Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.



Published on

Published in: Education
  • Be the first to comment


  1. 2. <ul><li>Sound is mechanical energy which produces sensation of hearing. </li></ul>
  2. 3. <ul><li>REFLECTION OF SOUND </li></ul>
  3. 4. <ul><li>Reflection of sound includes: </li></ul><ul><li>▪ ECHO </li></ul><ul><li>▪ REVERBERATION </li></ul>
  4. 5. <ul><li>Like light waves sound also follows the same </li></ul><ul><li>laws of reflection: </li></ul>
  5. 6. <ul><li>An echo is the phenomenon of repetition of </li></ul><ul><li>Sound of a source by reflection from an obstacle </li></ul>
  6. 7. <ul><li>Echolocation – It is system using by some animals to transmit and receive ultrasonic signals. Used for navigation and hunting of prey </li></ul>
  7. 8. <ul><li>Some applications of echo : </li></ul><ul><li>▪ To find submarines from surface ships </li></ul><ul><li>▪ In fishing boats, to find large shoals of fish. </li></ul><ul><li>▪ To measure the depth of the sea. </li></ul><ul><li>▪ To locate a sunken ship wreck. </li></ul>
  8. 9. <ul><li>▪ The phenomenon of persistence or prolongation of audible sound after the source has stopped emitting sound is called reverberation. </li></ul>
  9. 10. <ul><li>Some ways to reduce reverberation are: </li></ul><ul><li>▪ The floor is carpeted. </li></ul><ul><li>▪ The furniture is upholstered. </li></ul><ul><li>▪ False ceiling of a suitable sound absorbing </li></ul><ul><li>material is used. </li></ul>