Question

what you learn from the chapter sound class 8 ​

Answer 1

Answer:

When sound waves are spread out, the sound we hear is quiet. When they are clumped together, the sound is much louder. When sound waves enter your ear, they hit your eardrum and make it vibrate. ... The nerves take them to your brain where they turn into the sound that you hear!

Answer 2

The effect created by the to-and-fro motion of particles in any medium is what we hear.

Explanation:

• Sound travels across a medium by expanding and contracting the areas of the medium it passes through on a regular basis. We hear sound as a minute variation in pressure caused by compression and expansion.
• As a result, it is a mechanical displacement and pressure wave. To put it another way, the sound is the narrow boundary that separates Music from Noise.
• Sounds come in a variety of shapes and sizes, depending on the pitch, loudness, frequency, and amplitude of the sound wave, but not all of them are pleasing to our ears. The varieties of sound are broadly classed into noise and music, depending on whether we enjoy it or not.