Same chapter3 marksDifficulty: Medium
What is an echo, and state two of its practical uses.
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3 marksDifficulty: Medium
Distinguish between a musical sound and a noise.
Original Khojo Papers practice question — not from a past board paper.
Answer
A musical sound is pleasant to hear and is produced by regular, periodic and uniform vibrations of definite frequency. A noise is unpleasant and is produced by irregular, non-periodic vibrations with sudden changes of frequency and amplitude.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
The same source can produce either, depending on how it is made to vibrate.
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