Tuning Forks C-Major, on Resonance Boxes

Tuning Forks C-Major, on Resonance Boxes Set of four tuning forks for demonstrating C-major chord. Supplied on a sound box made of clear grained pine for especially long sustain from which the tuning forks can be removed. Includes a soft striking hammer (U10122). Natural frequency, Internal length: c’ = 256 Hz 300 mm e’ = 322 Hz 240 mm g’ = 384 Hz 190 mm c’’ = 512 Hz 140 mm