Try this bizarre audio illusion! 👁️👂😮 - BBC

BBC · 5.8M views · 2010 · 3:26

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Why Hacker News recommends it

HN uses it as the standard demonstration that the brain reinterprets perception, in threads on speech, AI audio and illusions.

What it is

A BBC Horizon clip demonstrating the McGurk effect, where the same audio sounds like different syllables depending on the mouth movements you see. It shows that people integrate visual speech information into what they hear.

Recommended by 2 HN commenters across 2 different months, 2011 to 2020.

What Hacker News said

Recommends lunarscape · 2012-07 · on “Why You Won’t See Hard AR Anytime Soon”

"People already lie to themselves" The most compelling illustration I've seen of this is the McGurk Affect[1]. [1] [this video]

Recommends kkylin · 2017-08 · on “Can you make your brain not see this circle illusion?”

If you like this sort of thing, and haven't heard of the McGurk Effect before, take a look at this: [this video] .

Cites joeyo · 2012-12 · on “My journey to a cochlear implant”

> The disbelief came when it was time to listen to singular > words. With the screen turned off, I got 0%. With the > screen turned on, I got 8%. That’s crazy! It's really amazing how pervasive (putatively Bayesian) multisensory integration of information is in the brain. Even individuals without impaired hearing have their auditory perceptions strongly a affected by other inputs. The McGurk effect is a great example of this: [LINK] [this video]

Cites forgottenpaswrd · 2013-02 · on “Is speed reading really possible? ”

Sub vocalizing is the fact or reading syllables instead of entire words at once. Deaf could find very useful to vocalize words as they could read peoples lips and faces based on those units. Everybody read lips and faces subconsciously, there are famous illusions in witch people hear different sounds with the same sound file depending of the video of a mouth they watch: [this video]

Cites joeyo · 2013-07 · on “Why you think your phone is vibrating when it is not”

There is a considerable body of evidence that "top-down" processes affect not only how sensory evidence is processed, but how the sensations themselves are experienced. In other words, high-level (but subconscious) neural "judgments" about the statistics of the world, actually influence how you perceive it. To put it still another way: sensations aren't simply passively experienced; they are actively constructed by the brain. Phantom phone vibration is, in many ways, just as "constructed" as real phone vibration. Perceptual illusions provide one of the clearest ways to show that sensations reflect factors other than external stimuli. Here are two illusions, in different sensory modalities, t

Cites srean · 2014-06 · on “A Sound You Can't Unhear (And What It Says About Your Brain)”

It is really interesting and amusing how persistent certain 'illusions' can be even when one is exposed to it just once and for a short time. Fun story, this was a long time ago: I was interning at Google at that time. One day I tell my then cube neighbor about an interesting experiment on visual perception that I had read about. A professor at MIT had carried out experiments on his class. Students were asked to wear prismatic goggles that shifted their vision and then try to catch objects. Hilarity ensued, but soon enough the brain adapted to the shift. Same with inverting glasses, soon the students would not even realize that their vision was inverted. The fun part was when they took their

Cites sho_hn · 2014-12 · on “Ways to learn a language as an adult?”

I originally started with web resources, but here's the stuff I credit with really advancing me properly, roughly in the order I read or used it: 1. TTMIK's Hangeul Master . It's really easy to pick up hangul basics so spending $20 on a book that's superficially just about the alphabet might seem silly. But the harder part to learn isn't really the symbols, it's the pronunciation. You need to get to grips with the various sound change rules that apply when various characters are adjacent to each other, and with the pronunciation differences between the normal and tense consonants, and so on. If you can't look at a word and confidently form its sound in your head you can't read or write effic

Cites brute · 2015-02 · on ““Citizenfour” Awarded Oscar for Best Documentary in 2014”

Brief reminder that what you hear is being reinterpreted by your brain to match the things that you see. [this video]