hearing aid

The essence of a hearing aid is a sound amplifier that converts sound into an electrical signal by capturing it, filtering out noise signals, and amplifying the electrical signal through an amplifier to transmit the sound to the ear with minimal distortion. As an important tool, hearing aids can effectively improve the condition of hearing-impaired individuals. Hearing aids are divided into air conduction hearing aids and bone conduction hearing aids according to their conduction modes. Viewers can watch live hearing aid models and wall mounted graphic display boards to gain a visual understanding of the internal structure and classification of hearing aids. Listening test is a medical examination method used to evaluate an individual's perception and comprehension ability of sound. The principle includes subjective testing and objective testing: subjective testing evaluates the response of the subjects, while objective testing measures the auditory nerve response using instruments and equipment. The purpose of a hearing test is to understand whether the subject has hearing loss, as well as the type, degree, nature, and location of the hearing loss, in order to provide a basis for doctors' diagnosis and treatment. visitors can.

The unit is designed for unsupervised public use: controls are recessed or shielded, moving parts are enclosed, and the interface is operable by a child of about six with no instruction. Where a screen is used, the language can be switched without changing the hardware, and the content can be replaced on site.

The main structure of a hearing aid is: ① The microphone converts the collected sound wave signals into corresponding radio wave signals. Number, transfer it to the chip. ② The main function of an amplifier is to convert small electrical signals into larger ones. ③ A receiver is a device that converts electrical energy into sound energy, converts amplified electrical signals into sound signals or mechanical vibrations, and transmits them into the ear canal.