Who Invented the Gramophone?
Who Invented the Gramophone? Early attempts to design a music-playing gadget began in 1877 when Thomas Edison invented his tin-foil phonograph. The word ‘phonograph’...
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What Causes Sounds?
What Causes Sounds? All sounds are made by vibrations. Lightly place your fingers on your throat, and speak. The buzz you feel is your vocal cords vibrating. Stretch a...
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How Does a Rattlesnake Rattle?
How Does a Rattlesnake Rattle? It’s easy to recognize a rattlesnake by the rattle at the end of its tail. The rattle is a series of horny, cup-shaped rings that...
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What Makes an Echo?
What Makes an Echo? An echo is a sound that we hear after it is reflected, or bounced back, from some object. When we shout, sound waves travel through the air in all...
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Why Do We Hear the Sound of the Sea in a Seashell?
Why Do We Hear the Sound of the Sea in a Seashell? Perhaps you have had the fun of holding an empty seashell close to your ear and imagining that you heard the sound of...
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