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SURA PUBLICATION-ACOUSTICS-ADDITIONAL QUESTIONS & ANSWERS (FILL IN THE BLANKS (COVERS THE WHOLE UNITS))
- Dolphins and bats hear .
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- To hear a distinct echo, each time interval between the original sound...
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- Speed of sound depends upon of the medium.
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- Loud sound can travel a larger distance due to .
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- The frequency of sound wave whose time period is 0.02 second is .
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- Sound is a form of and produced by .
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- High and low pressure regions of longitudinal wave is called and .
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- Energy of the sound wave is proportional to .
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- Distance between two consecutive compressions is .
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- Number of vibrations produced in one second is of the wave.
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- SI unit of frequency is .
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- Velocity of sound is in solids.
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- Sound waves are .
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- For louder sound will be greater.
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- To differentiate two sounds is called .
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- The speed of sound is inversely proportional to .
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- When humidity increases, the speed of sound .
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- Reflection of sound is called .
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- The pitch of sound depends on .
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- surfaces are used to focus the sound at particular point.
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