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प्रश्न
उत्तर
The audience in the auditorium as act obstructions in the path of sound waves; so they sound waves are not reflected much less and hence the echoes usually decrease.
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संबंधित प्रश्न
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
Displacement distance graph of two sound waves A and B, travelling in a medium, are as shown in the diagram below.
Study the two sound waves and compare their:
1) Amplitudes
2) Wavelengths
A wave passes from one medium to another medium. Mention one property of the wave out of speed, frequency or wavelength which does not change.
Name the waves which are used in sonar to find the depth of a sea. Give one reason for their use.
What adjustments would you make for tuning a stringed instrument for it to emit a note of a desired frequency?
What do you mean by reflection of sound? State one condition for the reflection of a sound wave. Name a device in which reflection of sound wave is used.
Write the approximate value of the speed of sound in water.
In what respect does waveforms of noise and a musical note differ. Draw diagrams to illustrate your answer.
Explain reflection at the boundary of a rarer medium.
