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VLF very low frequency - translation to English
![Timing diagram of a frequency-shift keyed 18.1 kHz VLF signal, picked up using a small [[loop antenna]] and a sound card. The Morse code says "..33376.."; the vertical stripes are distant lightning strikes.](https://commons.wikimedia.org/wiki/Special:FilePath/VLF 18.1 kHz spectrogram.svg?width=200 "Timing diagram of a frequency-shift keyed 18.1 kHz VLF signal, picked up using a small [[loop antenna]] and a sound card. The Morse code says \"..33376..\"; the vertical stripes are distant lightning strikes.")
общая лексика
very low frequency
очень низкие частоты, ОНЧ
радиочастоты диапазона от 3 до 30 кГц
Смотрите также
существительное
общая лексика
очень низкая частота
синоним
общая лексика
очень низкая частота
ОНЧ
3-30 кГц (соответствует диапазону мириаметровых волн)
Definition
Wikipedia
Very low frequency or VLF is the ITU designation for radio frequencies (RF) in the range of 3–30 kHz, corresponding to wavelengths from 100 to 10 km, respectively. The band is also known as the myriameter band or myriameter wave as the wavelengths range from one to ten myriameters (an obsolete metric unit equal to 10 kilometers). Due to its limited bandwidth, audio (voice) transmission is highly impractical in this band, and therefore only low data rate coded signals are used. The VLF band is used for a few radio navigation services, government time radio stations (broadcasting time signals to set radio clocks) and for secure military communication. Since VLF waves can penetrate at least 40 meters (131 ft) into saltwater, they are used for military communication with submarines.
