Question
What is articulate sound? What is the minimum distance of reflector from the source to hear the echo of articulate sound?
Solution
The sound which requires negligible sound to produce is called as articulate sound.
Let the minimum reflector be at a distance d from the source and observer.
The time after which the reflected sound is received back is,
where,
v is the velocity of sound.
To hear an echo, t ≥ 0.1s.
That is,
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Thus, the minimum distance of reflector to produce echo should be 17m.
Let the minimum reflector be at a distance d from the source and observer.
The time after which the reflected sound is received back is,
where,
v is the velocity of sound.
To hear an echo, t ≥ 0.1s.
That is,
Thus, the minimum distance of reflector to produce echo should be 17m.
