What type of wave is produced when the particles of the medium are vibrating to and fro in the same direction of wave propagation?

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Elnaz Nemati Popular answer

echoes produced in an empty auditorium

Hasan Rohani

Why do echoes produced in an empty auditorium usually decrease when it is full of audience?

Elnaz Nemati

Hassan Fakhrtaha

this type of waves is longitudinal waves are compressional waves and Wave longitudinal wave environment in which to move in the direction of wave propagation or counterclockwise direction. Sound and seismic waves are examples of longitudinal waves.