1. Elimination of Sound Energy Losses

2. CONTENT Introduction What Is Sound
To Eliminate Sound Energy Losses We Should Know How It Propagate
Energy Loss Detection
Sound Waves May Be Used To Generate Energy And Produce Weapons
Conversion Of Sound Energy To Electric Energy
Method I:-
Method II:-
Method III :-
Other Application Of Sound Energy
Merits And Demerits
References

3. INTRODUCTION
In this 21st century electric power has very deeply indulged in our society... life without your computer , mobile , Lights , And other daily used appliances , it is really very hard to imagine our life without these electric appliances. Actually today, the demand of electricity is continuously growing in this world and set to be doubled by 2030 So it is necessary to increase the supply of electric power for that it is very essential for us to find other alternative methods to produce electric-energy when we think of another method we think of solar energy, wind energy, hydro energy...but we forget ...sound energy In this century the most common thing we encountered everywhere (roads, airports, industries...) is noise pollution so a point comes in our mind whether is it possible to convert sound energy to electricity??? And this waste form of sound could be converted and used for some productive purpose, Let us see about it

4. WHAT IS SOUND It is form of Energy
It is the only way through which any creature existing in this world can communicate with each other
It is measured in decibels & sound perceptible by humans has frequencies from 20 Hz to 20,000 Hz
In air at standard Pressure and temperature the corresponding wave length of sound wave ranges from 17 mm to 17 m
It can be converted into various other forms of Energies such as Heat energy , Mechanical Energy and Electrical Energy etc

5. To Eliminate, Sound Energy Losses We Should Know How It Propagate
There are Several Important factors which affect the propagation of sound such as Geometric spreading, Atmospheric effects and Surface effects
Atmospheric Effect
Air Absorption
Wind and Temperature Gradients
Surface Effect
Ground Absorption
Attenuation due to Barriers and Trees

6. Ultrasound
Sound with frequencies higher than those that humans can hear is called ultrasound. When the compressed air passes into the atmosphere it changes from a pressurised laminar flow into a low-pressure turbulent flow, This turbulence creates “white noise” which contains ultrasound

7. Sound Waves May Be Used To Generate Energy and Produce Weapons
When high-powered infrasound was directed at the subjects, it caused internal bleeding and even destroyed body tissue and Ultimate death of a specimen
sound is also being used more constructively - promising to defeat noise pollution and even power engines in the future

8. It is discovered that cooling and heating gases could drive a piston, the thermo acoustic Stirling heat engine produces sound from heated helium within the engine, The sound waves then drive a piston which in turn generates electricity
A machine is also invented that lifts objects and moves them by acoustic levitation using supersonic waves which vibrate at the rate 20,000 times per second

9. CONVERSION OF SOUND ENERGY TO ELECTRIC ENERGY

10. Practically How It Could Be Achieved
In our daily use we use many products in which the conversion between sound energy and electric energy takes place For e.g.:- mice, speaker, mobile phone, transducers However the amount of conversion is very small and we require large amount of energy to convert it…so the problem is how we could convert efficiently, As sound wave is a mechanical wave when it travels through a medium it disturbs the particle of the medium these disturbance created by sound could be used to produce electricity

11. METHOD I
Suppose we create a very thin curtain like diphagram which will get fluctuated by the oscillation and pressure created by the sound wave and a conductor will be attached to it which will be placed between magnetic bars these fluctuation in the curtain will create a movement in conductor which will affect the magnetic field of the magnet which inturn will generate motional emf and voltage across it
But its limitation will be that it will be efficient only in the place where high decibel of sound is available
For example:- nuclear power plant, industries using huge and noisy machines etc.

12. METHOD II
As sound wave travel by oscillating the particles of the medium so when sound energy travel through the medium it will disturbs the particle of the medium these disturbance created by sound will be used to convert it into heat energy as when the particles of the medium will be pushed by the sound wave it will collide with adjacent particle of the medium this collision will result in production of heat energy the production of heat energy will be more in the denser medium So for more heat production we will need a material with very high density, This heat energy will be converted into electricity

13. As here the conversion is to be done two times so...
SOUND – HEAT – ELECTRIC
As here the conversion is to be done two times so...
This method is less efficient due to more energy losses taking place while conversion of sound energy to heat energy and then heat energy to electric energy then the other methods

14. METHOD III :-
Converting sound energy to electricity by piezo electric material (piezo electric materials are the crystal which convert mechanical strain to electric energy) Piezo electric materials are transducers its crystals could convert mechanical strain to electricity, The crystals are formed naturally e.g. quartz, bone whereas artificially ZnO , lithium ,Lead the sound energy could be converted into electricity using piezo electric material. Let us see the properties of piezo electric material

15. PIEZO ELECTRIC MATERIAL AND THERE PROPERTIES
when the crystal is mechanically strained or deformed by the application of an external stress (here sound energy) then, electric charges appear on the crystal surfaces;
And as the direction of the strain reverses, the polarity of the electric charge is reversed, This is called the direct piezo electric effect, and the crystals that exhibit it are classed as piezoelectric crystal
Inversely, when charges are applied by external means to a piezoelectric crystal faces, the crystal exhibits strain, i.e. the dimensions of the crystal Changes
The direct piezoelectric effect

16. So it could be seen that when the sound energy is applied to the piezoelectric material it create strain in the crystal then it reverse it and the strain is converted into electric energy, This direct piezo electric effect property of an piezo electric material could be used for making the device to convert sound energy to electric energy
The inverse piezo electric effect :-.
Piezo converter (srb)
A device could be made using piezo electric material which will collect the sound wave which are travelling near it and that sound wave will be used to cause a strain due to pressure created by its oscillation in the piezo crystal and will create the disturbance in its atoms resulting in the flow of electric charge on the surface of the crystal thus sound energy could be converted into electricity as the piezo electric material convert mechanical strain to electric energy

17. I. To Find Cracks In The Metals II. Use in medical Field
III. Conversion of Sound Energy into Different Forms

18. Other Application Of Sound Energy
Military application
Alternate source of energy
To Measure The Depth Of The Sea
In Medical Field
Way Of Communication

19. MERITS AND DEMERITS Merits Demerits
If we will be able to convert sound energy to electric energy efficiently it could help us to reduce the scarcity of electrical energy globally .
The noise pollution in the road would be able to convert into electric energy and lights the street lightning, signals and various other electrical appliances.
The electricity produce in nuclear power station could increase as the sound produce during nuclear fission also could be used to get more electric energy and reduction of CO2 as electric energy is one of the cleanest energy.
Lots of work is to be done in this field.
Its efficiency is not that good so improvement is being required.
It is bit costlier. As whole setup would be done.
It could not be used in the places where decibel of sound is very low.

20. CONCLUSION
As sound has enormous amount energy with it, it could be used by converting it into electric energy for various purposes. Sound energy is a mechanical energy so according to law of thermodynamics mechanical energy could be converted into electric energy
Sound energy could be converted by different methods
Method 1-by creating apparatus using curtain (diphagram) magnet and conductor
Methods 2-by converting Sound >heat energy & then heat energy>electric energy
Method 3-by using transducers such as piezo electric material which converts mechanical strain>electric energy and vice 4 versa
Piezo electric crystals are the crystals which converts mechanical strain to electric energy, The strain applied to piezo electric material by sound energy could be converted into electricity. In this aspect lot of research is to be done but on a positive note this could surely be done which could solve the energy problem of the entire world

21. THANK
YOU ...