human
What are the different types of acoustic waves?
assistant
The different types of acoustic waves include compressional, shear, longitudinal, and surface waves. Compressional waves are longitudinal waves that travel through a medium in the direction of their propagation. Shear waves are transverse waves that move perpendicular to the direction of propagation. Longitudinal waves have a particle displacement that is parallel to the direction of propagation. Finally, surface waves involve vibrations that occur at the interface between two media with different acoustic impedances.