SCIENCE
PHYSICAL SCIENCES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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frequency
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sound
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pitch
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an echo
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Detailed explanation-1: -An echo is a sound that is repeated because the sound waves are reflected back. Sound waves can bounce off smooth, hard objects in the same way as a rubber ball bounces off the ground. Although the direction of the sound changes, the echo sounds the same as the original sound.
Detailed explanation-2: -Acoustics / Electroacoustics. An echo is a repetition or a partial repetition of a sound due to REFLECTION. REVERBERATION is also reflected sound, but in this case, separate repetitions of the original sound are not distinguishable.
Detailed explanation-3: -When we shout in a large or vacant space, the sound is reflected back. Suppose you are standing in front of a high wall and clap your hand, you can hear the same sound of the clap back again. This is an echo.