Question
What is syllable sound? What is the minimum distance of reflector from the source to hear the echo of monosyllabic sound?
Solution
A sound which requires some time to produce is known as syllable sound.
Monosyllabic sound takes 1/5 second to produce.
Thus the echo of monosyllabic sound will be heard only if it is received back after 1/5 second.
Let the reflector be at a minimum distance of 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 echo of monosyllabic sound, t ≥ 0.2s.
i.e.,
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Thus the minimum distance of reflector should be 17m.
Monosyllabic sound takes 1/5 second to produce.
Thus the echo of monosyllabic sound will be heard only if it is received back after 1/5 second.
Let the reflector be at a minimum distance of 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 echo of monosyllabic sound, t ≥ 0.2s.
i.e.,
Thus the minimum distance of reflector should be 17m.
