The strings are plucked by leather or quill points connected with the keys
The vibration caused by the marchers caused the bridge to collapse.
the vibration on a recorder is caused by air you blow in the mouth piece.
by the strings
Vibration was never started by anything. Vibration is just caused by shaking of objects, and it wasn't "started".
vibration
the vibration of flute is caused by the mouth of the human blowing into it your a will head
oligospermia
Sensations caused in the ear by vibration of the air.
sound energy
sound energy is caused by vibration.
Your voice is a sound, hence it is a vibration in the air, which is caused by a vibration in your vocal chords. This is true whether you are singing or speaking. It's a vibration, either way.