Subject: Science

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Lesson Info

  • Notes 2
  • Videos 5
  • Exercises 32
  • Practice Test 17
  • Skill Level Medium


Upon completion of this lesson, student must be able to:

  • Define sound along with its properties such as amplitude, frequency and time period.
  • Define sources of sound.
  • Define echo and reverberation and differentiate between them.
  • State the method of transmission of sound.
  • Solve numerical related to sound.



A sound wave is a periodic disturbance which travels through a medium transferring energy from one point to another without causing any permanent displacement of the medium. Sound needs a medium to travel. This note explains us about sound, echo, reverberations and absorption of sound along with its measuring components. Learn More

Reflection of Sound

Echo is the reflection of sound by a hill or a large building some distance away. When sound falls on a surface, it is partly reflected and partly absorbed. If there are a number of reflecting surfaces near one another, a series of reflection takes place. Such sound is called reverberation. This note provides information about echo, application of echo, absorption of sound, reverberations and some numerals. Learn More

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