drum/tabla - the stretched membrane of the instrument vibrates to create different sounds on the basis of how hard it is struck. flute- when blown air through the holes, the air present in the air columns vibrates to make sound. guitar/ sitar- the string attached to the instrument vibrates  when struck to create various sounds.  Vibration is the cause to the working of any musical instrument ………
 i hope it helps...........
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Snare drum:-
The two membranes of the snare drum are acoustically coupled to each other, particularly at the low frequencies. This coupling via the enclosed air acts to double the modes. The lower frequency member of the mode pair involves both heads moving in the same direction and for the higher mode they move oppositely.
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