Curved surfaces which are used in the big hall to direct the sound waves towards the people sitting in a hall are known as:

Megaphone

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Hydrophone

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Bulb horn

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None of the above

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Solution

The correct option is D None of the above
Soundboards are curved surfaces (concave) that are used in a big hall to direct the sound waves towards the people sitting in a hall. The source of sound is placed at the focus of the soundboard.

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Similar questions

Answer the following.

(1) Suppose you and your friend are on the moon. Will you be able to hear any sound produced by your friend? Give reasons.

(2) Why can we not hear echo produced in our classroom?

(3) Why are ceilings of concert halls, cinema halls curved?

(4) Which type of waves are sound waves? State their characteristics.

(5) Explain auditory aspects of human ear.

What name is given to the persistence of sound in a big hall or auditorium ?

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