With dozens of microphones, embedded actuators and vibrators, Versatile Extra-Sensory Transducer responds to inputs from a phone or tablet app.

“Along with all the actuators, the system includes a controller board and two batteries,” said Gary Woods, Rice professor in the practice of computer technology. “The actuators vibrate in a very complicated pattern based on audio fed through a smartphone. The patterns are too complicated to translate consciously.”
Experiments of the device on those with hearing impairment has been done. Dr. Novich said, “As they use the vest more, they get feedback and know whether they are right or wrong and start to memorize patterns. People are able to identify words they have never encountered before.”
Source-Medindia