Car Running Noise Detection System Using Frequency Change for Deaf and Hard-Of-Hearing People

Deaf and hard-of-hearing (DHH) people have difficulty obtaining information from hearing. Therefore, infor- mation from other senses, such as sight, plays an important role. However, in everyday life, DHH people face life-threatening challenges, such as the inability to notice approaching haz- ardous sounds from blind spots or from behind, and the time it takes them to avoid danger. In this paper, we focus on one of the hazardous sounds, the driving noise of a car, and propose a system to detect the approach and passage of a car to the device. The effectiveness of this system is demonstrated by detecting in real time the approach or passage of a car toward the wearer based on the time variation of the frequency received by the microphone installed on the smart glasses, and displaying the results on the lens. We discuss the proposed method and our validation of determining the approach and passage of cars.