Question

The loudness of sound heard by a plucked wire is increased when mounted on a soundboard. Why? Give reasons.

Answer 1

1. A wire mounted on a soundboard is plucked, the surface area of vibrating air increases and sends
   the forth greater amount of energy,
2. So the amplitude of vibration is large and louder is the sound.
3. In the case of the guitar string mounted to the soundbox, the fact that the surface area of the soundbox is greater than the surface area of the string means that more surrounding air particles will be forced into vibration.
4. This causes an increase in the amplitude and thus loudness of the sound.
5. When the wire is mounted on a soundboard, the surface area of vibrating air increases and it sends a greater amount of energy forward.
6. The amplitude of vibration is large and louder is the sound.

Hence, the loudness of the sound heard by a plucked wire increases when it is mounted on a soundboard.