Define echo and its applications

Echo

  • An echo is a sound that is reflected off a surface and returns to the listener. 
  • It is created when a sound wave travels through a medium and bounces back after hitting a surface that is capable of reflecting sound. 
  • The time delay between the original sound and the reflected sound is what creates the echo.
ECHO

 


In physics, echoes have a variety of applications, including:

  • Sonar and radar: to determine the distance and shape of objects in the ocean or in the air.
  • Acoustic testing: to evaluate the sound quality of rooms, auditoriums, and concert halls
  • Wildlife management: to study the vocalizations of animals and their habitats
  • Geological exploration: to map the interior of the Earth, by analyzing the echoes of seismic waves.
  • Medical imaging: to examine internal organs, using ultrasound.