longitudinal waves travel through pattern of compressions and rarefactions
trajectory_swept_space is localized_spatial_thing. sounds is longitudinal_waves. light_propagation_through_liquid is not wave_propagation. image_compression is compression. sounds is not longitudinal_waves. oscillating_trajectory is trajectory. shock_wave is not wave_propagation. scattering is movement_process. light_propagation_through_liquid is wave_propagation. shock_wave is wave_propagation.