Hearing loss will have a negative impact on the quality of life, social behavior and communication skills, and will also reduce the ability of the elderly to live independently. Many elderly people are unwilling to let people know if they find that they have hearing loss.There is no lack of reasons for avoiding or refusing to wear hearing aids because they do not want to cause financial burden on their children. The more important reason is the lack of understanding and lack of confidence in the help of hearing aids in the rehabilitation process.
According to WTO standards in 1997, normal hearing is within 25 decibels, and 26 to 40 decibels is mildHearing loss，41到60是中度听力损失，61到80是重度听力损失，81以上就属于极重度听力损失，根据你的生活工作环境来选择。
According to a data from a foreign institution, the medical expenses of the elderly who do not wear hearing aids are 46% higher than those of their normal hearing peers.
