According to a survey, there are 134 million people over 60 years old in China, of which more than 30% have hearing impairment and 50%-70% of the 80-year-olds have serious high frequency hearing loss. From the above data, it can be presumed that the elderly will be a huge group of people using hearing aids. Therefore, it is especially important to make people aware of age-related deafness and to help them understand the role of hearing aids. Age-related deafness is a chronic progressive deafness that occurs in both ears with age and can lead to total deafness in severe cases. The age and rate of progression of age-related deafness varies from person to person, but usually occurs in older adults between the ages of 65 and 75, with an incidence of up to 60%. Age-related deafness has symptoms and characteristics: 1. Bilateral symmetrical hearing loss of unknown cause that occurs only at the age of 60 or older, with high frequency hearing loss being the main cause. The hearing loss is slow and gradual and often goes unnoticed at first. With the continuous decline of high-frequency hearing, the ability to distinguish language is affected, the phenomenon of hearing inaudible at first, often requiring others to repeat; later, with the gradual loss of language frequency, the speaker is required to raise his voice to talk with it. 2, there is often the phenomenon of auditory reverberation, that is, a small voice can not hear, loud and too noisy. 3, language resolution and pure tone hearing is not proportional, that is, “phoneme decline”. In most cases, pure tone hearing loss is not as serious as speech hearing, that is, many elderly people have normal pure tone hearing, but cannot understand the content of speech. In a noisy environment, the elderly can not understand the speech even worse. 4, Some patients with senile deafness can be accompanied by tinnitus, which is often a high frequency sound. 5.There is no medicine to restore the hearing of senile deafness, which is a phenomenon of aging of human body. When encountering hearing loss, active treatment should be given, and hearing aid is needed to help hearing after the situation is stable.