Sound and noise

Abstract: Noise is undoubtedly part of our lives, so there is a growing concern to develop better acoustic conditioning and insulation conditions in our architecture. In recent years, theories and mathematical models that help to predict the acoustic behavior of some materials have been developed; and due to the growing trend in the use of new raw materials, the market is increasing in the use of alternative materials. The main objective of this work is to compile a theoretical and mathematical basis that let use and develop mathematical models, with the motivation that in future work these models will be used as a tool to support different facets of architectural acoustics. This work was divided into three chapters. The first focuses on reviewing the particularities of the structure, the interstices and the manufacturing methods of different types of absorbent materials. The second focuses in the processes and methods used for the characterization of the acoustic properties of materials. The third chapter focuses on the application and development of mathematical prediction models. The conclusions of this work show tables of some mathematical models that best fit the different materials and the percentage of error obtained with the materials evaluated. Although the number of materials evaluated is insufficient to dictate an absolute sentence on favor or against an specific model, this work gives us a clear vision of the similarity that we could expect between the absorption get in the laboratory, and the absorption calculated by the correctly chosen Model of prediction. Some of the possible applications that these prediction models have in different facets of architectural acoustics are also mentioned, such as in the digital modeling of acoustic-architectural spaces, the acoustic conditioning of spaces, the improvement and the development of new materials.

https://oa.upm.es/55263/