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Sound

How vibrating bodies produce sound, how it travels through a medium as a wave, and what makes one sound louder, shriller or different from another.

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What this chapter covers

  1. Nature and Propagation of Sound

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    • Introduction to SoundEnergy from vibrating bodies; needs medium.
    • Propagation of Sound in AirCompressions and rarefactions travel as waves.

  2. Properties of a Wave

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    • Wave TermsAmplitude, time period and frequency.
    • Representation of a WaveDisplacement graphs against time and distance.

  3. Characteristics of Sound

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    • LoudnessDepends on amplitude of the wave.
    • PitchDepends on frequency; higher means shriller.
    • MonotoneSingle frequency, as from tuning fork.
    • QualityTells apart same pitch, same loudness.

Try a sample question

Through which of the following can sound NOT travel?

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