how accurate is a tuning fork
About our Tuning Forks Our tuning forks are made in the USA from a special Aluminum Alloy that is heat treated giving them a very pure tone. The single fundamental frequency will remain constant for many years and the non-tarnishing material will not rust or corrode. They tune each tuning fork by hand to an accuracy of .25% or better. Ohm Therapeutics Tuning Forks are fully guaranteed to stay in tune. We work with the premier tuning fork manufacturer in the US. Ohm Tuning Forks are made with a space & medical grade aluminum alloy and are precision tuned to within 0.5% of their indicated frequency. We have chosen not to color our forks to reduce environmental impact.