In real life, various types of sound interference sources are different: crowded streets, noisy music, thrilling electric drills, loud lawn mowers, keyboard click, dog bark... they are always ubiquitous, disturbing and tense. For sound-sensitive persons, if there is frequent sound interference in the environment, it will remain in a state where it is difficult to fall asleep and hard to work. For a long time, it will lead to negative emotions such as insomnia, anxiety and irritability.