Optimizing the Functionality of a Voice Recognition System for Assistive Technology

Abstract—The purpose of this study is to develop and optimize the functionality of a low-cost, light-weight system that allows for recognizing voice commands. The system utilizes state-of-the-art voice recognition electronics (VR Stamp, Sensory Inc.), which are programmed to recognize a small set of command words under the speaker independent mode. The functionality evaluated in this study includes issuing a nurse call signal and activating a single-switch controlled assistive device. The study also assesses the sensitivity and specificity of voice recognition by varying the speaking volume and the distance between the speaker and the microphone. The resulting system provides a reliable performance and is useful for voice activation of assistive devices to aid persons with disabilities. I