SU621001A1 - Acoustical radiator - Google Patents

Description

(54) DEVICE FOR RADIATION OF SOUND

I

The invention relates to the field of instrumentation and can be used in acoustics to emit sound waves.

A device for emitting a sound b is known, consisting of a disk with openings located around its circumference, which rotates uniformly before the nozzle section, from which a jet of air escapes.

Of the known devices, the closest in technical essence to the present invention is a device for emitting sound, comprising a hollow gas-resonance system with: establishing 1M 1B in it, a generator of sound vibrations 2.

A disadvantage of the known devices is the low efficiency of the device.

The purpose of the invention is to increase the efficiency of the device 20.

For this, the proposed device is equipped with positive ion ions connected in series by a gas generator, an ion trap and a dielectric 28 KIM gas duct, as well as a ring electrode and a power source} | which is connected to the zhnaty pole of which the Zon trap is connected, and to the positive pole the ring electrode located at 30

in the output section of the resonant system, and the gas duct is connected to the internal volume of a gas-resonance system, the walls of which are made of a dielectric.

The drawing schematically shows the proposed device.

Gas resonance system 1, made nz dielectric material, for example concrete, in the form of a quarter-wave pipe, at its plugged end has a sound generator 2, and the open end is equipped with a ZUI ring electrode made of dielectric material, such as concrete, ion trap 5 and A positive ion gas generator b is associated with a reservoir of compressed gas (not shown in the drawing).

The device works as follows.

Claims (2)

From the reservoir of compressed gas, the gas enters the gas generator of 6 positive ions, where it is split into positive and negative ions. Negative ones, getting into the ion trap 5, are excluded from the gas mixture, and the positive ions through the gas guide 4 together with the gas are gas-resonant system 1. He62 charged gas particles escape into the surrounding space through the ring electrode 3. The same positive ions of the gas are locked the ring electrode 3 in the gas-resonance system 1.; The concentration of positive ions does not increase until the number of recombined ions is less than the number of incoming ions, then a dynamic equilibrium occurs in the concentration of ions. The concentration is controlled by the gas flow rate, the ionization rate, and the efficiency of the ion trap. After reaching the required values of the concentration of ions in the gas-resonance system 1, a generator 2 of sound oscillations at the resonant frequency of the gas-resonance system is turned on. Since the ionized gas has a sound velocity of HP sound less than the speed of sound in the environment, there is no need to make the gas-resonance system large to emit low frequencies. A length of pipe of 1 m effectively radiates sound waves in the 40–5 OG frequency range. The use of the proposed device makes it possible to significantly improve the efficiency of sound emitters, especially at low frequencies. An apparatus for emitting sound containing a hollow gas-resonance system with a sound oscillator installed in it, characterized in that, in order to increase the efficiency of the device, it is equipped with positively connected gas generator of positive ions, an ionic trap and a dielectric gazovod, as well as a ring electrode and a power source, to the negative pole of which the ion trap is connected, and to the positive pole — an annular electrode, located in the output section of the resonant system, the gas duct is connected to the internal volume of the gas-resonance system, the steaks of which are made of dielectric. Sources of information taken into consideration in the examination: 1.Wood A.V. Sound Guide, London, Foreign Literature, 1955, 224-227. 2. The patent of France 1039511, q.Q 11 K 7/02, 1951.