longitudinal wave

waves in which the displacement of the medium is in the same direction as, or the opposite direction to, the direction of propagation of the wave

en-GB/ˌlɒnd͡ʒɪˈtjuːdɪnl ˈweɪv/
en-US/ˌlɑnd͡ʒəˈtudənəl ˈweɪv/

زمرے:

progressive wave