抄録
Background: The number of blind people (PB) is increasing in proportion to the increase in the number of diabetic patients in the Asian region. So far, we have investigated the effect of energizing alerts to avoid a collision. In the case of a home collapse accident, recognition of the spatial relationship at the edge of the home is important.
Purpose: To clarify Using a super-directional speaker warning device in the platform environment of a simulated station, can the sound of the super-directional speaker distinguish the position of the end of the home in the noise to the visually handicapped.
Intervention: Subjects were set up so that they were not subject to the test (n = 9). Design: Single-blind randomized controlled trial. The control state of the device was unknown. The control information setting circuit made the walking to the white line vertically and output the sound of the super-directional speaker in the direction parallel to the white line among the noise of the omnidirectional speaker. The control condition was a trial under the condition that the sound of this speaker interrupted the connection from the device and no information was provided.
Results: During the experiment, everyone succeeded in listening to the super-directional sound in the noise. It was able to stop walking at that position, 35 out of 36 trials in the intervention condition succeeded and the control state succeeded 2 out of 36 trials.
Restriction: Although this experiment is a small investigation, since the trial time (frequency) is high, the pooling value of error items decreases.
Conclusion: In this experiment, we could create an environment called a simulated station platform and showed an important success rate of 97% avoidance of the object's white line deviation using this device.
