of difficult acquisition due to high costs, turning, in many cases, their use impracticable, mainly for limited budget small-sized companies. Thus, alternative solutions, starting with new acoustic materials that are less costly and have satisfactory performance, emerge as a great option. Considering the global environmental trends, the use of vegetable fibers is a great opportunity to aggregate value, and technological development for agricultural producing countries, like Brazil. Beyond that, such fibers are easy to get, exist in abundance, are non toxic and derive from renewable sources. This work will present the methodology of development of panels made from vegetable fibers (açaí, coconut, sisal and palm) and binding agent based on acrylate and water, as well as the methodology used to characterize them acoustically on a scale model reverberant chamber, based on ISO 354/1999. These panels are made of pressed layers of fibers interspersed with layers of binding agent. The fibers are extracted, washed, dried, and treated when necessary, while the binding agent is obtained commercially. The panels sound absorption data are obtained through a four channel frequency analyzer using the noise interruption method. Comparison of results between alternative and conventional material based panels allows to the conclusion that the acoustical performance shown by some newly developed panels are very satisfactory, since their sound absorption coefficients were compatible, and in some cases, higher to those presented by conventional materials in a given frequency range. Finally, a numerical-experimental comparison is performed in order to evaluate the influence of sisal absorbing panels over the acoustics characteristics of a small classroom.
Acesso aberto (Open Access)
Influência do ruído de tráfego em edifícios e proposta de solução desenvolvida com auxílio de modelos numéricos
(Universidade Federal do Pará, 2011-05-27) GUIMARAES, Erick Van Casseb; MELO, Gustavo da Silva Vieira de; http://lattes.cnpq.br/8850986817571748
In Brazil, the number of houses and apartments that suffer the influence of noise pollution is quite large. Currently, this question gained important local attention when Belém-PA was elected the “National Capital of Noise” for several years in a row, according to data obtained by the IBGE. Among the most common types of noise pollution, the biggest complaint of society is regarding traffic noise, which is inherent to the daily life of any great city. While the traffic noise concerns increase, so does the preoccupation with a degree of discomfort from the population, justifying the development of means to quantify and reduce such discomfort beyond the means of regulations for this situation by Brazilian standards. Therefore, the condition of traffic noise, while a principal agent of annoyance for the population in which it refers to the noise pollution, it comes to justify the necessity to realize a study that aims at the development of elements of construction by means of new geometrics and composition of existing materials that minimize the penetration of traffic noise to the internal environments of these constructions. So, this work presents the results of studies of the acoustic behavior in situated constructions next to roads of great flow of vehicles which suffer interferences caused by the generation of traffic noise. So far, there were measures carried out in the field of a 25 story building in advanced stages of construction and was chosen as the subject for this study, which represents a numerical modeling of this building with the help of the software ODEON.
Acesso aberto (Open Access)
Ruído e configuração espacial urbana: estudo de caso em Belém-PA
(Universidade Federal do Pará, 2012-11-23) MOURA, Vânia Raposo de; MELO, Gustavo da Silva Vieira de; http://lattes.cnpq.br/8850986817571748
A large portion of the population that lives in urban centers has already suffered or is suffering from problems caused by urban noise, especially due to, among other factors, the proximity of roads of intense traffic of vehicles. Studies of several areas of knowledge are presenting possible harms caused to people as a consequence of a long exposure to high noise levels. Under this point of view, noise has become a social problem, implying the necessity to make its control to improve the quality of life for citizens. Lately, this control has been done mainly by private initiatives, through the internal ambient sound insulation. Regarding the external environment, few measures were taken. Studies about this reveal conflicts between the urban guidelines for the urban development, land use and occupation and the acoustic comfort. The main objective of this work is to study the interactions between urban noise (especially regarding traffic noise) and urban space configuration, using as experimental field an area of Marco neighborhood, in Belém-PA, near Almirante Barroso Avenue. For this, a methodology was created based on standards and theories that approach this theme and makes it possible to obtain built mass characteristic indexes (roughness, porosity, concentration and porosity). The comparison of these indexes with sound levels obtained through “in loco” collected data (using a sound pressure level meter), allow the identification of the urban form physical characteristics that influence external sound environment and that can serve as subsidies to the planning and design of the cities, preventing the formation of extremely unhealthy sound areas.