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Give two practical applications of refle...

Give two practical applications of reflection of sound waves.

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The two practical applications of reflection of sound are as follows:
(1) Megaphone are designed to send sound in particular direction without spreading it in all directions.
(2)Stehoscope is used for listening the sounds produced within the human body.
3) Ceilings of the concert halls are curved so that the sound after reflection reaches all corners of the hall.
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KUMAR PRAKASHAN-SOUND-QUESTIONS AND ANSWERS (Answer the following questions is short:)
  1. The frequency of a source of sound is 100 Hz. How many times does it v...

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  2. What is loudness of sound? On what factors does it depend?

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  3. A boy heard a sound of frequency 100 Hz at a distance of 500 m from th...

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  4. Flash and thunder are produced simultaneously. But thunder is heard a ...

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  5. Two children are at opposite ends of an aluminium rod. One strikes the...

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  6. Does the sound follow the same laws of reflection as light does? Expla...

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  7. When a sound is reflected from a distant object, an echo is produced. ...

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  8. Give two practical applications of reflection of sound waves.

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  9. A man fires a rifle in front of a cliff and hears the echo after 3 sec...

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  10. Why is echo not heard in a small room?

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  11. A person has a hearing range from 20 Hz to 20 kHz. What are the typica...

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  12. Explain how bats use ultrasound tt catch a prey.

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  13. How is ultrasound used for cleaning?

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  14. A sound wave travels at a speed of 339 ms^(-1) . If its wavelength is ...

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  15. A sonar device on a submarine sends out a signal and receives an echo ...

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  16. A ship which is stationary is at a distance of 2800 m from the seabed...

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  17. Cracks in bones can be detected using ………

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  18. Draw a neat and cleaned diagram of human ear and label the auditory pa...

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  19. Draw graphical representation of the wave shaper for (1) low-pitched s...

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  20. When the wire of a guitar is plucked, . What types of waves are produc...

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