SHD: Development of an Smart Headband for Deafblind People

Abstract

In this paper, we have developed a device for the blind and deaf to detect the location of loud sounds. Deaf people in our country face various problems due to their hearing loss. They cannot hear when someone calls them, so they burden society. Inaudibility of car horns (unless honked loudly) leads to various accidents. This device will free them from these problems. Blind people can easily cross the road and walk using this device. Here we used an STM32F401CC microcontroller, LM358P IC, condenser mic, vibrator, some resistors, some capacitors, and some connectors. This device uses six sound detector vibrator circuits, which become a complete device by programming with Arduino IDE. Input is taken from six different mics. The maximum and minimum readings of the mic are extracted. The audio level is derived from the difference between the highest and lowest values 1000 times. Among the six devices with higher audio levels, the vibrator in that circuit will turn on, i.e., the sound intensity will be higher in that direction and will vibrate at that point. Then the deafblind people (users) will know from which direction the sound is coming. This device is cost-effective. According to the feature analysis, this work outperforms the previous works.