Q1 of 8 Page 23

Using plastic pipes make a device which resembles a resonance column and exhibit it in the science club.

Resonance is a stage of forced oscillation when the vibrating body drives another body to oscillate with greater amplitude at specific frequency.

As you excite a tuning fork of frequency 512Hz and raise the inner column simultaneously you will observe increase in the loudness of the sound because when frequency of the air column and fork are equal then there will be maximum sound produced as they will be in resonance.



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2

What do you mean by acoustics of buildings? Suggest four steps that can be taken, while constructing buildings, to avoid problems that may occur due to multiple reflection of sound.

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A sound signal from a ship floating on water, hits a rock at the bottom of the sea and comes back to the ship after 4 s. Calculate the distance of the rock from the surface of water. The speed of sound in water is estimated to be 1500 m/s.

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Visit a nearby cinema theatre, find out what has been done there in connection with acoustics of buildings and prepare a short note.

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Study the role of the shape of a Veena in utilizing forced vibration and prepare a short note.