...one of the strangest facts about audio is that your brain can “fill in” missing sounds that were never actually played.

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There’s a phenomenon called the phonemic restoration effect: if part of a spoken word is replaced by a cough or burst of noise, your brain often reconstructs the missing sound so convincingly that you don’t notice anything was removed.

Researchers can literally cut syllables out of sentences, and listeners still “hear” complete words.

This is one reason humans are surprisingly good at understanding speech in noisy places like cafés or train stations, your auditory system is constantly predicting and repairing sound in real time.

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The underlying idea connects to the scientific concept of Predictive Coding, where the brain acts less like a microphone and more like a prediction engine.