This document discusses devices that can convert sound energy into electricity. It describes three main devices - the transistor TIP 31, piezoelectric crystal transducer, and Sonea - along with their basic workings. Potential applications are also explored, such as harvesting ambient noise from footsteps or busy streets to power devices, or using the heartbeat or voice of an individual to charge a phone wirelessly. The document concludes by asking if readers have any other questions.

1. PREPARED BY ADRITA MAJUMDER DEPARTMENTOF ECE , SEM 4
ROLL NUMBER 08
SOUND ENERGY
AND
ELECTRICITY

2. INTRODUCTION

3. TRANSISTOR TIP 31DEVICE 1
PIZOELECTRIC CRYSTAL TRANSDUCERDEVICE 2
SONEADEVICE 3
DEVICES THAT CONVERT
SOUND TO ELECTRICITY

4. TRANSISTOR TIP 31

5. PIZOELECTRIC CRYSTAL
TRANSDUCER

6. SONEA

7. Charge
your
phone
With your
heartbeat
By your words
Lighting
by led
Harvesting sound
from chaos
From music beat
Storage
of energy
for future
Harvesting sound
in a busy street
APPLICATIONS

8. THE POWER OF FOOTFALL
HARNESSED

9. WILL YOUR NEXT PHONE BE
CHARGED WITH YOUR HEART
BEAT ??

10. YOUR WORDS CHARGE YOUR
PHONE !!!

11. LIGHTING OF LED BY SOUND

12. CONCLUSION

13. THANK YOU, ANY QUERY ??