Assistive technology device for helping speech intelligibility of emergency signal from outside under noise and vibration exposure condition of transportation vehicles

摘要

Peoples such as drivers or passengers are listening to music by using a different kind of listening devices such as speaker, headphone, earphone, and bone conduction earphone. During this listening condition, when some accident has happened, driver or passenger has to recognize the emergency signals or speech from the outside of vehicle having different noise and vibration exposure environment conditions. But, during these conditions, it is not clear exactly whether which listening device is better to understand the external signals. To clarify the good listening device, during listening music, the signals with different STI (Speech Transmission Index) voice from the outside were presented to the driver or passenger on the driving simulator under some noise and vibration condition. They had to need to evaluate the speech intelligibility of each STI signals. After these experiments, it was clear that the speech intelligibility had the difference among speaker, headphone, earphone, and bone conduction earphone. It was also clear the bone conduction listening device was the best device.