Question

What is a soundboard? Explain the working of a soundboard with the help of a labelled diagram.

Answer 1

In big halls or auditoriums, the sound is absorbed by the walls, ceilings, and seats, that's why a curved board is placed behind the speaker such that the speaker is at the focus point of the curved surface. The curved surface or the board used for this purpose is known as a soundboard.

Soundboard makes the sound of the speaker louder and clear because after multiple reflections of the sound at the curved surface all the reflected rays distribute uniformly to the audience and sound is heard more clearly. As you can see in the figure, the source is always placed at the focus of the curved surface, and curved board is placed behind the source of the sound so that the sound gets reflected from the soundboard and distributed uniformly to the front.