- atmospheric radio noise
- Техника: атмосферные радиопомехи, атмосферный радиошум
Универсальный англо-русский словарь. Академик.ру. 2011.
atmospheric radio noise
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radio noise — noun static at radio wavelengths (Freq. 2) • Hypernyms: ↑static, ↑atmospherics, ↑atmospheric static * * * radio noise, radio emission, especially from a radio star or pulsar, characterized by random or erratic changes of amplitude or frequency … Useful english dictionary
radio noise — A noise or a disturbance in radio wave reception that may be caused by poor quality components, bad contacts, small thermal motion within the sets that appears as a hissing noise in speakers and grass on radar screens, and external atmospheric… … Aviation dictionary
Atmospheric noise — is radio noise caused by natural atmospheric processes, primarily lightning discharges in thunderstorms.Atmospheric noise is mainly caused by cloud to ground flashes as the current is much stronger than for cloud to cloud flashes. On a worldwide… … Wikipedia
Atmospheric diffraction — is manifested in the following principal ways:* Fourier optics is the bending of light rays in the atmosphere, which results in remarkable visual displays of astronomical objects, such as depictions on this page.* Radio wave diffraction is the… … Wikipedia
Radio jamming — is the (usually deliberate) transmission of radio signals that disrupt communications by decreasing the signal to noise ratio. Unintentional jamming occurs when an operator transmits on a busy frequency without checking that it is in use first,… … Wikipedia
Noise figure — (NF) is a measure of degradation of the signal to noise ratio (SNR), caused by components in a radio frequency (RF) signal chain. The noise figure is defined as the ratio of the output noise power of a device to the portion thereof attributable… … Wikipedia
Noise shaping — is a technique typically used in digital audio, image, and video processing, usually in combination with dithering, as part of the process of quantization or bit depth reduction of a digital signal. Its purpose is to increase the apparent signal… … Wikipedia
Noise (audio) — Noise in audio, recording, and broadcast systems refers to the residual low level sound (usually hiss and hum) that is heard in quiet periods of a programme. In audio engineering, it can refer either to the acoustic noise from loudspeakers, or to … Wikipedia
Noise measurement — is carried out in various fields. In acoustics, it can be for the purpose of measuring environmental noise, or part of a test procedure using white noise, or some other specialised form of test signal. In electronics it relates to the sensitivity … Wikipedia
Noise (radio) — In radio reception, noise is the superposition of white noise (also called static ) and other disturbing influences on the signal, caused either by thermal noise and other electronic noise from receiver input circuits or by interference from… … Wikipedia
Noise floor — This article is about physics term. For the Bright Eyes album, see Noise Floor (Rarities: 1998 2005). In signal theory, the noise floor is the measure of the signal created from the sum of all the noise sources and unwanted signals within a… … Wikipedia
