**2.4 Google's HearHere project**

HearHere is a navigation system for the visually impaired, which proceeds in two steps [17]. **Figure 6** shows the overview of this project process. First, the hardware equipped with the sensor is installed on the glasses to measure the direction of the user with the sensor, and the measured information is transmitted to the smartphone through Bluetooth module, and the software installed on the smartphone creates small destinations at regular intervals on the route to the destination based on the transmitted location information.

When the destination is set, the walking route from the current location to the destination is calculated, and a virtual waypoint that will generate a sound in units of 10 m is created. A visually impaired person feels as if a sound is emitted from the nearest waypoint, and when the waypoint is reached, the next waypoint is updated to sound.
