Analysis of Contact Point between Audio Equipment and Concha Cavity

In the fine field of audio equipment design, the contact range between the ear cavity and the audio equipment has become a crucial human-computer interaction interface. The analysis of the contact range between the audio equipment and the ear cavity is not only related to the optimization of acoustic performance, but also profoundly affects the user 's comfort, wearing stability and adaptability. The market audio equipment is divided into conventional headphones, hearing aids and professional ear return. These three types of audio equipment have different functional distinctions, but they are roughly the same in appearance design. Based on the physiological structure of the ear, this paper compares the characteristic points of the ear cavity defined by various experts and scholars, analyzes the contact range between three different audio devices and the ear cavity on the market, summarizes the rules, and provides a new idea for the design method of audio equipment.