【 Weak current College 】 and reproducing the relevant knowledge of history---Power By 【 China power house network 】

1877, Edison invented by Bell to improve telephone and in August 20, invented the phonograph, this becomes 19 century one of the greatest inventions.

In 1902, a United States person Stepney wave Rumsfeld in Kentucky Mulei city conducted the first radio broadcast.

1910-1914, Edison and finished disc gramophones and films, from then on, thin with the increasing popularity of large disc gramophones.

In 1925, the world's first player was born, 1931 United States radio company RCA trial-331/3 rpm LP tightness of sheath album. 1945-United Kingdom-card company recording 78 rpm recordings of coarse grain SP, 1948, RCA released another set of system 45 go EP.

Germany Berlin in 1935, GE developed using plastic tape tape recorder.

In 1948, John Bardeen, who invented transistor. 1954 United States Regency company produces the world's first transistor radio TR-1.

In 1950, the company launched a Sony tape recorder, then a prophecy means a phonograph maybe will eventually be the machine instead.

In 1954, RCA stereo audio that trial following the formal launch of stereo disc recorder, LP is a monaural audio, soon after launch.

In 1958, the United States developed the RCA Corporation, tabbed tape.

In 1958, China's first Pocket transistor radios in Harbin freshmen switch factory (now in Harbin radio four factory) was born.

In 1963, the Netherlands began to produce audio-tapes, records of the golden age began.

In 1966, Sony Corporation offering application portable cassette tape cassette recorder TC-100, lightest than at the time the opening half of the cassette player and handy.

In 1976, Sony started the Philips company in the world's leading developer of laser video recordings (CD) for commercialization. At the same time, Germany of Telefunken and JVC also launched Japan second mini audio system. But only the Sony/Philips by way of non-contact optical pickup is closer to the original sound quality, and so April 1981 as the international harmonization of specifications, 16bit/44.1kHz, 12cm diameter, 74 minutes 42 seconds of recording time in a CD format.

In 1979, the world's first pocket-sized stereo tape player TPS-1 was born, is the beginning of the Walkman s.

In 1982, Sony launched the first CD player CDP-101, 101 is taken from the binary digits 0 and 1, 101 is 5, which indicates that the intermediate CDP-101 is Sony products.

November 1984, the first CD Walkman D-50 in Sony was born, strictly speaking, it is not a Walkman, the use of shock-proof technique, known as Discman CD Walkman began to spread.

In 1987, with a massive high-quality digital CD recording DAT was born, in the same year, the MP3 format in Germany of a research institution Fraunhofer-IIS, full name is MP3, is the study of images MPEGAudioLayer-3 compression format of by-products. , I.e. the audio compression format.

In November 1992 in CD was born ten years later, Sony to reverse the market downturn, Atrac format used by smaller non-contact optical MD was born.

In 1998, the world's first MP3 was born in Korea, at this point, both MDWalkman positive values, the volume of the comparable, is similar to but MD price of capacity expansion potential, the sound quality is good, beautiful designs, play time is longer, the then prevailing public opinion considers that the use of Flash MP3 is just a transitional product, it is difficult to have vitality.

In 1999, the twentieth anniversary of the Walkman, Sony launched the G-protection shock-technology, CD walkman, Discman poorly to exit the market.

In 2001, the United States launched the first generation Apple iPod, using high-capacity hard drive design, expensive, and so a lot of reasons, that it did not attract attention at home, then MP3 most still use low capacity of Flash, the brand still concentrated in Korea Samsung, northern cities in mainland China, or even just starting pop CD Walkman.

In 2003, the birth of the third-generation iPod, from the capacity to look all upgrade and improvement, more rounded corners, smaller, lighter, and from then on, personal audio equipment results to Sony, Samsung representative of Korea control situation into the iPod age.