Frequency is the expression of vibration. Most of what the human ear hears ranges from 20HZ to 20,000HZ. Generally, your hearing will not be damaged if you hear 19,999HZ. If it exceeds 20,000HZ, you will not be able to hear it. What is harmful to hearing is decibel (db). Usually the noise index accepted by the human ear is between 50 and 50. Between 90db and above 90 to 110db, the human ear feels obvious discomfort, above 120db hearing loss, above 130db eardrum bleeding, above 150db complete hearing loss. .

So try not to turn up the volume, listen for a while and then go to sleep