Sound Energy To Light Energy: How to Convert, Examples And Facts

In this article, we shall discuss how to convert sound energy to light energy along with examples and detailed facts.

There are very few direct methods to convert the sound energy to light energy while there are some indirect methods to which the sound energy is transformed into some other form of energy before converting it to light energy.

How is sound energy converted to light energy?

Sound energy is vibrational energy and needs a medium to travel through.

The vibrations produced in the molecules of a system induce the flow of charges in the conductor thus producing the electrical energy. The vibration also introduces the frictional energy which generates the radiant energy.

Sound Energy to Light Energy Examples

Here is a list of examples of sound energy to light energy that we are going to discuss further in this topic:-

Mantis Shrimp

These shrimps are found in seawater and are locomotive at a very high speed and use sonic shock waves to catch their prey.

sound energy to light energy
Mantis Shrimp; Image Credit: pixabay

The molecules in the water collide with each other radiating the energy in the form of light for a few picoseconds.

Hitting Hammer on the Nail

Upon hitting the hammer on the nail the sound energy is produced. The surface of the hammer and the nail rubs together giving frictional energy. A part of the energy is lost in the form of heat. The excitation of the electron produces the spark due to heat energy.


As the ions of water molecules get charged, they are ready to discharge the electrons cloud producing a loud noise of thundering. When the electrons get discharged they emit the energy in the form of light energy.

It releases a huge amount of energy and heat energy radiating the light energy. This leads to the emission of hazardous gases and particles in the atmosphere unhealthy for breathing.

Volcanic Eruption

As the magma erupts on the Earth’s surface making the cleavages on the surface or mountain cliff, the sound energy is created. The light energy is given out by the excitation of the particles from the magma.

Burning Wood

The combustion of wood produces a sound of low frequencies generating the pressure difference and releasing the heat energy in the surrounding. The combustion of the wood gives out light energy.


The welding produces a glow of light due to the excitation of electrons from the metal rod used for welding.

Welding; Image Credit: pixabay

This produces sound energy while hammering and as the energy is released during the excitation of electrons.

Piezoelectric Material

This is used for the piezoelectric effect in the material which converts the sound energy to the electrical energy which can then be converted into light energy. The sound waves are incident on the piezoelectric material that introduces the vibrations of the molecules in the material generating the electrical energy.

LED Bulb with Transducer

The transducer is used to convert sound energy into various forms of energy. The sound waves can be converted into electrical energy using a transducer which is further used to radiate the LED bulbs giving the light energy.

Streetlight using Rectifier Bridge

The vehicles migrating on the street produce a sound. The sound wave incident on the piezoelectric material imposes a pressure thus resulting in the generation of electric current which is rectified by the rectifier bridge circuit radiating the streetlight.

Musical Lights

The serial LED light blinks as per the rhythm of the music. It uses electrical signals or a microphone to send signals to the light display.


The blowing wind accelerates the wind turbine into rotational motion.

Windmill; Image Credit: pixabay

The rotation of the propellers undergoes wind abrasion and friction producing sound energy. This is converted to electrical energy by the generator. This is supplied to radiate the electric bulb.


On rubbing the potassium lead of the matchstick on the surface of the box the sound energy is produced due to friction. This is then converted into light energy as the matchstick catches fire.

Water Turbines

The mechanical energy of the water produces sound energy when turned on the turbine. The mechanical energy is converted into electrical energy by the generator and is used in the household supply.


The sound energy is produced as the motor starts rotating. This mechanical energy of the motor is converted into electrical energy which can be used to convert into light energy.


The coil in the generator perturbs the magnetic flux line thus it starts vibrating producing sound energy. The generator generates electrical energy that can be converted into light energy.

Igniting Stones

You rub the surfaces of the rocks across each other, and as the free electrons get heat energy due to friction, they start exciting and radiate light.

Frequently Asked Questions

How does sound energy generate?

The sound energy traverses through the longitudinal wave.

Sound energy is generated by vibrational motion. The vibration produces longitudinal waves setting the molecules into back and forth motion.

How does sound energy propagate?

The sound wave transmits the energy to the molecules in the medium through which it is propagating.

The energy acquired by the molecules in the medium is transferred to each subsequent molecule oscillating the molecules back and forth in the longitudinal wave.


Hi, I’m Akshita Mapari. I have done M.Sc. in Physics. I have worked on projects like Numerical modeling of winds and waves during cyclone, Physics of toys and mechanized thrill machines in amusement park based on Classical Mechanics. I have pursued a course on Arduino and have accomplished some mini projects on Arduino UNO. I always like to explore new zones in the field of science. I personally believe that learning is more enthusiastic when learnt with creativity. Apart from this, I like to read, travel, strumming on guitar, identifying rocks and strata, photography and playing chess. Connect me on LinkedIn -

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