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High-Com
The High Com (also as HIGH COM, both written with a thin space) noise reduction system was developed by Telefunken, Germany, in the 1970s as a high quality high compression analogue compander for audio recordings. High Com The idea of a compander for consumer devices was based on studies of a fixed two- band compander by Jürgen Wermuth of AEG-Telefunken ELA, Wolfenbüttel, developer of the Telefunken (formally abbreviated as "TEL" in professional broadcasting) four-band audio compander for professional use. In April 1974, the resulting "RUSW-200" prototype first led to the development of a sliding two-band compander by Ernst F. Schröder of Telefunken Grundlagenlaboratorium, Hannover since July 1974. However, the finally released High Com system, which was marketed by Telefunken since 1978, worked as a broadband 2:1:2 compander, achieving almost 15 dB of noise reduction for low and up to 20 dB RMS A-weighted for highe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vinyl Disc
A phonograph record (also known as a gramophone record, especially in British English) or a vinyl record (for later varieties only) is an analog signal, analog sound Recording medium, storage medium in the form of a flat disc with an inscribed, modulated spiral groove. The groove usually starts near the outside edge and ends near the center of the disc. The stored sound information is made audible by playing the record on a phonograph (or "gramophone", "turntable", or "record player"). Records have been produced in different formats with playing times ranging from a few minutes to around 30 minutes per side. For about half a century, the discs were commonly made from shellac and these records typically ran at a rotational speed of 78 rpm, giving it the nickname "78s" ("seventy-eights"). After the 1940s, "vinyl" records made from polyvinyl chloride (PVC) became standard replacing the old 78s and remain so to this day; they have since been produced in various sizes and speeds, mos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Noise Reduction System
Noise reduction is the process of removing noise from a signal. Noise reduction techniques exist for audio and images. Noise reduction algorithms may distort the signal to some degree. Noise rejection is the ability of a circuit to isolate an undesired signal component from the desired signal component, as with common-mode rejection ratio. All signal processing devices, both analog and digital, have traits that make them susceptible to noise. Noise can be random with an even frequency distribution (white noise), or frequency-dependent noise introduced by a device's mechanism or signal processing algorithms. In electronic systems, a major type of noise is ''hiss'' created by random electron motion due to thermal agitation. These agitated electrons rapidly add and subtract from the output signal and thus create detectable noise. In the case of photographic film and magnetic tape, noise (both visible and audible) is introduced due to the grain structure of the medium. In photogr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wolfenbüttel
Wolfenbüttel (; ) is a town in Lower Saxony, Germany, the administrative capital of Wolfenbüttel District Wolfenbüttel (; ) is a town in Lower Saxony, Germany, the administrative capital of Wolfenbüttel (district), Wolfenbüttel District. It is best known as the location of the internationally renowned Herzog August Library and for having the lar .... It is best known as the location of the internationally renowned Herzog August Library and for having the largest concentration of timber-framed buildings in Germany, around 1,000. It is an Landesbischof, episcopal see of the Evangelical Lutheran Church in Brunswick. It is also home to the Jägermeister distillery, houses a campus of the Ostfalia Hochschule für angewandte Wissenschaften, Ostfalia University of Applied Sciences, and the Landesmusikakademie of Lower Saxony. Geography The town center is located at an elevation of on the Oker river near the confluence with its Altenau (Oker), Altenau tributary, about south ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hannover
Hanover ( ; ; ) is the capital and largest city of the States of Germany, German state of Lower Saxony. Its population of 535,932 (2021) makes it the List of cities in Germany by population, 13th-largest city in Germany as well as the fourth-largest in northern Germany after Berlin, Hamburg and Bremen. Hanover's urban area comprises the towns of Garbsen, Langenhagen and Laatzen and has a population of about 791,000 (2018). The Hanover Region has approximately 1.16 million inhabitants (2019) and is the largest in the Hannover–Braunschweig–Göttingen–Wolfsburg Metropolitan Region, Hanover–Braunschweig–Göttingen–Wolfsburg Metropolitan Region, the List of EU metropolitan areas by GDP, 17th biggest metropolitan area by GDP in the European Union. Before it became the capital of Lower Saxony in 1946, Hanover was the capital of the Principality of Calenberg (1636–1692), the Electorate of Hanover (1692–1814), the Kingdom of Hanover (1814–1866), the Province of Hannove ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
A-weighted
A-weighting is a form of frequency weighting and the most commonly used of a family of curves defined in the International standard IEC 61672:2003 and various national standards relating to the measurement of sound pressure level. A-weighting is applied to instrument-measured sound levels in an effort to account for the relative loudness perceived by the human ear, as the ear is less sensitive to low audio frequencies. It is employed by arithmetically adding a table of values, listed by octave or third-octave bands, to the measured sound pressure levels in dB. The resulting octave band measurements are usually added (logarithmic method) to provide a single A-weighted value describing the sound; the units are written as dB(A). Other weighting sets of values – B, C, D and now Z – are discussed below. The curves were originally defined for use at different average sound levels, but A-weighting, though originally intended only for the measurement of low-level sounds (aroun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
