Which of the following statements is true regarding sound?

The statement regarding sound that is true is that all sounds are generated by vibrations. This concept is fundamental to understanding how sound works. Sound is produced when an object vibrates, creating waves in a medium, such as air, water, or solids. These vibrations disturb the surrounding particles, which then transmit the sound waves to our ears, where they are interpreted as sound.

Vibrations can originate from various sources, such as musical instruments, vocal cords, and everyday objects, making this statement universally applicable to all sound production. The underlying principle is that without vibrations, there would be no sound to hear, as sound waves rely on the movement of particles to propagate through a medium.

In contrast, the other statements are based on misconceptions. For example, the relationship between amplitude and frequency, as well as the misapplied concept of hertz, which is actually a unit of frequency rather than sound intensity, further highlight why this statement stands out as accurate.