A Study of the Effects of Environmental Noise on the Performance of Fluid Amplifiers

摘要

The effects of environmental noise on the static performance of two bistable fluid amplifiers were studied. Plots of differential control pressure versus differential output pressure were made by varying input pressure to one control. In addition to sound frequency and pressure level, variables considered included amplifier configuration, orientation, and supply pressure. Tests were run at frequencies of 100, 200, 500, 1000, and 2000 cps and sound pressure levels ranging from 151 to 157 db. The effects noted varied widely and included decreased hysteresis, instability, and complete loss of bistable characteristics. The phenomena of jet spreading, radiation pressure, and acoustic streaming were related to these effects. (Author)