Mighty Optical Illusions » Audio http://www.moillusions.com Biggest Optical Illusions blog. Dedicated to visual phenomena and real life illusions. Daily updated. Sat, 11 Feb 2012 22:07:31 +0000 en hourly 1 http://wordpress.org/?v=3.3.1 McGurk Effect Audio-Video Illusion http://www.moillusions.com/2011/05/mcgurk-effect-audio-video-illusion.html http://www.moillusions.com/2011/05/mcgurk-effect-audio-video-illusion.html#comments Mon, 09 May 2011 03:59:40 +0000 Vurdlak http://www.moillusions.com/?p=10369 Now here is a great find, Dylan pointed out to me. I’m not sure if you’ve heard of the McGurk Effect before (I haven’t), but in short, it’s a perceptual phenomenon which demonstrates an interaction between hearing and vision in speech perception. In practice, this audio-video optical illusion effect may be experienced when a video [...]]]> Now here is a great find, Dylan pointed out to me. I’m not sure if you’ve heard of the McGurk Effect before (I haven’t), but in short, it’s a perceptual phenomenon which demonstrates an interaction between hearing and vision in speech perception. In practice, this audio-video optical illusion effect may be experienced when a video of one phoneme’s production is dubbed with a sound-recording of a different phoneme being spoken.

Perhaps, it might be best if I just let you watch this short, yet professional video BBC produced. It explains the whole deal, and includes some real-life examples of McGurk effect in action. Have we just “discovered” a whole new field of optical illusions to be showcased on this site? Could be… BTW, it might take some time before the video loads. It’s somewhat large, comparing to our previous video illusions!

]]> http://www.moillusions.com/2011/05/mcgurk-effect-audio-video-illusion.html/feed 97 Ringtone Audible Only to Under-20 Year Olds http://www.moillusions.com/2006/05/ringtone-audible-only-to-under-20-year.html http://www.moillusions.com/2006/05/ringtone-audible-only-to-under-20-year.html#comments Wed, 24 May 2006 19:05:00 +0000 Vurdlak http://testvurdlak8.wordpress.com/2006/05/24/ringtone-audible-only-to-under-20-year-olds/ Woow!!! This has to be the coolest audio illusion of all times! Apparently, using the Mosquito device, UK pupils have recorded the ultra-high sound that is audible only to under-20-year-olds. Your hearing gets progressively worse around the age of 20, so if you play a sound on the edge of your hearing spectrum, unless you [...]]]> Woow!!! This has to be the coolest audio illusion of all times! Apparently, using the Mosquito device, UK pupils have recorded the ultra-high sound that is audible only to under-20-year-olds. Your hearing gets progressively worse around the age of 20, so if you play a sound on the edge of your hearing spectrum, unless you have perfect hearing, you won’t be able to hear it at all. As I understood, the audio file is somewhere between 18KHz – 20KHz. When I played it, I haven’t heard anything, and thought it was just another internet hoax, but then my 14 year old brother started yelling at me, to lower that sound cause it’s driving him crazy – and he was in lower apartment!! Another thing.. my dog also flipped out! Here is the audio file. Check it out and report your findings!

This effect works best if you put on your head-phones. If the player below doesn’t work for you, download the Mosquito High Freq mp3.

1. Use your headphones if you don’t hear it the first time.
2. Test this mp3 file on your little brother, sister or a dog.
3. Be carefull not to drive someone crazy with this.
4. Test Your hearing here.

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