<ul><li>Sound is mechanical energy which produces sensation of hearing. </li></ul>
<ul><li>REFLECTION OF SOUND </li></ul>
<ul><li>Reflection of sound includes: </li></ul><ul><li>▪  ECHO </li></ul><ul><li>▪  REVERBERATION  </li></ul>
<ul><li>Like light waves sound also follows the same </li></ul><ul><li>laws of reflection: </li></ul>
<ul><li>An echo is the phenomenon of repetition of  </li></ul><ul><li>Sound of a source by reflection from an obstacle  </...
<ul><li>Echolocation – It is system using by some animals to transmit and receive ultrasonic signals. Used for navigation ...
<ul><li>Some applications of echo :  </li></ul><ul><li>▪  To find submarines from surface ships </li></ul><ul><li>▪  In fi...
<ul><li>▪ The phenomenon of persistence or prolongation of audible sound after the source has stopped emitting sound is ca...
<ul><li>Some ways to reduce reverberation are: </li></ul><ul><li>▪  The floor is carpeted. </li></ul><ul><li>▪  The furnit...
 
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Sound

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Sound

  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>
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