Effect of Acoustic Impedance and Viscosity of Gases on the Electrical Constants of Quartz



The equivalent resistance, capacitance and the Q factor of a quartz crystal vibrating at its fundamental frequency in several gaseous media were measured and the results compared with the acoustic impedance (P C) of the media. While the resistance varies linearly with P C the reciprocal capacitance does not. The Q factor seems to vary linearly with viscosity within the small range of viscosities.