Add typing to snr_normalization
Add typing to snr_normalization


Former-commit-id: 6cff0fd873decae0b6cfdd04fe373d4212e4f63c [formerly 4eb90e640bb4ecce0db1ee6d582c3b502709795c] [formerly e089236c1587238bc3a51e3944cb98ab72fc9648 [formerly 1f48e70ce31689b99ed70d19c73df3d2f09488ce]]
Former-commit-id: df3e8c8de61586f6348405563183248da14f2f9c [formerly 6362e3a680291cafbcb6d0206bb615c9b74b9172]
Former-commit-id: 378ec78c711a75904cffaa46d2c63ee077810267
jason-neal/eniric,jason-neal/eniric