Topic: high frequency sound therapy

Tactile symbols which are textured objects, actual objects or elements of real objects which are used as a communication symbols significantly for people with visual impairments and/or vital mental impairments. Both low- and high-tech gadgets can incorporate the usage of symbols. With low-tech units, a communication companion is concerned and should interpret the symbols chosen. Picture Communication Trade System (PECS) is a commonly used low-tech communication system that teach people learn how...