- equal noise contour
- контур равного уровня шума
Англо-русский словарь по гражданской авиации. — М.: Скорпион-Россия. В.П. Марасанов. 1996.
equal noise contour
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Equal-loudness contour — An equal loudness contour is a measure of sound pressure (dB SPL), over the frequency spectrum, for which a listener perceives a constant loudness when presented with pure steady tones. The unit of measurement for loudness levels is the phon, and … Wikipedia
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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 weighting — A noise weighting is a specific amplitude vs. frequency characteristic that is designed to allow subjectively valid measurement of noise. It emphasises the parts of the spectrum that are most important. Usually, noise means audible noise, in… … Wikipedia
Contour line — This article is about lines of equal value in maps and diagrams. For more meanings of the word contour , see Contour (disambiguation). The bottom part of the diagram shows some contour lines with a straight line running through the location of… … Wikipedia
Colors of noise — White Pink Red (Brownian) Grey While noise is by definition derived from a random signal, it can have different characteristic statistical properties corresponding to different mappings from a source of randomness to the concrete noise. Spectral… … Wikipedia
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Audio noise measurement — is carried out when assessing the quality of audio equipment, such as is used in recording studios, broadcast studios, and in the home (Hi Fi).Noise in general refers to unwanted sound, often loud, but in audio systems it is the low level hiss or … Wikipedia
Industrial noise — is usually considered mainly from the point of view of environmental health and safety, rather than nuisance, as sustained exposure can cause permanent hearing damage. Traditionally, occupational noise has been a hazard linked to heavy industries … Wikipedia
Psychoacoustics — is the study of subjective human perception of sounds. Alternatively it can be described as the study of the psychological correlates of the physical parameters of acoustics. Background Hearing is not a purely mechanical phenomenon of wave… … Wikipedia
