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PHONOGRAPH
The phonograph is a device invented in 1877 for the mechanical recording and reproduction of sound. The sound vibration waveforms are recorded as corresponding physical deviations of a spiral groove engraved, etched, incised, or impressed into the surface of a rotating cylinder or disc, called a "record". To recreate the sound, the surface is similarly rotated while a playback stylus traces the groove and is therefore vibrated by it, very faintly reproducing the recorded sound. -
GRAMOPHONE
A gramophone record, is an analog sound storage medium in the form of a flat polyvinyl chloride disc with an inscribed, modulated spiral groove. The groove usually starts near the periphery and ends near the center of the disc. -
TURNTABLE
A turntable is the circular rotating platform of a phonograph (record player, gramophone, turntable, etc.), a device for playing sound recordings -
RADIO CASETTE
A cassette deck is a type of tape machine for playing and recording audio compact cassettes. Consumer electronics formerly used the term deck to distinguish them from a tape recorder, the "deck" being part of a stereo component system, while a "tape recorder" was more portable and usually had a self-contained power amplifier -
WALKMAN
Walkman is the invention as well as the brand name of Sony. It represents a portable audio player. Today, similar devices are also called "Walkman". The name describes players that have small sizes and can be carried by one anywhere. The portable player was a revolutionary device since one could take favorite music with him or her. -
DISCMAN
Discman was the product name given to Sony's first portable CD player, the D-5/D-50, which was the first on the market in 1984, and adopted for Sony's entire portable CD player line. -
MP3
Is an audio coding format for digital audio which uses a form of lossy data compression, which are data encoding methods that use inexact approximations and partial data discarding to reduce file sizes significantly, typically by a factor of 10, in comparison with a CD, yet still sound like the original uncompressed audio to most listeners. Compared to CD quality digital audio, MP3 compression commonly achieves 75 to 95% reduction in size.
