The human hearing range is between 20Hz to 20Khz and it is most sensitive between 2 to 4 KHz. This MP3 model among other techniques tries to eliminate the frequencies which the human ear is unable to hear keeping all the hearing frequencies leaving intact the hearing experience. Through the use of such advanced compression techniques, entire songs can be recorded and stored for a fraction of the space other wise needed.
MP3’s have provided the means for people to compress their favorite songs at up to a 12 to 1 compression ratio without loosing the quality of the original recording. A song that would have been an unwieldy 50 megs in size, would compress into a neat little package coming in around 4 or 5 megs.

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