LOW-FREQUENCY TONE GENERATOR

摘要

A low-frequency sound generator for generating intense sound, which generator includes an open resonator tube. Pressurized gas is supplied to the resonator tube as pulses through a feeder system which includes a valve slide member which controls the pressure of the supplied gas. The gas pulses develop standing sound waves in the resonator tube which provides a varying gas pressure. Means in the resonator tube is operable in response to changes in the gas pressure to provide positive feedback of the sound pressure in the resonator tube to the feeder system at a resonant frequency of the generator.