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This paper investigates Hey yaa, a haptic wearable interaction system that allows sensory-motor communication through vibration. The system allows users to call each other attention through haptic sensation, without using voice or vision. Hey yaa, thereby, meets the special needs of the hearing impaired and works as an assistive technological solution to call people when they usually wouldn’t be able to do so. Hey yaa prototype consists of two waist belts. When a button is pressed in one, the other one vibrates, drawing the user’s attention. We evaluated Hey yaa concept and prototype regarding usability, usefulness, usage learning, communication with interlocutor and appearance. As a result, test users confirmed its relevance and gave directions for further improvement.