Drums consist of at least one membrane, called a drumhead or drum skin, that is stretched over a shell and struck, either directly with the player's hands, or with a percussion mallet, to produce sound.
Given below are some example of wave motion. State in case, if the wave motion is transverse, longitudinal or a combination of both? Wave produced in a cylinder consisting a liquid by moving its piston back and forth.
Answer
Longitudinal, because the molecules of the liquid vibrate to and fro about their mean positions along the direction propagation of the wave.
Sound waves needs material medium to propagate therefore, they are called mechanical waves. Sound waves propagate through a medium because of the interaction of the particles present in that medium.