回答(49)题 查看材料A.High sound of 150 decibels can kil
回答(49)题 查看材料
A.High sound of 150 decibels can kill a healthy rat.
B.The vibration of air can produce infrasonic waves.
C.We cannot play high-pitched music with ordinary musical instruments.
D.If the intensity of infrasonic wave exceeds 160 decibels, it is extremely harmful.
E.Dolphins, whales and bats can make such high-frequency sound.
F.Therefore, the sound of ordinary musical instruments cannot harm your health.