Level crossing — This article is about at grade intersections between railway and road. For where two rail lines cross, see level junction. For a type of nuclear receptor (RXR), see Retinoid X receptor. A level crossing at Chertsey, England, as the barriers rise … Wikipedia
Cosmic noise — and galactic radio noise is random noise that originates outside the Earth s atmosphere. It can be detected and heard on radio receivers. Elaboration Cosmic noise characteristics are similar to those of thermal noise. Cosmic noise is experienced… … Wikipedia
Additive white Gaussian noise — Explanation= In communications, the additive white Gaussian noise (AWGN) channel model is one in which the only impairment is the linear addition of wideband or white noise with a constant spectral density (expressed as watts per hertz of… … Wikipedia
Aircraft noise — is defined as sound produced by any aircraft or its components, during various phases of a flight, on the ground while parked such as auxiliary power units, while taxiing, on run up from propeller and jet exhaust, during take off, underneath and… … Wikipedia
ITU-R 468 noise weighting — The ITU R 468 weighting curve (originally defined in CCIR recommendation 468) is widely used when measuring noise in audio systems, especially in the UK, Europe, and former countries of the British Empire such as Australia and South Africa. It is … Wikipedia
Current sea level rise — This article is about the current and future rise in sea level associated with global warming. For sea level changes in Earth s history, see Sea level#Changes through geologic time. Sea level measurements from 23 long tide gauge records in… … Wikipedia
Art of Noise — Infobox musical artist Name = Art of Noise Img capt = Img size = Landscape = Background = group or band Alias = Origin = London, England Genre = Synthpop, Avant garde, Ambient, New Wave Years active = 1983 1990, 1998 2000 Label = ZTT China… … Wikipedia
ultrasonics — /ul treuh son iks/, n. (used with a sing. v.) the branch of science that deals with the effects of sound waves above human perception. [1930 35; see ULTRASONIC, ICS] * * * Vibrational or stress waves in elastic media that have a frequency above… … Universalium
Gramophone record — A 12 inch (30 cm) 33⅓ rpm record (left), a 7 inch 45 rpm record (right), and a CD (above) A gramophone record, commonly known as a phonograph record (in American English), vinyl record (in reference to vinyl, the material most commonly used after … Wikipedia
Headphones — For other uses, see Headphones (disambiguation). Sennheiser HD555 headphones, used in audio production environments … Wikipedia
Tinnitus — Infobox Disease Name = Tinnitus Caption = DiseasesDB = 27662 ICD10 = ICD10|H|93|1|h|90 ICD9 = ICD9|388.3 ICDO = OMIM = MedlinePlus = 003043 eMedicineSubj = ent eMedicineTopic = 235 MeshID = D014012Tinnitus (pronEng|tɪˈnaɪtəs or IPA|/ˈtɪnɪtəs/,… … Wikipedia