Sound Energy – sound energy definition, examples & facts

Sound energy is a form of energy that can be heard by the human ear. Sound is a mechanical wave so it needs medium for their propagation. It consists physically in oscillatory elastic compression and in the oscillatory displacement of a fluid. So the medium acts as storage for both kinetic and potential energy.

Sound Energy

Sound Energy

Consequently, the sound energy is defined as the sum of the potential and kinetic energy densities integrated over that volume:


  • cis the speed.
  • Vis the interest of volume;
  • pis the pressure of sound ;
  • vis the velocity ;
  • ρ0is the density of the medium when no sound present;
  • ρis the actual density of the medium;

Sound Energy Facts

It is a form of energy that is associated with the vibrations of particles present in matter. it requires an object or medium to travel because it is a type of mechanical wave. This object also includes both air and water. Sound energy travel faster in solids than liquid and gas. Sound originates from the vibrations when an object applies a force to another object.

Interesting Sound Energy Facts:

Sound produces a low level of energy as compared to other forms of energy.

So that’s why it is not used for the production of electricity.

If there is a change in vibrational waves of a medium with respect to time than the sound that it produces will also change.

Sound is measured in pascals and decibels instead of a joule.

The intensity of sound energy is usually measured by using the perception of a normal hearing level.

The sound energy is measured to its pressure and intensity value.

We are able to hear the different sounds because as the sound enters our ear, then our ear also starts to vibrate.

The sound does not travel through space because there is no object for sound to travel through.

Sounds travel through a solid faster than through liquid and air.

The speed of sound is 767 miles per hour.

Sound energy travels faster through liquid than it travels through the air.


sound energy examples

  • A ballerina dancing in toe shoes
  • A balloon popping
  • Someone shuffling cards
  • The bell dinging on a microwave
  • A boom box blaring
  • A broom swishing
  • A buzzing bee
  • Car brakes squealing
  • A flag flapping in a strong breeze
  • A car crashing
  • A car door closing
  • A car engine
  • An air conditioning fan
  • A car horn
  • Champagne glasses clinking in a toast
  • Clog dancing
  • Computer mouse clicking
  • A copier machine
  • A diver splashing into water
  • Doorbell chiming
  • A dripping faucet
  • A foghorn
  • Firecrackers popping
  • An open fire crackling
  • Fireworks exploding
  • Flamenco dancing
  • A hairdryer
  • A jackhammer
  • Jingle bells
  • Meat sizzling on the grill
  • Paper crumpling
  • Paper tearing
  • Pouring milk into Rice Krispies™ cereal
  • Radiator pipes clanking
  • A radio
  • Railroad crossing signal
  • The siren on a fire engine
  • A slinky in motion
  • Smoothing wood with sandpaper
  • A sonic boom
  • A tap dancer
  • A tea kettle whistling
  • Tires squealing when racing
  • A train moving on the tracks
  • Vacuum cleaner
  • Walking in autumn leaves
  • Water boiling
  • A waterfall
  • Waves crashing into a rocky shore
  • A whistle
  • Windchimes


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