Study on mechanics of bodies under the action of sound pollution in industrial halls. Part I: Setting away from local sources

7th International Conference on Advanced Concepts in Mechanical Engineering

Lpuan, I.L.^1 ; Arghir, M.^1

Department of Mechanical Engineering Systems, Technical University of Cluj-Napoca, Faculty of Building Machines, Cluj-Napoca, Romania^1

关键词: Acoustic pressures;    Frequency of operation;    Industrial parks;    Industrial product;    Measurements of;    Pollution level;    Sound pollution;    Stationary waves;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/147/1/012093/pdf
DOI  :  10.1088/1757-899X/147/1/012093

来源: IOP

【 摘 要 】

When they are generated in confined spaces (halls, meeting rooms, theatre, concert, lecture, etc.) the sounds of suffering typical wave phenomena: absorption, reflection, refraction, production of stationary wave phenomenon, beatings, diffraction. In this work, it is taking into account all these phenomena of sounds propagation in given space. Within the framework of the given research is a study in industrial park "Teraplast" from Bistria-Nsud county. This is industrial products for pvc constructions. From the submissions made to the workshops of processing industrial park "Teraplast" has been found, that noise is produced mainly in the power pumps hall. The registrations were made during a normal working days. The recorders made, for one minute, with recorder type NL32 made by Japanese society RION, in the pump's hall 12 positions, and they were introduced in a high-capacity computer. Signal processing has been made by the use of Fourier series. Graphs resulting from recorders were processed in Matlab. By analyzing the results of measurements of pollution levels in the pump room from "Teraplast" proves the fact that at any frequency of operation of pump maximum acoustic pressure exceeds the admisible pressure inside the halls and is needed to reduce it in industrial application.