Sound can be defined as an energy wave of molecules that is made by vibrations. It can travel through and bend around many objects. Water is one of those objects. A sound is generally audible to human ear if its frequency lies from 20 to 20,000 vibrations per second. The sound wave that has frequency less than 20 vibrations per second is known as subsonic waves and that has frequency more than 20,000 vibration per second is known as ultrasonic waves. Graphical representation of sound waves is a wavy, horizontal line in which the upper part indicates a condensation and the lower part indicates a rarefaction.
Fun Facts: –
- Sound travels with a speed of 767 miles per hour but it cannot travel through a vaccum.
- The scientific study of sound waves is known as acoustic.
- These waves are also known as pressure waves because they push the particles they are passing through.
- Dogs can hear at a higher frequency as compared to humans. It allows them to hear some sounds that we can’t.
- These waves are generated by any vibrating body.
- The velocity of sound is not constant. It varies on the basis of various factors like medium and temperature.
- These waves can be reflected, refracted or absorbed similar to light waves.
- Wind originally has no sound. A sound is created only when wind blows against an obstacle.
- The loudest natural sound on earth is of a volcano eruption.
- Animals that have large ears can hear better as compared to animals with small ears.
- Flies cannot hear at all.
- The sound energy is measured on the basis of its pressure and intensity.
- There is no sound in space because there is no object available for sound to bounce off.