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It's a matter of data reduction

Posted by Analog Scott on September 26, 2022 at 10:44:25:
we retain enough to trigger recogniable patterns. We don't fully record it mentally. It's how our hearing evolved. Back when we were hunter/gatherers along with our ancestors going back at least 10 million years our hearing served the purpose of finding food and not becoming food. Our brians are wired for quick recognition. For that we needed data reduction and trigger recognition. If we actually put the entire sound to long term memory the time it would take to process it because of the massive amount of data would be self defeating. We would lose the food and become the food while waiting to process and match the sounds.

As such our long term aural memories are reduced to a very very very small fraction of the original signal. Our brains fill in the rest of the missing data.