Sources of Ultrasound
3.3. Sources of ultrasound are all types of ultrasonic technological equipment, ultrasonic devices and apparatus for industrial, medical, and household use that generate ultrasonic vibrations in the frequency range from 18 kHz to 100 MHz and higher. Equipment is also considered a source of ultrasound if ultrasonic vibrations occur as an accompanying factor during its operation
Source: "SanPiN 2.2.4/2.1.8.582-96. 2.2.4. Physical factors of the production environment. 2.1.8. Physical factors of the surrounding natural environment. Hygienic requirements for work with sources of airborne and contact ultrasound of industrial, medical, and household use. Sanitary rules and norms" (approved by the Order of the Russian State Committee for Sanitary and Epidemiological Surveillance dated October 31, 1996 No. 51)
Понятие «источники ультразвука» мужского рода.
| Падеж | Единственное число | Множественное число |
|---|---|---|
| Р | источника ультразвука | источников ультразвука |
| Д | источнику ультразвука | источникам ультразвука |
| В | источник ультразвука | источники ультразвука |
| Т | источником ультразвука | источниками ультразвука |
| П | источнике ультразвука | источниках ультразвука |