IPA: /ˈvaɪbrəˌtɔːri/
KK: /ˈvaɪbrəˌtɔri/
Relating to or causing vibrations or oscillations.
The vibratory motion of the speaker produced clear sound.
Vibratory → It is formed from "vibrare" (meaning to shake or quiver) and the suffix "-ory" (meaning relating to or characterized by). The word "vibratory" refers to something that is characterized by shaking or quivering motion.
Think of something that is 'shaking' ('vibrare') — that's why 'vibratory' means relating to shaking or quivering.