Perceptual analysis related to MPEG1-layer3 coding system

Digital audio compression plays a major role in music distribution (Internet or music education), and MP3 has become a standard format of compression. The methodology of such a codec includes removal of ultrasonic sound, stereo changing and masking effects. Psychoacoustical perception of compressed music has been assessed in this statistical study. Audiophiles (graduate musicians and music teachers) have shown a greatly developed ability to notice changes in sound compression, while the majority of music consumers haven´t evolved such a capacity. Factors such as musical style and ear anatomy play a major role in detecting audio changes. Descriptive statistics, distribution of probability, hypothesis of contrast and analysis of variance have shown that professional musicians have developed a fixed ability for recognizing MP3 songs while occasional music consumers haven´t evolved such a capacity.