I'm not familiar with either EPA or TBARS so I can only comment on normalization in general. to normalize = any process by which you change the original values of a signal/(or whatever you're dealing with) to values that are closer to normal/standard values. 1 (original data - since the peak value is 0,5 the sound is possibly too low and we may wish to increase the amplitude of the signal by normalizing it ) Normalization 1.
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