When one drops a pebble in a body of water, one can observe multiple waves emanating from the point the pebble came in contact with water. Be it because the water "jumps" up and comes back down, creating more waves or because the water does "up and down" motion, there are definitely many waves.

But when one snaps ones fingers, thus creating a wave in the air, there is only one clear sound, no multiple, diminishing snaps (unless there is echoes, but this is not a concern), unlike one would expect just by observing waves in water. Why is this?