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waves with frequency greater than 20 kHz...

________ waves with frequency greater than 20 kHz.

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SURA PUBLICATION-ACOUSTICS-ADDITIONAL QUESTIONS & ANSWERS (FILL IN THE BLANKS (COVERS THE WHOLE UNITS))
  1. waves are sound waves with frequency below 20 Hz.

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  2. Waves produced during an earthquake and ocean waves are called waves.

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  3. waves with frequency greater than 20 kHz.

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  4. Human ear cannot detect waves.

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  5. Bats can detect waves.

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  6. Sound waves requires a for propagation.

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  7. Light waves are .

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  8. The wavelength of sound waves ranges from .

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  9. The wavelength of light waves ranges from .

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  10. Two types of velocity are velocity and velocity.

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  11. SI unit of velocity is .

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  12. The velocity with which the particles of a medium vibrate in order to ...

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  13. The velocity with which the wave travels through a medium is called .

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  14. The distance travelled by a sound wave in is called the velocity of t...

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  15. The speed of sound is directly proportional to the square root of the ...

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  16. Velocity of sound in solids decreases as the increases.

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  17. When sound is reflected from a convex surface, the· reflected waves ar...

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  18. When sound is reflected from a concave surface, the reflected waves ar...

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  19. Many halls are designed with reflecting surfaces to required to focus...

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  20. In surfaces, sound from one focus will always be reflected to the oth...

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