Music Preference Detection System Design And Preliminary Application

Brain and cognitive neuroscience has become one of the most important and the most active subjects in scientific research currently. Music is the product of intellectual activity of the brain, and has a variety of impact on our emotion and behavior. The mechanism how music effects brain has been increasingly becoming a hot topic of neuroscience and psychology. However, these studies had more or less methodological deficiencies. In view of that there are many difficulties in the studies how music effect brain and non-human mammals may have a common emotional response to music with human, we used rats to study the animal's preference for different music for exploring the basic response of animals to music.In this study, we designed a music preference detection system in accordance with experimental requirements. The system consisted of four parts: test units, music playback system, infrared detection system and monitoring system. When designing test units and music playback system, we considered the acoustic characteristics of music and living habits of rats generally. And the infrared detection system could effectively reduce the external interference with the function of anti-shake detection.The following four types of music stimuli were adopted to study the music preference in rats. They were silence, Mozart music (Mozart's Sonata for Two Pianos in D Major, K. 448-1st Movement), white noise and rock music (Nirvana's Hairspray Queen). Statistical results showed that the dwelling time of rats spent in the quiet environment was the longest while Mozart music was the second, white noise was the third and rock music was the last. In addition, source entropy analysis and scaling analysis were applied to the actual audio data of music, whose results were consistent with the experiments.This study shows that rats prefer quiet environment in the four music environment (quiet, Mozart, white noise and rock), followed by Mozart music and white noise, and rock music is the most annoying. The degree of preference for different music may be relative to the uncertainty and the characteristics of the 1/ f~αnoise of music.