From an iPhone microphone, I have a background recording of 5s(fs = 44.1 Khz), and immediately after that, I have a voice recording of a person saying 'aaa...' for 10s(fs = 44.1 Khz). How can I use the background recording (How do I characterize the noise from it?) to improve the SNR in the voice recording? The noise can be colored too, also I am modeling it as a additive noise.
Can someone please point me to any work related / in a similar direction (theory, implementation etc.,)