Question

writer when a sound become loud sound

Answer 1

A vibration causes the surrounding medium(usually air), to also vibrate in the same way, causing a pressure wave which your ears pick up assound. Sound / noise etc. are vibrations. You hear them because thesound waves/ tiny vibrations are hitting the inside of your ear. Vibration doesn't make sound, it is sound.

Answer 2

extra energy causes the string to vibrate more, which helps it move more air particles for a longer time. A string plucked with force has greater amplitude, and greater amplitude makes the sound louder when it reaches your ear. Volume depends on amplitude. Greater amplitude produces louder sounds.

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