Like what? What did we not know 50 year ago at the advent of digital audio, that we (don’t) know now? Maybe the measurements have gotten better, most certainly cheaper and more accessible. That doesn’t mean we gained a lot of knowledge on audibility.Anyway keep in mind that twenty or fifty years ago it was not possible to make measurements with the reliability and the number of parameters that today are handled in ASR. And that in twenty years and fifty years ASR measurements will be even better and will include more parameters that today are considered inaudible. That is the progress of science, which is not a static thing.
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