声音-拓展阅读
点击数:30
DEFINITION OF SOUND
Sound is caused by vibrations that travel through the air. These vibrations can cause other things to vibrate, too. We hear sound with our sense of hearing, which is made possible by our ears.
To better understand how sound works…
Instruments make vibrations.
When you play an instrument such as a guitar, you are causing vibrations that make sound. The guitar strings move back and forth really fast when you pluck the