Vitamin D-licious Mushrooms
Microbes at the Gas Pump
Cleaning Up Fish Farms
Salamanders and Newts
Tree Frogs
Walks on the Wild Side
The Secret Lives of Grizzlies
Staying Away from Sick Lobsters
The Electric Brain
Newly named fish crawls and hops
Math Naturals
Chemistry and Materials
Earth-Friendly Fabrics
Atom Hauler
Hitting the redo button on evolution
A Classroom of the Mind
New twists for phantom limbs
Look into My Eyes
Dinosaurs and Fossils
Mammals in the Shadow of Dinosaurs
Dinosaur Eggs-citement
The bug that may have killed a dinosaur
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
Deep Drilling at Sea
Coral Islands Survive a Tsunami
Hot Summers, Wild Fires
Cactus Goo for Clean Water
Spotty Survival
The Wolf and the Cow
Finding the Past
Watching deep-space fireworks
A Long Haul
The Puzzle of Ancient Mariners
Nurse Sharks
Electric Ray
Angler Fish
Food and Nutrition
Eat Out, Eat Smart
Sponges' secret weapon
Chew for Health
GSAT English Rules
Finding Subjects and Verbs
Problems with Prepositions
GSAT Exam Preparation Jamaica
How are students placed after passing the GSAT exam
Scotiabank Jamaica Foundation Grade Six Achievement Test (GSAT) Scholarships
Mastering The GSAT Exam
GSAT Exams Jamaica Scholarships
GSAT Scholarship
GSAT Practice Papers | GSAT Mathematics | Maths
42,000 students will sit for the GSAT Exam in two weeks
GSAT Mathematics
How a Venus Flytrap Snaps Shut
Math is a real brain bender
Deep-space dancers
Human Body
Spit Power
Fighting Off Micro-Invader Epidemics
Teen Brains, Under Construction
Children and Media
The Surprising Meaning and Benefits of Nursery Rhymes
What Not to Say to Emerging Readers
IceCube Science
Powering Ball Lightning
Spin, Splat, and Scramble
Springing forward
Tracking the Sun Improves Plant Pollen
Stalking Plants by Scent
Black Mamba
Komodo Dragons
Space and Astronomy
A Galaxy Far, Far, Far Away
A Very Distant Planet Says "Cheese"
Sounds of Titan
Technology and Engineering
Supersuits for Superheroes
Dancing with Robots
Weaving with Light
The Parts of Speech
What is a Preposition?
Adjectives and Adverbs
Middle school science adventures
Morphing a Wing to Save Fuel
Flying the Hyper Skies
The solar system's biggest junkyard
Weekend Weather Really Is Different
Warmest Year on Record
Add your Article

Echoes of a Stretched Egg

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
Echoes of a Stretched Egg

Designed and Powered by™