Table 4.

Summary of Various Audio-Assisted and Speech Recognition-Based Navigation Technologies.

Audio Assistance and Speech Recognition
Voice Input	The systems such as Google Assistant and Siri take your voice as input to provide a precise output
Cost-Efficient	The visually impaired person only needs a smartphone installed with Speech Recognition assistance that will guide him in a human-like voice
Limitation	Speech Recognition and Assistance needs a stable wireless connection to provide you with voice output.