The scientific landmarks for the development and evaluation of the effectiveness of vibration and noise absorbing materials

The mastic compositions with vibration and noise absorbing properties have been developed to reduce the level of noise and vibration in the low- and high-frequency range of the spectrum. Evaluation of the effectiveness of the developed vibration and noise absorbing mastic compositions "Vibroshtil" and "Vibroshtilmaxi" was carried out on an experimental installation by the method of free damping of plate vibrations with the determination of the decrement of vibrations. Mastic compositions are characterized by a high value of the sound absorption coefficient and the coefficient of mechanical losses in the range of operating speeds. The introduction of developed vibration and noise absorbing materials with an extended spectrum of action at the workplaces of workers will reduce the level of vibration and noise in the low- and high-frequency range of the spectrum by 7-15 dB and create safe working conditions. The main characteristic of the vibration and noise absorbing composite is the sound absorption coefficient, the value of which is in the range from 0 to 1. The main advantage of these compositions over the existing ones is the ease of manufacture, the ability to apply them to any surface by spraying or puttying.