Effect of Speech Rate on the Speech Recognition Accuracy:A Review

Humans can understand different speaking styles and peaking rates (Normal, Fast and Slow) of speech, but for the computers it is difficult task to recognize the speech accurately. Many variations such as co-articulation, physiology of speaker's formant frequencies between speaker vocal tracts will affect the accuracy of speech recognition. In this review, it focuses on variations with in the acoustic signal that makes speech recognition task difficult. In this survey, more research works was summarized relating to the effect of speech rate in speech recognition accuracy. In this the features which mainly affect the recognition accuracy and the different techniques for improving the speech recognition accuracy are discussed in the proposed research activities. In order to get better accuracy for the speech recognition, the role of pronunciation dictionary is also discussed. It can be used as a source of reference material.