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A comment on Visualizing vowels as colored ACF images. Parent comment

Re:Visualizing vowels as colored ACF images by nitrogen on Saturday December 04, 2021 @01:19AM (#29439116)
Are the overall amplitudes normalized? Some images appear brighter or darker than others, so I wonder if comparing them would be easier if there was some kind of perceptual brightness normalization step.
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Re:Visualizing vowels as colored ACF images by gbh444g on Thursday December 09, 2021 @04:36AM (#29495463)
Amplitudes are normalized locally, using something like a moving average. Global normalization rarely works because most sounds have high dynamic loudness range.
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