wavelet level criteria decision

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HANS
HANS 2018-4-3
回答： HANS 2018-6-18
Hi,
I am using 'db' wavelets to reduce noise. As I know, at most, higher level wavelet processing reduces noise better. but how to decide wavelet level dynamically to get best SNR(comparing a threshold in time or frequency or acc. to a statistics) ?
Thx :)

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HANS
HANS 2018-6-18
update, need advice.
Thx, WR

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