- lower frequencies
- нижние частоты (спектра)
English-Russian dictionary of telecommunications and their abbreviations. A.V. Alexandrov.. 2004.
lower frequencies
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infrasonic frequencies — Those frequencies of vibration lower than those in the audible range. Also called subsonic frequencies … Aviation dictionary
electromagnetic radiation — Physics. radiation consisting of electromagnetic waves, including radio waves, infrared, visible light, ultraviolet, x rays, and gamma rays. [1950 55] * * * Energy propagated through free space or through a material medium in the form of… … Universalium
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