In this cool sound resonance experiment, learn about frequency and pitch, and use a tuning fork to calculate sound velocity in air.

When we talk about the speed of sound, we usually mean how fast it moves through air. But it can travel much faster through other media, and now scientists at the University of Cambridge have identified the absolute top speed of sound.

How Sound Travels | NASA Online : The speed at which sound travels from one place to another depends upon the medium and how closely packed the molecules are in the matter.

Officials in the South Korean capital Seoul hope the near-supersonic mode of transport will be able to travel more than 620mph - drastically reducing journey times in the country.

A Research Guide to assist students in their Nobel Laureate Project.

Breaking sound barrier

Rolling around at the speed of sound