The term “smart” usually refers to the ears and eyes, which are the main organs for receiving information from the outside world. Hearing and vision are transmitted to the nerve centers of the cerebral cortex, where they are synthesized and analyzed to make quick and accurate responses and judgments. Therefore, the presence of auditory and visual integrity is vital to active human thinking and reaction ability, especially auditory, which is related to the maintenance of human speaking ability and reaction ability. Therefore, the loss or impairment of auditory function can have an impact on a person’s ability to think, react, and even socialize and psychological state. The onset of deafness can be fast or slow, but in some cases, the loss of hearing can occur within a few hours or days (e.g., sudden deafness, trauma-induced deafness), and patients often seek immediate medical attention. However, more often than not, slow onset, progressive hearing loss often occurs without realizing that their deafness has occurred and is progressing due to gradual adaptation to speech and environment. There are mild and severe degrees of deafness. In mild deafness at first, there may be only ringing in the ears, which occurs when there is silence; then there is hearing sounds but not being able to distinguish them clearly, the so-called “hearing sounds but not distinguishing them”; once the hearing is not heard, it is already a more serious deafness. The causes of deafness are different, but some of them are completely preventable. For example, drug-related deafness, noise or shock deafness, and deafness related to metabolism and blood supply disorders. Through the popularization of scientific knowledge, understanding the mechanism of deafness and prevention methods, deafness can definitely be reduced or delayed. As for deafness caused by otitis media, it is also completely curable through medication and surgery. The key is to seek early diagnosis and treatment for the symptoms of hearing loss in order to protect the other “window” of our hearts.