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The word 'quivering' is a gerund (a verbal noun), the present participle of the verb to quiver that functions as a noun.The present participle of the verb also functions as an adjective.
Sound waves are produced due to the vibrations of an object .Sound waves are produced by vibration. Everything on this earth causes some sort of vibration. When something vibrates it produces a sound.
When something resonates it vibrates and usually produces a strong deep sound.
The Quivering happened in 1999.
The word quivering (present participle of to quiver) *can be* an adjective (quivering assistants, quivering pets). It can also be a verb form or a noun (gerund).
The Quivering was created in 1999-05.
her lip was QUIVERING as she saw him do that
*After the rain storm, I saw a kitten quivering from the cold. *The murderer was quivering in fear before he pulled the trigger that killed my mother.
Vibrating produces sound.
A harpsichord produces a sound by plucking a string when a key is pressed down.
Stillness, quiet, or steady. Those words are the opposite of quivering.
A tighter string produces a higher pitched sound and a looser string produces a lower pitched sound