Lesson 7 the history of personal music players


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Lesson 7 the history of personal music players

  1. 1. The Walkman - Report By. Tiffany Chong
  2. 2. Structure and Purpose <ul><li>The Walkman is a small portable stereo-cassette player, with a pair of lightweight headphones. </li></ul><ul><li>It was a music player, and was one of the first small portable personal players, included a 50g headphone made especially for it and at a low price. </li></ul>
  3. 3. Technology – How It Plays <ul><li>The audiocassette tape used in any tape recorder is coated with magnetic particles. If the cassette is blank, the magnetic particles will point in random directions. </li></ul><ul><li>However, when music is recorded, they will automatically fall into a pattern that is identical to the original sound waves. </li></ul><ul><li>When the, “Play,” button is pressed, </li></ul><ul><li>the tape passes over a reader, “head,” that </li></ul><ul><li>contains the electromagnet, which is </li></ul><ul><li>highly sensitive to the patterns recorded </li></ul><ul><li>on the tape. The head then transmits a </li></ul><ul><li>matching, electrical signal, to the tiny </li></ul><ul><li>diaphragms in each earpiece </li></ul><ul><li>of the Headphone causing them to </li></ul><ul><li>vibrate and create audible music </li></ul><ul><li>sound waves. </li></ul>
  4. 4. Technology – How It Plays <ul><li>The Walkman consists </li></ul><ul><li>of basic features to </li></ul><ul><li>perform such functions as: </li></ul><ul><li>play, pause, rewind, fast- </li></ul><ul><li>forward, record, and stop. </li></ul><ul><li>In a basic Walkman, </li></ul><ul><li>there are two heads, one </li></ul><ul><li>of which contains two </li></ul><ul><li>small electromagnets. </li></ul><ul><li>These two heads record </li></ul><ul><li>the two separate channels </li></ul><ul><li>of a stereophonic program. </li></ul><ul><li>The tape recorder has two sprockets that engage the spools within the cassette. During the recording, or playback, or fast forward, or reverse, the two sprockets spin one of the spools to engage the tape to match the function desired. </li></ul>
  5. 5. Technology – How It Plays <ul><li>The two heads are fitted below the two sprockets. </li></ul><ul><li>The head on the left side is designed to erase, and wipe the tape clean before recording. </li></ul><ul><li>The centrally located head, functions as the record and the playback head, it is the one that contains the two tiny electromagnets. </li></ul><ul><li>The capstan and pinch roller are fitted on the right. </li></ul><ul><li>The capstan revolves at a precise speed and pulls the tape across the head at the right speed. The standard speed of the capstan is 1.875 inches per second. The function of the pinch roller is simply to apply pressure in order that the tape is held securely and tight against the capstan. </li></ul>
  6. 6. The Invention <ul><li>Masaru Ibuka, the co-founder of Japan's world-renowned Sony Corp. requested that his engineers design, and create a portable stereo cassette player for long business trips. </li></ul><ul><li>On his return, Ibuka was so impressed by his engineers, that he suggested that the new portable stereo tape recorder be put into full production. </li></ul>
  7. 7. Price <ul><li>Morita, the company's chairperson encouraged the engineers to develop a player similar to the one they had developed for Ibuka. </li></ul><ul><li>However, this one had to cost less than ¥40,000 including the headphones yet provide the same sound quality. Which was around $110 in 1971. </li></ul>
  8. 8. Its Coming Of Age <ul><li>January 01/1979., the Walkman became the must-have item for music aficionados and teenagers. </li></ul><ul><li>However, the craze stopped in 1986s when the first Discman was introduced. </li></ul>
  9. 9. THE END