Low-frequency sound generator
AssigneeMats Olsson Konsult AB
InventorsMats A. Olsson, Roland Sandstrom
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Abstract
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.
Claims15
Low-frequency sound generator for generating sound less than 50 cps comprising an open resonator tube (10), a feeder system (13) connected at one end of said resonator tube and having a diameter smaller than that of said resonator tube and including a movable valve slide member (15) operable to vary the pressure of gas pulses supplied to the resonator tube, said resonator tube having a length equal to one-fourth of the frequency generated, said gas pulses being operable to develop standing sound waves in said resonator tube, said sound waves providing a varying gas pressure in said resonator tube, characterized by means (20) in said resonator tube connected to said movable valve slide member operable in response to changes in said pressure to provide positive feedback of the sound pressure in the resonator tube to the feeder system only at a resonant frequency of the resonator tube.
Dependencies are inferred from the claim text.