- very-high frequencies
- очень высокие частоты
English-Russian scientific dictionary. 2008.
very-high frequencies
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very high frequency — The range of radio frequencies between 30 and 300 MHz. Portions of this band, 108 to 118 MHz, are used for certain NAVAIDs (navigational aids); 118 to 136 MHz are used for civil air to ground voice communications. Other frequencies in this band… … Aviation dictionary
Very high frequency — (VHF) is the radio frequency range from 30 MHz to 300 MHz. Frequencies immediately below VHF are denoted High frequency (HF), and the next higher frequencies are known as Ultra high frequency (UHF). The frequency allocation is done by ITU. Common … Wikipedia
very low frequencies — The range of radio frequencies between 3 and 30 kHz. These are invariably ground waves, and with high power and large, efficient antennae they can provide worldwide coverage. VLF is used by Omega … Aviation dictionary
very high frequency — ver·y high fre·quen·cy || verɪ‚haɪ‚frɪËkwÉ™nsɪ range of radio frequencies between 30 and 300 megahertz … English contemporary dictionary
very high frequency — (VHF) Frequencies between 30MHz and 300MHz; television channels between 2 and 13 … IT glossary of terms, acronyms and abbreviations
High fidelity — or hi fi reproduction is a term used by home stereo listeners and home audio enthusiasts (audiophiles) to refer to high quality reproduction of sound or images that are very faithful to the original master recording. High fidelity equipment has… … Wikipedia
High frequency — (HF) radio frequencies are between 3 and 30 MHz. Also known as the decameter band or decameter wave as the wavelengths range from one to ten decameters (ten to one hundred metres). Frequencies immediately below HF are denoted Medium frequency… … Wikipedia
High-resolution transmission electron microscopy — (HRTEM) is an imaging mode of the transmission electron microscope (TEM) that allows the imaging of the crystallographic structure of a sample at an atomic scale. [cite book |title=Experimental high resolution electron microscopy |last=Spence… … Wikipedia
High frequency ventilation — is a type of mechanical ventilation that employs very high respiratory rates (>60 breaths per minute) and very small tidal volumes (usually below anatomical dead space).cite journal |author=Krishnan JA, Brower RG |title=High frequency ventilation … Wikipedia
Very Long Baseline Interferometry — (VLBI) is a type of astronomical interferometry used in radio astronomy. It allows observations of an object that are made simultaneously by many telescopes to be combined, emulating a telescope with a size equal to the maximum separation between … Wikipedia
High Speed Telegraphy — (HST) competitions challenge individuals to correctly receive and copy Morse code transmissions sent at very high speeds. It is most popular in Eastern Europe, where it is one of several activities collectively referred to as radiosport. Most… … Wikipedia
