Abstract. Noise pollution has become a primary concern, as it often disrupts a person’s activities or lifestyle balance. The work is devoted to the analysis of the regulatory framework in the field of the introduction of standards for the maximum permissible levels of sound and ultrasonic signals. The relevance of the work is related to the lack of a comprehensive study of the issues of regulatory support for the measurement of ultrasonic signals, as well as the procedure for identifying sources of ultrasound dangerous to human health. The subject of the study is the regulatory framework and standards for measuring the levels of sound and ultrasonic signals. Ultrasound processing is attracting more and more attention from people, as ultrasound technology can provide a flexible “green” alternative for energy-efficient processes, but powerful sources of ultrasound are harmful to human health. They are especially dangerous because a person may not know or feel about the effects of ultrasound sources on him. The objectives of the study were to identify differences in acceptable signal levels and the measurement features of these levels. The purpose of the work is to determine the completeness of compliance of Kazakhstani regulatory documents with the International Standard. The maximum permissible standards of sound and ultrasonic pressure, legally established in a number of countries, are given. Millions of people around the world are exposed to potentially dangerous levels of noise, and therefore there is an urgent global need for legislation to adequately protect workers’ hearing health. Attention is drawn to the wide variation in the levels of established norms and the reasons leading to the ambiguity of these values. The fact that there are no regulatory and methodological documents on the identification of sources of powerful ultrasonic signals, whose increased danger lies in their inaudibility to humans, is noted. It is concluded that it is necessary to study ultrasound levels in the cabin and cabin of jet aircraft.

Keywords: acoustics, sound, sound pressure, norm, danger, airplane, standard, ultrasound.