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There are several instances of some sort of ancient instrument, consisting of metallic plates or rods, played by means of a hammer. Many have considered these to have been the original type of the modern instruments of percussion, where metal plates are vibrated by means of hammers or mallets.

Ancient Percussion

There are several instances of some sort of ancient instrument, consisting of metallic plates or rods,…

"Grasp one end of a straight spring made of hickory or steel in one end of a vise, as shown. Pluck the free end of the spring so as to produce a vibratory motion. If the spring is long enough, the vibrations may be seen. Lower the spring in the vise to shorten the vibrating part of the rod, and pluck it again. The vibrations are reduced in amplitude, and increased in rapidity. Continued shortening of the spring will render the vibrations invisible and audible; the are lost to the eye, but revealed to the ear." -Avery 1895

Sound due to Vibrations

"Grasp one end of a straight spring made of hickory or steel in one end of a vise, as shown. Pluck the…

An illustration of waves demonstrating different nodes.

Waves

An illustration of waves demonstrating different nodes.