**3. Conclusion**

Industrial facilities and most modes of transport are sources of high-intensity noise, the spectrum of which is dominated by low-frequency infrasonic frequencies. The close physical nature of these ranges contributes to the propagation of such noise with low attenuation, and they have good penetrating power, so most noise protection devices are ineffective. High (more than 100 dBA) noise levels at workplaces of industrial facilities and transport require measurements in the infrasound range as well.

Studies of low-frequency acoustic oscillations as a factor in the production environment have not been completed. Their "targets" are the central nervous and autonomic nervous systems, auditory and vestibular analyzers, respiratory organs, etc. With prolonged exposure, they contribute to the development of occupational diseases. The simultaneous action of low-frequency noise and infrasound (this situation is typical for industrial conditions and vehicles) leads to an aggravation of infrasound pathology, which requires more careful medical monitoring of people working in such conditions, and improvement of means and methods of protection against industrial and transport noise.
