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A research team at City University of Hong Kong (CityU) has discovered a new type of sound wave: the airborne sound wave vibrates transversely and carries both rotation and orbital angular momentum ...

Hey all! So all my life I have heard that sound is a type of wave. This seemed to make sense to me. Recently I have come across some information that has me second guessing such tradition knowledge.

From a blackbird’s song to the rumble of a passing train, sounds are produced by vibrations moving through the air, ground, or water in invisible waves. When those soundwaves enter your ear, they make ...