This aluminum tuning fork vibrates at 128 Hz frequency. It is stamped with the musical scale note sounded by the fork and the frequency in Hz at the base of the tine. This fork has been milled from non-rusting, non-magnetic aluminum bar stock.
A tuning fork serves as a useful illustration of how a vibrating object can produce sound. When the tuning fork is hit with a rubber hammer, the tines begin to vibrate. The back and forth vibration of the tines produce disturbances of surrounding air molecules. As the tines continue to vibrate, an alternating pattern of high and low pressure regions are created. These regions are transported through the surrounding air, carrying the sound signal from one location to another.
