Four Forks - Mounted

For demonstrating the formation of basic major chords. Consists of four forks mounted on a wooden box and having frequency of:

C (256)

E (320)

G (384)

C (512)

Pair of Forks

A pair of steel or aluminium tuning forks for demonstrating the beat frequencies mounted on individual boxes. One fork is provided with an adjustable mass by means of which frequency may be shifted from the nominal 426.6. When both forks are sounded a clearly audible 'beat' is produced, its rate depending upon the difference in frequency between the forks.