optimize ComputeDecibel in fsmn-vad model by using numpy (#2174)

StevenH

2024-10-26 1254e8aee1e3200acc2b4752c6822bfc1a21b22f

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from fun_text_processing.text_normalization.en.taggers.tokenize_and_classify import ClassifyFst
from fun_text_processing.text_normalization.en.verbalizers.verbalize import VerbalizeFst
from fun_text_processing.text_normalization.en.verbalizers.verbalize_final import VerbalizeFinalFst