Auditory assistive devices for the blind
Massof, Robert W.
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Most auditory assistive devices for the Blind employ synthetic speech. These include talking computer interfaces, reading machines, talking signs, and a plethora of talking appliances and gadgets. Some devices use warning tones to signal events or localize objects. Sonification in assistive devices is limited to wayfinding systems that encode range into frequency. There are now some prototype systems that offer more complex sonifications for wayfinding and interpreting images. There still are no assistive devices that use both 3D sound and sonification to augment the auditory environment.