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Name the unit used to measure the loundn...

Name the unit used to measure the loundness of sound. Also write its symbol.

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LAKHMIR SINGH & MANJIT KAUR-SOUND-Very Short Answer Type Questions
  1. Name three devices which work on the reflection of sound.

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  2. What is the other name of a lound-halider?

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  3. Name the unit used to measure the loundness of sound. Also write its s...

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  4. Name the characteristic which helps us distinguish between a man's voi...

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  5. How does the pitch of a sound depend on frequency?

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  6. Name the characteristic of sound which depends on (a) amplitude (b) fr...

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  7. Name the characteristic of sound which can distinguish between the 'no...

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  8. Name that part of ear which vibrates when outside sound falls on it.

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  9. From outer to inner side, the sequence of three bones present in the m...

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  10. Name the tube which connects the middle ear to throat.

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  11. Name the nerve which carries electrical impulses from the cochlea of e...

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  12. What is the name of passage in outer ear which carries sound waves to ...

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  13. Why should we not put a pin or pencil in our ears?

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  14. What type of scans are used these days to monitor the growth of develo...

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  15. What is the name of the device which is used to find the depth of sea ...

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  16. Name the principle on which a soundboard works.

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  17. Name the device used by doctors to liste to our heartbeats.

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  18. What is the shape of a soundboard kept behind the speaker on the stag...

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  19. What name is given to sound waves of frequencies higher than 20 kHz?

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  20. What type of sound waves are produced by a vibrating simple pendulum?

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