Sound Worksheet-9

Sound Worksheet-9

 

  1. ______ is the to and fro motion of an object.

 

  1. ____ is produced by vibrating body.

 

  1. The vocal cords in man are about ____mm long.

 

  1. The unit of frequency is ____.

 

  1. The maximum displacement of the sound vibration is the measure of ____ of vibration.

 

  1.  _____ Oscillations per second.

 

  1. ____ is the duration of time for one oscillation to occur.

 

  1. Objects that produce sound are called _____ of sound.

 

  1. The organ involved in the production of sound in human is _____.

 

  1. ____ are the thin membranes stretched across the voice box

 

  1. Sound travels in the form of a ____.

 

  1. Shrillness or pitch is determined by_____ of the vibrating object.

 

  1. Pitch is directly proportional to _____.

 

  1. Loudness is directly proportional to _____.

 

  1. Higher the frequency of the vibrating body, the higher is the ____.

 

  1. The part of the outer ear which is visible is called____.

 

  1. _____part of ear collects sound waves and directs them to ear tube.

 

  1. Middle ear is a cavity with ____ ear bones.

 

  1. Sound waves travel fastest in _____ and slowest in _____.

 

  1. Human ear cannot hear sound waves of frequency below____.

 

Answer:

  1. vibration/oscillatory motion

  2. sound

  3. 20

  4. Hertz

  5. amplitude

  6. one

  7. time period

  8. sources

  9. larynx/voice box

  10. vocal cords

  11. wave

  12. frequency

  13. frequency

  14. amplitude

  15. shrillness

  16. pinna

  17. pinna/external ear

  18. three

  19. solid, gases

  20. 20 hertz