audio attenuator!

audio attenuator

Comprehensive Analysis

1) "Audio" -- As to audio attenuator 1au·dio Pronunciation: 'o-dE-"O Function: adjective Etymology: audio- 1 : of or relating to acoustic, mechanical, or electrical frequencies corresponding to normally audible sound waves which are of frequencies approximately from 15 to 20,000 hertz 2 a : of or relating to sound or its reproduction and especially high-fidelity reproduction b : relating to or used in the transmission or reception of sound -- compare VIDEO c : of, relating to, or utilizing recorded sound Pronunciation Symbols A U.S. Postage Stamp commemorating one hundred years of sound recording. Sound recording and reproduction is the electrical or mechanical inscription and re-creation of sound waves, usually used for the voice or for music. The two main classes of sound recording technology are analog recording and digital recording. 1 The cylinder phonograph 2 The disc 3 Electrical recording 4 Other recording formats 5 Magnetic tape 6 Stereo and Hi-fi 7 The Fifties and beyond 8 Digital recording 9 See also 10 Notes The first practical sound recording and reproduction device was the mechanical cylinder phonograph, invented by Thomas Edison in 1877 and patented in 1878, and in some ways resembled the phonoautograph patented by Edouard-Leon Scott de Martinville in 1857. The invention soon spread across the globe and over the next two decades the commercial recording, distribution and sale of sound recordings became a growing new international industry, with the most popular titles selling millions of units by the early 1900s. The development of mass-production techniques enabled cylinder recordings to become a major new consumer item in industrial countries and the cylinder was the main consumer format from the late 1880s until around 1910. The next major technical development was the invention of the gramophone disc, generally credited to Emile Berliner and commercially introduced in the United States in 1889. Discs were easier to manufacture, transport and store, and they had the additional benefit of being louder (marginally) than cylinders, which by necessity, were single-sided. Sales of the Gramophone record overtook the cylinder ca. 1910, and by the end of World War I the disc had become the dominant commercial recording format. In various permutations, t..." 2) "Attenuator" -- As to audio attenuator at·ten·u·a·tor Pronunciation: -y&-"wA-t&r, -yü-"A- Function: noun : a device for attenuating; especially : one for reducing the amplitude of an electrical signal without appreciable distortion Pronunciation Symbols An attenuator is an electronic device that reduces the amplitude or power of a signal without appreciably distorting its waveform. Attenuators are usually passive devices made from resistors. The degree of attenuation may be fixed, continuously adjustable, or incrementally adjustable. 1 Low level attenuators 2 Power attenuators 3 Guitar amplifier attenuators 4 External links An attenuator is effectively the opposite of an amplifier, though the two work by different methods. While an amplifier provides gain, an attenuator provides loss, or negative gain. A fixed electrical attenuator is often called a pad, especially in telephony and audio engineering. The input and output impedances of an electrical attenuator are usually matched to the impedances of the signal source and load, respectively. A line-level attenuator in the preamp or a power attenuator after the power amplifier uses electrical resistance to reduce the amplitude of the signal that reaches the speaker, reducing the volume of the output. A line-level attenuator has lower power handling, such as a 1/2-watt potentiometer. A power attenuator has higher power handling, such as 10 or 50 watts. In audio electronics, attenuators are used as a dummy load by sending all of the power to the resistor and none to the speaker, in order to silence or reduce the output volume of an audio amplifier (for example, a guitar amplifier). Silencing an amplifier is useful for biasing the positive and negative signal crossover, for running bench tests such as measuring the amplifier's maximum output wattage, and for adding line-level effects between a guitar amplifier and a guitar speaker. One of the main purposes of guitar amplifiers is to provide various shades of power-tube distortion. Power attenuators for guitar are used for signal processing to obtain musically useful power-tube distortion at controlled volume levels. Guitar amp power attenuator FAQ ..." 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