The tree above generated sound waves when it fell to the ground, so it made sound according to the scientific definition. In longitudinal waves, particles of the medium vibrate back and forth parallel...The tree above generated sound waves when it fell to the ground, so it made sound according to the scientific definition. In longitudinal waves, particles of the medium vibrate back and forth parallel to the direction that the waves travel. Q: If there were no air particles to carry the vibrations away from the guitar string, how would sound reach the ear? That’s because the sound couldn’t travel away from the clock without air particles to pass the sound energy along.
