Try this bizarre audio illusion! ๐๏ธ๐๐ฎ - BBC
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Further reading 1
Caption notes
The BBC demonstration keeps the soundtrack constant while changing the visible mouth movements. Watch the mouth, then look away, and compare which syllable you report hearing.
Archived captions (transcription method unspecified) โOriginal passages ยท 2
the sound hasn't changedwhat we see overrides what we hear