4. Find the odd one out. Give a reason for your choice.
(a) Pitch, loudness, timbre, wavelength
(b) Pitch, shrill, bass, loudness.
(c) Echo, reflection of sound, bats, parrots.
(d) Loudspeaker, music system, ear plugs, supersonic plane.
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When you are in school, you come to know when the period gets over. When someone rings the doorbell at your door you can hear the sound. Suppose if someone approaching you, you can make it out by hearing the footsteps itself. Sound plays an important role in our daily lives. You hear many types of sound in our surroundings. How is the sound audible to you? Let us discuss these characteristics of sound in detail
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