Influence of Air Pressure on the Resonance Properties of a T-Shaped Quartz Tuning Fork Coupled with Resonator Tubes

A theoretical analysis and experimental investigation of the influence gas pressure on resonance properties, namely, quality factor frequency, a T-shaped quartz tuning fork (QTF) is reported here. Two configurations are considered: bare QTF, QTF coupled with pair resonator tubes (spectrophone). In both configurations, effect air frequency due to additional inertia prong motion damping factor, were analysed. By comparing spectrophone results, acoustic coupling between was theoretically modelled then validated. The results show that strongly influenced by pressure, leading shift decrease in up 24%.