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प्रश्न
What are infrasonic waves?
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उत्तर
The waves of frequency below 20 Hz are called infrasonic waves.
संबंधित प्रश्न
Why are the ceilings of concert halls curved?
The human ear can detect continuous sounds in the frequency range from 20 Hz to 20,000 Hz. Assuming that the speed of sound in air is 330 ms1 for all frequencies; calculate the wavelengths corresponding to the given extreme frequencies of the audible range
Name the characteristic of sound in relation to its waveform
Define wave velocity term in relation to a wave.
Write the approximate value of the speed of sound in air.
What is meant by echo depth sounding?
State two factors on which the natural frequency of a body depends.
(i) A man stands at a distance of 68 m from a cliff and fires a gun. After what time interval will he hear the echo, if the speed of sound in air is 340 ms−1?
(ii) If the man had been standing at a distance of 12 m from the cliff would he have heard a clear echo?
What is mean by the reflection of sound?
