As we all know, we call the ability of the auditory organ to perceive sound as hearing, and the clinical evaluation of good or bad hearing is to find a standard that can be regulated by a number, and this is the role of “hearing threshold”. The patient’s hearing loss is more than 30dB, that is, the hearing threshold of the frequency has increased by 30dB, can be diagnosed as deaf. When the noise is very strong and the top of the spectrum changes a lot, jumping up and down, etc., the hearing threshold will rise when the noise damages the ear. So, how should patients prevent the hearing threshold rise? The following is a brief introduction: 1, blast injury occurs mostly in war, so weapons should be improved to reduce the sound intensity of the blast, strengthen the fortification building, education warriors pay attention to protective body position during combat, gunfire and gunpowder blasting, pay attention to open-mouth breathing and swallowing action to facilitate the opening of the eustachian tube. The use of protective earplugs and helmets, domestic has a variety of models of protective earmuffs and helmets, such as injury V-51R earplugs and JW-2 type earplugs. 2, can not carry a long-term Walkman, now the noise can be said to be pervasive and ubiquitous. The impact on human health is very large, now in life noise manifestations are many, we generally say that the noise is strictly speaking irregular various frequencies are mixed with the sound, which is the concept of physics. The concept of physical acoustics I do not want to contact the sound is called noise. Originally in the concert hall, pleasing music, some people may not want to listen, this music is also a noise for him, so in terms of physical acoustics. This unwillingness to receive the sound, we broadly defined it as noise, the environment is a lot. Another situation, although you are very willing to accept it, very pleasing to the eye, willing to listen, let’s say, we listen to music, but too long, too much exposure to the intensity of the sound, hearing damage is also unaware of.