Springing forward
Getting the dirt on carbon
Seeds of the Future
Salamanders and Newts
Tree Frogs
Jay Watch
Crocodile Hearts
Staying Away from Sick Lobsters
The Colorful World of Synesthesia
A Global Warming Flap
Storing Memories before Bedtime
A Meal Plan for Birds
Chemistry and Materials
Watching out for vultures
When frog gender flips
Heaviest named element is official
Supersonic Splash
Fingerprint Evidence
The hungry blob at the edge of the universe
Dinosaurs and Fossils
Dino Flesh from Fossil Bone
Battling Mastodons
Ferocious Growth Spurts
E Learning Jamaica
Results of GSAT are in schools this week
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
2014 GSAT Results for Jamaican Kids
Greener Diet
In Antarctica watch the heat (and your step)
Slip Slidin' Away—Under the Sea
Catching Some Rays
Pollution Detective
Seabirds Deliver Arctic Pollutants
Finding the Past
Chicken of the Sea
Stone Tablet May Solve Maya Mystery
The Puzzle of Ancient Mariners
Mako Sharks
Pygmy Sharks
Food and Nutrition
How Super Are Superfruits?
Strong Bones for Life
Chocolate Rules
GSAT English Rules
Capitalization Rules
Who vs. That vs. Which
Whoever vs. Whomever
GSAT Exam Preparation Jamaica
GSAT Practice Papers | GSAT Mathematics | Maths
GSAT stars reap scholarship glory
Results of GSAT are in schools this week
GSAT Exams Jamaica Scholarships
42,000 students will sit for the GSAT Exam in two weeks
GSAT Scholarship
Results of GSAT are in schools this week
GSAT Mathematics
GSAT Practice Papers | GSAT Mathematics | Maths
Math of the World
Math and our number sense:
Human Body
Don't Eat That Sandwich!
Gut Germs to the Rescue
Taste Messenger
Sea Urchin
African Elephants
Scottish Folds
Raise a Lifelong Reader by Reading Aloud
Children and Media
What Not to Say to Emerging Readers
Black Hole Journey
Hold on to your stars, ladies and gentlemen
Speedy stars
Seeds of the Future
Sweet, Sticky Science
Surprise Visitor
Garter Snakes
Space and Astronomy
Phantom Energy and the Big Rip
Tossing Out a Black Hole Life Preserver
An Icy Blob of Fluff
Technology and Engineering
Spinach Power for Solar Cells
Machine Copy
Slip Sliming Away
The Parts of Speech
What is a Noun
What is a Preposition?
Adjectives and Adverbs
Robots on the Road, Again
Revving Up Green Machines
Morphing a Wing to Save Fuel
A Dire Shortage of Water
Warmest Year on Record
Arctic Melt
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™