Add your Article
- E Learning Jamaica
- 2014 GSAT Results for Jamaican Kids
- Results of GSAT are in schools this week
- E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
- GSAT Exam Preparation Jamaica
- 2014 GSAT Results for Jamaican Kids
- Tarrant High overcoming the odds
- E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
- GSAT Exams Jamaica Scholarships
- 2014 GSAT Results for Jamaican Kids
- GSAT Practice Papers | GSAT Mathematics | Maths
- Access denied - Disabled boy aces GSAT
- Human Body
- Sea Kids See Clearly Underwater
- Cell Phones and Possible Health Hazards
- A Long Trek to Asia
- Parents
- Children and Media
- Raise a Lifelong Reader by Reading Aloud
- The Surprising Meaning and Benefits of Nursery Rhymes
Echoes of a Stretched Egg
Published: 07/05/2010
You are what you eat, a familiar saying goes. When it comes to eggs, though, you don't even have to eat them to resemble one. Sound waves bounce off people as if each person were an enormous, stretched-out chicken egg, scientists reported recently at a meeting of the Acoustical Society of America. The discovery could help designers build better concert halls or other buildings where sound is important. The shape of an object determines which way sound bounces off of it. Two years ago, a pair of researchers from France discovered that they could use sound to determine the shape of an object as it moves around in a tank of water. This finding suggested the possibility of using sound as a way to identify and count different species of fish in the ocean automatically. Fish can be hard to handle, however, so the researchers chose to work first with people. In one experiment, people walked around inside a hard-walled room, while the scientists used microphones to record echoes of sounds produced by speakers. Participants ranged in age from 3 to 55 years. Analyses of the results showed that each person reflected sound in the same way as would an egg of his or her size. From the viewpoint of sound waves, most of us would have shapes that are somewhat taller and thinner than an average egg. Now, would you like your sounds scrambled, boiled, or fried?—E. Sohn
Echoes of a Stretched Egg
