1) This document discusses a technology that can convert sound energy into electrical energy using a piezoelectric effect. Researchers from Texas and the University of Houston developed this concept using piezoelectric materials around 21 nanometers thick. 2) The technology works by using piezoelectric nanogenerators that convert mechanical energy from vibrating sound absorbing pads and zinc electrodes into electrical energy to charge batteries. 3) This sound-powered technology could allow devices to be charged using ambient sounds and has applications to capture wasted noise energy from traffic or other sources for power generation.

2. Guided by,
Mrs.ANILA MOL
Asst.professor
ECE
LMCST
PRESENTED BY,
ALEX M CHACKO
S7 ECE
ROLL NO: 11
LMCST

3. INTRODUCTION
.
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4.  It is one of the new developed technology.
 Researchers from Texas , &university of
Houston working on just such a concept back in
2013.
 They focused on a certain type of piezoelectric
material at around 21 nanometer thick.
 South Korean researchers developed the
effective method.
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5.  You have probably heard of renewably energy source like
solar , wind,…
 Have you ever thought about sound energy?
 Sound that always exists in our everyday life and
environments has been overlooked as a source.
 This motivated us to realize power generation by turning
sound energy from speech , music into electrical power.
 Sound pollution is a great disadvantage that we come
across our daily life.
 But using this technology we can convert this great
disadvantage to our use
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6. WORKING PRINCIPLE
 It works on the principle of piezo electric
phenomenon.
 The generation of an electric charge in certain non
conducting material when they are subjected to
mechanical stress is called piezoelectric effects
(conversion of ME to EE)
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7. What is piezo ?
 Piezo is used to describe the materials that accumulate a
charge as a result of piezoelectric effect.
 Piezo material , including crystals and ceramics generate a
voltage in response to an applied mechanical force.
 In reverse piezoelectric effect, these same material will
lengthen or shorten in response to an applied voltage.
 The voltage at force generated by piezo material are small
and usually required amplification.
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8. 6
WORKING OF PIEZO
stress
voltmeter

9. COMPONENTS
Sound absorbing pads
Zn electrodes
Nano- generator
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10. 8

11. Environment-friendly
Shock resistant
Moisture proof
Heat insulation, acid-base
resistant
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ABSORBING PLATES

12. These electrodes contains nano
generator between them these electrodes
vibrate when sound waves hit on it .
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ZINC ELECTRODES

13. 11
NANO GENERATOR
o Converts mechanical energy into electrical energy.

14. CONSTRUCTION
 Tiny strands of zinc oxide sandwiched between two
electrodes.
 A sound absorbing pad is placed on the top of zinc oxide.
 Nano generator is placed between the sandwiched zinc
oxide and electrode.
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16. WORKING
 Sound waves are given as input and we get electrical
energy as output.
 When the sound waves are hit on the sound
absorbing pad, it will vibrate.
 This result in the tiny zinc oxide wires to compress
and release.
 This given to the Nano generator.
 It convert the given ME To EE.
 The generated electrical energy is used to charge
the battery.
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17.  Sound wave of 100 decibels produced an electric
current of about 50 millivolts
 Normal conversation is conducted at about 60-70
decibels.
 5-12 volts needed to properly charged the typical
mobile device.
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18. 16
ADVANTAGES
 Mobile phones can be charged while calling.
 External power supply is not required
 We can use any of the following sound
sources to charge..
• Background noise and music
• Industrial noise
• Noise created by traffic, trains..
 Conventional energy sources can be
preserved

19. DISADVANTAGES
 It is expensive.
 Construction is difficult.
 Only possible for low voltage application.
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20. SCOPE FOR FUTURE
 Sound insulating walls near highways and airports to
produce electricity for lightning and other use.
 Recharge electric cars by tapping into the energy in
traffic noise.
 Both reducing noise levels and capturing wasted
energy.
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21. CONCLUSION
 Sound pollution is a great disadvantage that we
come across our daily life.
 By using this great disadvantage to our use.
 Voice usage to charge mobile phones creates a new
era with cleanly environment along with saving
energy.
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22. REFERENCE
 www.Seminarpaper.com
 www.Authorstream.com
 www.Gizmag.com
 www.Pptsforece.blogspot.com
 www.Wikipedia.com
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QUERIES???