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Science / Sound

Science / Sound

  • How do you come to know that a class is over in your school? You hear the sound of a school bell.
  • You come to know that someone is at your door when he knocks or you hear the sound of the doorbell.
  • Sound is a form of energy and it comes from vibrations. These vibrations create sound waves which move through mediums such as air and water before reaching our ears.
  • Understand how sound waves come from vibrations and how your ears give you the ability to hear them.
  • The difference between musical sound and noise:
  • Music is produced by periodic vibrations, having regular wave pattern e.g. sound of musical instruments. 
  • Noise is produced by irregular vibrations, having irregular wave pattern. e.g. sound produced by moving vehicles.
  • Human sound is produced by the vibrations of the vocal cords inside the larynx. Learn about the characteristics of sound.
  • Loudness - distinguishes between loud and feeble sounds.
  • Pitch - It distinguishes between shriller and flatter sounds.
  • Timbre or quality - It distinguishes one sound from another having same loudness and pitch.
Exercises
Lessons
Topics
Exercises
Lessons
Topics
  • Sound - SmartTest

    Sound

    • Accessed by: 510 Students
    • Average Time: 00:06:18
    • Average Score: 56.57
    • Questions: 33
    • Introduction to Sound
    • Propagation of sound
    • Introduction to terms- amplitude, frequency & wavelength
    • Characteristics of sound - loudness, pitch & quality
    • Measurement of sound
    • Musical sound and noise pollution
    • Sources of Sound
    • Production of sound
    • Types of sound
    • Musical instruments
    • Review of Sound
    • Speed of sound
  • Introduction to Sound

    Learnhive lesson on Introduction to Sound.

    • Accessed by: 722 Students

    Sound -- Summary

    Learnhive Lesson on Sound

    • Accessed by: 178 Students

Factoids

Some animals can hear sounds of frequencies higher than 20,000 Hz. Dogs have this ability. The police use high frequency whistles which dogs can hear but humans cannot.

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