Beautiful music can cultivate sentiment, treat diseases, and prolong life, but loud, fast-paced, and highly stimulating music is harmful to health. A survey by American experts found that crazy sounds and rhythms can disrupt the normal rhythm of the human heart and blood vessels, causing damage to the heart. Chinese ear scientists pointed out that playing loud, fast-paced, and highly stimulating music all day long can cause intersensory deaf. According to measurements, the volume of rock music is 90 to 110 decibels, that of disco music is 104 to 114 decibels, and that of symphony is generally around 80 decibels. The international noise deafening standard is 90 decibels. Therefore, experts suggest that it is best to listen less or not to music that uses more percussion instruments, and not to turn up the volume of household appliances too high. Pregnant women should pay special attention to this.