As we all might have felt or seen, the impact of different mental illnesses has increased as the modern workforce is shifted from physically challenging tasks to mentally challenging tasks. With this change in the nature of work the impact on the human’s mental health is increasing as compared to earlier times. So we also need to give this area more attention than before. In this paper we have surveyed papers that discuss about using Audio features and using it for building machine learning models for predicting different mental illnesses. For this study Supervised learning ML models are preferable as going with the audio features unsupervised ML models may get confused with different excitement states.