ABSTRACT
In the theory of Vibration of plates, it is assumed that the plate consists of a perfectly elastic, homogenous isotropic material. It is also assumed that the plate has a uniform thickness considered small in comparison with other dimensions and that the deflection is small in comparison with the thickness of the plates. These are the conditions which have been applied in the theory of diaphragm analysis and design and which are applicable in determining the frequency response of diaphragms whose magnitudes are extremely important in dynamic measurements. If possible, a flush diaphragm type of instrument mounted at the pressure source is the best setup possible for picking up pressure variations rapidly and faithfully. The dynamic Performance of the instrument is severely hampered by connecting tubing and other Uttings to the pressure source. The natural frequency of diaphragms is severely degraded when the diaphragm is remotely connected to a pressure source by means of tubing, fittings, and "O" rings.
