Question

Why is loudness of sound heard by a plucked wire increased when mounted on a sound

Answer 1

Hello,

Here's the answer :-

I hope you meant -> 'mounted on a sound box'

So,

When a string is plucked normally, its sound has to travel a long distance to reflect and come or directly come.

But when a sound box is placed with it, the sound is kind of 'trapped' in the box and suffers multiple reflections, which makes it act like an amplifier of sound.

Hope it helped :-)

Answer 2

Answer:

A wire mounted on a soundboard is plucked, the surface area of vibrating air increases and sends forth greater amount of energy, So the amplitude of vibration is large and louder is the sound.