What should be the time interval between the original sound and the echo to hear an echo?
To hear an echo distinctly, the time interval between the original sound and the echo should be more than 1/10 seconds. This time delay allows the reflected sound waves to travel a sufficient distance before reaching the listener’s ears, ensuring that the echo is perceptible and distinguishable from the original sound.
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To hear an echo clearly, the time interval between the original sound and its reflected echo should be [C] more than 1/10 seconds. This time delay is necessary for the sound waves to travel to a reflecting surface and back, creating a perceptible gap between the original sound and its echo.
If the time interval is less than 1/10 seconds (option [B]), the reflected sound waves return too quickly to be distinguished as an echo. In contrast, a delay of more than 1/10 seconds (option [C]) allows for a noticeable echo effect. This phenomenon is crucial in acoustic environments where echoes contribute to the perceived spaciousness and quality of sound.
Understanding the appropriate time interval for echo perception helps in designing spaces where echoes enhance rather than distort sound clarity, such as concert halls and auditoriums.