Rus Articles Journal

How there was a sound recording?

Somehow time I worked with new model of the phone. The mood was just remarkable, and I between times started singing. Did not remember that as the needle soldered to phone diaphragm stuck into this moment to me in a finger - so this thin steel plate began to tremble under the influence of my voice. And then I became thoughtful: whether it is possible as - nibud to write down these fluctuations of a needle? For example, on a plate. Logically, if after record to carry out by a needle on the paths done earlier - it has to reproduce the same sound!

So Thomas Edison, the inventor of the first sound recording device - the phonograph created in 1877 described the moment of the inspiration. It was very similar to a street organ - the cylinder covered with a tin foil was the cornerstone of a phonograph. The sound on it registered by means of a membrane and the needle which is rigidly attached to it squeezing out on tin of a groove of different depth. Such record could not brag of special quality and durability.

The record player of German Emil Berliner created 11 years later could write down with higher quality. As the carrier in it the glass plates covered with paraffin and soot on which after record the varnish coat was applied were used. by

But all - the first-ever really replaceable carrier of a sound recording it is worth recognizing a gramophone record from celluloid. For its production began to use all the known vinyl pitch. It considerably reduced the price of them, and audio recordings, as they say, stepped in masses.

Nearly half a century seemed that it is better than these plates and there is nothing to think up. But in 1964 the Philips company develops the cartridges operating on the basis of the magnetized film (Though the principle of magnetic record of a sound was invented even at the time of creation of a phonograph. In 1888, the first devices, having all signs of the classical tape recorder were also created: magnetic data carrier, the mechanism for its giving and a magnetic head).

Truly it is possible to call this event epoch-making for music lovers. With emergence a compact - cartridges anyone had an opportunity to independently write down what is pleasant, and then to listen to it where there is a wish. The compact - the cartridge and remains today the widespread audiocarrier, but it death it is inevitable. Of course, not without fight - in 1987 an attempt to seriously improve quality of cassette record was made, having made it digital. But any cartridge has one weak place - consecutive access to data. Therefore sooner or later the magnetic sound recording will disappear.

The principle of a data recording is in many respects similar to CD on that which was applied to production of phonograph records. Unless record on the rotating disk is done here not by a needle, but a laser beam under the influence of which on a polymeric basis deepenings of different length - a hole are formed. But so write down only the first disk in party. Copies receive pressing from a pig. One minus of CD - information on such disk cannot be erased or rewritten. Therefore in 1992 the Sony company developed pass - a disk on which magnetooptical record was used. Having all advantages of CD, such disks could sustain up to one million cycles of rewriting, and at the same time quality of sounding did not change at all. But too high price for the license of Sony for production pass - disks became the reason for which other companies decided not to hurry with its purchase. Especially as on the horizon the " technology appeared; reusable disks.

The first device for individual rewriting of CD was created in 1989 by the Hewlett company - Packard for own needs and had dimensions of the two-chamber refrigerator. At the beginning of 90 - x FujiFilm began a mass production of the rewritten disks and the equipment for this purpose (this technology received the name CD - Recordable - CD - R). In the middle of 90 - x Hewlett - Packard offered the technology to a repeated optical recording of CD - Rewritable - CD - RW. On these disks information could be written down, erased, and then to write down again many times. Soon other companies offered

the similar CD+R, CD+RW formats Essentially they from each other differed in nothing. Just each producer of sound recording equipment tried to stake out to himself the place in the market of carriers of a sound, from - for what the buyer as some formats with each other not " often suffered; were in contact . That is, for example, on CD player - RW it was impossible to listen to the disks CD - R. The relative truce came only with the advent of DVD.

The multilayered bilateral disks DVD which appeared in 1997 at the end of the last century became strong contenders of usual disks. Externally they are at each other very similar, however DVD allows to work at higher speeds, so, quality of reproduction at it is better, and volume at DVD at least in 6 times more the most capacious of former formats. Therefore on such disks with ease it is possible to write down not only music, but also video.

As it is known perfection does not have a limit. Meet: the Blue format - ray Dis which

thanks to at record of the blue laser (instead of red), to pozvolyaetzapisat to 50 gigabytes of information. " option; blue " laser; - Advanced Optical Disc technology. Only 20 gigabytes of information, but for work with it usual DVD - the equipment (with Blut - ray Dis it is impossible) register in such disk.

The competitor of DVD - the cartridge D - VHS. She as well as Blue - ray, allows to place in itself up to 50 gigabytes of information, but at the same time does not demand any fancy equipment for viewing Is valid

, perfection does not have a limit