听力消失的主要原因:
1. cerumen impaction (impacted ear wax)
2. trauma to the ear or head.
3. loud noise/loud sounds.
4. ototoxic medicines.
5. work related ototoxic chemicals.
6. nutritional deficiencies.
7. viral infections and other ear conditions.
8. delayed onset or progressive genetic hearing loss.
对付的方法(我的看法)
1. 尽量少掏耳朵
3. 别戴耳机
4. 注意药的副作用
6. 饮食平衡 (multi vitamins etc)
7,8 多锻炼