Explanation:
The statement mentioned is true. Here is a detailed explanation:
1. Sound and Vibrations:
- Sound is a form of energy that is produced when vibrations travel through a medium, such as air, water, or solids.
- Vibrations are the rapid back-and-forth movements of particles or objects, which create waves that transfer energy.
2. Propagation of Vibrations:
- When an object vibrates, it causes neighboring particles or objects to vibrate as well.
- These vibrations are transmitted through the medium in a wave-like manner, resulting in the propagation of sound.
3. How Sound Propagates:
- As the vibrating object moves back and forth, it compresses and rarefies the surrounding particles or molecules in the medium.
- This creates a series of compressions and rarefactions, forming a sound wave.
- The sound wave then travels through the medium, with particles oscillating around their equilibrium positions.
4. Characteristics of Sound:
- Sound waves have several characteristics, including frequency, wavelength, amplitude, and speed.
- The frequency determines the pitch of the sound, while the amplitude determines its loudness.
- The wavelength represents the distance between two consecutive compressions or rarefactions.
5. Perception of Sound:
- When sound waves reach our ears, they cause the eardrums to vibrate.
- These vibrations are then transmitted to the inner ear, where they are converted into electrical signals that are sent to the brain.
- The brain interprets these signals as sound, allowing us to perceive and understand it.
In conclusion, the statement is true as sound is indeed caused by the propagation of vibrations through a medium.