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Sound Definition

Sound is a noise we can hear. For example, plucking strings produces sound.

View Lesson on Introduction to Sound
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Introduction to Sound

LESSON MATERIALSmove

Fun Facts

  • Loud sounds can make nearby objects vibrate or even break glass.
  • The thickness of guitar strings affects the sound's vibration speed.
  • Drums and cymbals vibrate differently, creating distinct sounds.

Why Do We Need To Know About Sound

Learning about sound helps us know how vibrations let us talk and listen. This is key for jobs in understanding language, helping people speak better, and working in radio or TV. Vibrations making sound helps us communicate every day and is important for many kinds of work.

This knowledge is also important in healthcare, especially for doctors who help people with hearing problems. Making musical instruments relies on understanding how sound works. Studying sound is useful for many careers.

Frequently Asked Questions

Why can’t we always see vibrations that sounds make?
They can happen really fast, sometimes thousands of times each second.
If we can’t see vibrations, how do we know they are happening?
We can make vibrations visible in many ways such as using a tuning fork and putting it in water. You can also feel your own throat while humming or putting paint inside a speaker. You can also film things vibrating with a special slow motion camera.
Why do we feel vibrations when we hum?
When your vocal cords vibrate, they make sound. Anytime you speak, your vocal cords are vibrating. The shape of your tongue and mouth also help you make different sounds.
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