Hearing threshold rise

Everyone knows that we call the hearing organ's ability to sense sound as hearing, and to evaluate hearing clinically, we must find a standard that can be regulated by numbers. When measuring hearing clinically, the average value of the hearing threshold of each frequency of normal hearing people around 20 years old is taken as 0dB, and the decibel number of hearing loss of a patient is measured. If the patient's hearing loss exceeds 30dB, the hearing threshold for this frequency is increased by 30dB, and deafness can be diagnosed. The noise is very strong and the peak of the spectrum changes greatly. When the noise such as jumping up and down damages the ear, it will cause the hearing threshold to rise.