Science Fiction
Dictionary
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
 |
Chant Disruptor At Stadium Near You?
Soccer games in Europe have been disturbed by hooligans chanting abusive or racist slogans; fortunately, science has come to the rescue. Sander van Wijngaarden, who researches human acoustics at the Netherlands Organisation for Applied Scientific Research in Delft, has successfully tested a "chant disruptor."
We knew that people become confused if you feed their speech back with a delay... So we wanted to try and apply it in a group context," says Wijngaarden. He assembled his equipment along with about 350 volunteers. Speakers simulated a typical crowd chant; the volunteers were encouraged to join in. However, one of the speakers replayed the chant with a short delay.
It turns out that a delay of 200 milliseconds to about one full second makes it extremely difficult for the volunteers to continue the chant. Stadiums could be built with special speakers built in to discourage unwelcome chants.
In a way, these systems are about noise-cancellation; of course, the loudspeakers playing the delayed version of the chant just make it difficult to continue, they don't cancel the sound. Science fictional noise-cancellation started in 1956 with Robert Heinlein's hush corner followed by Arthur C. Clarke's Fenton silencer in 1957.
See the brief article on Hooligan chants silenced by delayed echoes.
Scroll down for more stories in the same category. (Story submitted 5/15/2006)
Follow this kind of news @Technovelgy.| Email | RSS | Blog It | Stumble | del.icio.us | Digg | Reddit |
Would
you like to contribute a story tip?
It's easy:
Get the URL of the story, and the related sf author, and add
it here.
Comment/Join discussion ( 0 )
Related News Stories - (" Communication ")
Will Whales Be Our First Contact?
'He had piloted the Adastra to its first contact with the civilization of another solar system.' - Murray Leinster, 1935.
NYC/Dublin Portal Fails To Meet 'Guardian Of Forever' Standards
I am the Guardian of Forever.
Holobox? Who Doesn't Want A Home Hologram?
'...there appeared standing upon the disk, the image of a man...' - Edmond Hamilton, 1928.
EBS-260 Handjet Free Hand Dot Matrix Printer
'McKie held a chalf-memory stick over the dusted surface.' - Frank Herbert, 1964.
Technovelgy (that's tech-novel-gee!) is devoted to the creative science inventions and ideas of sf authors. Look for the Invention Category that interests you, the Glossary, the Invention Timeline, or see what's New.
Science Fiction
Timeline
1600-1899
1900-1939
1940's 1950's
1960's 1970's
1980's 1990's
2000's 2010's
Current News
Cognify - A Prison Of The Mind We've Seen Before In SF
'So I serve a hundred years in one day...'
Robot With Human Brain Organoid - 'A Thrilling Story Of Mechanistic Progress'
'A human brain snugly encased in a transparent skull-shaped receptacle.'
Goodness Gracious Me! Google Tries Face Recognition Security
'The actuating mechanism that should have operated by the imprint of her image on the telephoto cell...'
With Mycotecture, We'll Just Grow The Space Habitats We Need
'The only real cost was in the plastic balloon that guided the growth of the coral and enclosed the coral's special air-borne food.'
Can A Swarm Of Deadly Drones Take Out An Aircraft Carrier?
'The border was defended by... a swarm of quasi-independent aerostats.'
WiFi and AI Team Up To See Through Walls
'The pitiless M rays pierced Earth and steel and densest concrete as if they were so much transparent glass...'
Climate Engineering In California Could Make Europe's Heat Waves Worse
'Pina2bo would have to operate full blast for many years to put as much SO2 into the stratosphere as its namesake had done in a few minutes.'
Optimus Robot Will Be A Good Nanny, Says Musk
'Nanny is different,' Tom Fields murmured... 'she's not like a machine. She's like a person.'
ESA To Build Moon Bases Brick By Printed LEGO Brick
'We made a crude , small cell and were delighted - and, I admit, somewhat surprised - to find it worked.'
Does The Shortage Of Human Inputs Limit AI Development?
'...we've promised him a generous pension from the royalties.'
Textiles That Harvest Energy And Store It
'The clothes and jewelery drew their tiny power requirements from her movements.'
LORIS Passive-Gripper Climbing Robot
'At the end of each appendage's eight fingers there are tinier appendages...'
Neuroplatform Human Brain Organoid Bioprocessor Uses Less Electricity
'Cultured brains on a slab.'
Drug To Regenerate Teeth In Humans
'We want to do something to help those who are suffering from tooth loss or absence,' said lead researcher Katsu Takahashi.
Coin-Sized Nuclear Battery Good For 100 Years
'...power pack the size of a pea.'
Live Stream With Meta-Ban Multimodal Smart Glasses
'...the bug-eyed, opaque gape of her True-Vu lenses.'
