Effect of Atmospheric Pressure on the Frequency of a Tuning-fork

Abstract

DUE to the necessity of obtaining accurate values of high frequencies in radio communication, the establishment of a frequency standard of high order of accuracy has already been undertaken in various countries. The usual method is a single frequency standard system. It naturally requires an ideal vibrator of extremely high order in constancy. A valve-maintained tuning-fork, according to Eccles, has been widely employed.