Electrophone

Electrophone (from the Greek words "electro" and "phone" - sound) is a device for playing recordings (often in the old manner the elec- tron is called a record player). The electrophone consists of a mechanism for rotating a record, a pickup, a low-frequency amplifier, powered by batteries or an electrical network, a dynamic speaker head or an external speaker.

Electrophone is a device for playing recordings

The prototype of an electrophone for recording and reproducing sound was a phonograph invented in 1877 by T.A. Edison. In this apparatus, sound vibrations set in motion a membrane with a needle. She squeezed a groove on the rotating wax cushion, the depth of which changed according to the sound vibrations. To reproduce the sound, a needle was placed in the groove again. When rotating the roller, it swung the membrane, which radiated sound vibrations. Wax cushion with a record existed in a single copy and did not lend itself to replication. This was the main drawback of the phonograph.

German engineer E. Berliner brought the time of the appearance of the electrophone. He suggested recording the sound not on rollers, but on disks, from which it was easy to get metal copies - matrices. They were then used to press plates from celluloid or resin. In a new sound reproducing apparatus-gramophone-a spring mechanical motor rotated the disc with a plate, and a weak oscillation of the needle running along the winding sound track of the plate, the membrane (pickup) converted into sound. The principle of mechanical recording and sound reproduction has remained almost unchanged.

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