Sound Waves
声波
Sound is energy.
声音就是能量。
It is created by vibrating objects.
它是由振动的物体产生的。
A vibrating object creates sound waves.
振动的物体产生声波。
Sound waves can travel through solids, liquids, and gases.
声波可以穿过固体、液体和气体。
Sound waves enter our ear and then our eardrum.
声波进入我们的耳朵，然后进入我们的鼓膜。
Our brain then hears the sound.
然后我们的大脑听到声音。
If you tap an object, it does not vibrate much and so a soft sound is made.
如果你敲击一个物体，它不会振动太多，所以会发出柔和的声音。
If you hit an object, it vibrates a lot and so a loud sound is made.
如果你击中一个物体，它会剧烈震动，所以会发出很大的声音。
It is easier to hear a loud sound than a soft sound.
听到响亮的声音比听到柔和的声音容易。
When you speak, shout, or whisper, sound waves come out of your mouth.
当你说话、喊叫或耳语时，声波会从你的嘴里发出。
These sound waves travel to others and they can hear you.
这些声波传播给其他人，他们能听到你。
This is how we communicate with others.
这就是我们与他人交流的方式。
Sound waves can bounce off objects.
声波可以在物体上反弹。
If you clap your hands in a room, you might hear an echo.
如果你在房间里拍手，你可能会听到回声。
The sound waves bounce off the wall back to you.
声波从墙上反弹回来给你。