Patent classifications
G
PHYSICS
Load children
G10
MUSICAL INSTRUMENTS; ACOUSTICS
Load children
G10K
SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
Load children
9/00
Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
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G10K9/02
driven by gas; e.g. suction operated
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G10K9/04
by compressed gases, e.g. compressed air
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G10K9/04

Revolving valve for feeding air pulses to a resonance tube for generating low-frequency sound and a method for feeding these pulses in an optimal way
12469478 · 2025-11-11 · ·

A method for feeding pressurized air pulses to a quarter wave resonance tube, for generating a standing low-frequency sound wave in said quarter wave resonance tube. The method entails that the pressurized air pulses supply maximum input power to said standing low-frequency sound wave by feeding said pressurized air pulses only during the time intervals of the oscillation cycle when the air pressure in said rear end of the quarter wave resonance tube, is positive. Also disclosed is a revolving valve, for feeding pressurized air pulses to a quarter wave resonance tube, for generating a standing low-frequency sound wave in said quarter wave resonance tube.

Revolving valve for feeding air pulses to a resonance tube for generating low-frequency sound and a method for feeding these pulses in an optimal way
12469478 · 2025-11-11 · ·

A method for feeding pressurized air pulses to a quarter wave resonance tube, for generating a standing low-frequency sound wave in said quarter wave resonance tube. The method entails that the pressurized air pulses supply maximum input power to said standing low-frequency sound wave by feeding said pressurized air pulses only during the time intervals of the oscillation cycle when the air pressure in said rear end of the quarter wave resonance tube, is positive. Also disclosed is a revolving valve, for feeding pressurized air pulses to a quarter wave resonance tube, for generating a standing low-frequency sound wave in said quarter wave resonance tube.