18. The system of claim 17 , wherein wherein each of the plurality of first hierarchical level machine learning models is trained to determine a different characteristic associated with the ambient audio stream and to output a corresponding confidence score.
18. The system of claim 17 , wherein wherein each of the plurality of first hierarchical level machine learning models is trained to determine a different characteristic associated with the ambient audio stream and to output a corresponding confidence score. 19. The system of claim 18 , wherein the second hierarchical level machine learning model is configured to determine the one or more real characteristics of the ambient audio stream based on confidence scores outputted by each of the plurality of first hierarchical level machine learning models.