Question

Take a metal plate (or a pan ). Hang it at a convenient place in such a way that it does not touch any wall. Now strike it with a stick (Fig.13.2). Do you hear a sound? Touch the plate or pan gently with your finger. Do you feel the vibrations? Again strike the plate with the stick and hold it tightly with your hands immediately after striking. Do you still hear the sound? Touch the plate after it stops producing sound. Can you feel the vibrations now?

Answer 1

Answer to every question as red in the question is "Yes"$. After striking the pen with a stick, its surface vibrates resulting its surrounding air to also vibrate that causes sound. In initial stage of vibration the frequency of sound produced which fall in are dilde range thus sound could be heard but after sometime sound will be in are dible as the frequency gas fallen out of the acedible range but still the vibration could felt.