The task of protection against noise and vibration is to provide students with necessary knowledge in the field of: laws of physics related to the phenomena of noise and vibrations, theoretical basis of acoustics and vibration modes, methods of experimental determination and measurement of sound pressure, flux of sound energy and acceleration, frequency analysis of experimental data, identification of detrimental influence of noise and vibrations on man, legislation in this area as well as techniques used in solving the problems associated with noise and vibrations in the environment. The targeted outcome to be achieved by the course “Protection against noise and vibrations” is that students gain the necessary practical and theoretical skills which enable them to perform independently: quantification of the level of noise and vibrations, application of the methods of their control, as well as solving the problems associates with noise and vibrations in working and living environments.
Theoretical and practical study:
Definitions of the sound, sound wave, and noise; spreading of sound wave and sound field. Definitions of the sound pressure, sound intensity, and sound power. Fundamentals of physiological acoustics; equivalent levels of audibility; subjective feeling of sound pressure; relative volume; sound and phone levels. The physiology of sound receiving organs; impairment and disruption of normal perception of sound. Definition of the noise of technical systems and standard methods for experimental determination of its levels. Definition of communal noise in the working and living environments (equivalent levels, etc.) and experimental determination of its level. Legislation in the field of noise of technical systems; the ways of solving problems of noise in industry; the way of solving the problems associated with environmental noise and pollution by noise.
Theoretical basis of vibrations; the concept of degree of freedom; system vibration and single-degree of freedom; concept of power system frequency; damping and modes of oscillation; system response to stimuli and experimental methods determination of system response. A harmonized system of declaring vibration levels of hands, arms, and human body. The permitted levels of vibrations and the corresponding legislation. The methods of reducing vibrations in order to reduce the level of human exposure to harmful vibrations.
Study program: Engineering Environment,
Ph.D Vladimir Šinik, assistant professor
Ph.D Ljiljana Radovanović, assistant professor
Ph.D Vjekoslav Sajfert, full time professor
1. Husnija Kurtovic, The technical acoustics, Scientific Book , Belgrade 1990
2. Den Hartog, Vibrations in Mechanical Engineering, Building Book , Belgrade 1972