A sound always starts with a vibration: an object moving very quickly back and forth.
🎸 See and feel
Pinch a stretched rubber band: you see it blur, and you hear a sound. Put your hand on your throat while speaking: you can feel the vibration.
🌊 The journey of sound
Vibrations travel through air, water, and solids in the form of waves. They need a medium: in a vacuum, there is no sound.
🎵 Low or high-pitched?
A short rubber band makes a high-pitched sound, while a long rubber band makes a low-pitched sound.
🤯 Did you know?
Sound travels at about 340 m/s in the air, much slower than light. That's why we see lightning before we hear thunder!
🧪 String telephone: two cups connected by a tight string. Speak into one: your friend hears you through the other. Shop the whole collection
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