SU472699A1 - Acoustic Emitter - Google Patents

Description

The invention relates to a technique for generating acoustic oscillations and may be used in devices using -powerful and frequency-stable acoustic radiation.

As known, acoustic emitters containing a housing with a power supply and receiving sapla, a control membrane, a transforming element and a radiating Membrane. However, these emitters are not adjustable in frequency and do not have a high stablity.

The purpose of this is to simplify the restructuring process and increase the stability of a given radiation frequency. This is achieved due to the fact that the transforming element is made in the form of a string that is not laid in the ground, between the power supply and the receiving nozzles and fixed at one end on the (body and the other not the diaphragm).

The drawing schematically shows the emitter.

The emitter includes a housing 1, a control membrane 2, a powering nozzle 3, a receiving nozzle 4, a string 5, and an emitting membrane 6.

The internal profile of the radiator is functionally divided into three cameras: control camera A, conversion chamber B, and radiation chamber C.

Acoustic emitter works as follows.

When the supply pressure is applied to the nozzle 3 from "it to the transformation chamber B, the jet flowing to the string 5 expires," the shear gave some preliminary tension.

The string begins to oscillate in the perpendicular perpendicular to the axis of the feed nozzle with a frequency determined by the preliminary tension of the string. The string oscillations cause a periodic oscillation of the velocity head of the jet acting on the reciprocating nozzle 4 with a frequency determined by the frequency of the string oscillations and, accordingly, the static pressure oscillation in the radiation chamber C. These oscillations are shocked by the radiating membrane 6 and are transmitted to the surrounding space. To adjust the frequency, control pressure is applied through a hole in the wall of the camera. In this case, the tension of the string changes and the radiation frequency is rearranged. The waste liquid is drained through a hole in the wall of the transformation chamber B. This opening also serves to compensate for the static pressure acting on the membrane .6 from the surrounding space.

Subject invention

An acoustic emitter, comprising a housing with supply and receiving nozzles, a collector membrane, a spin-forming element and

radiating a membrane, characterized in that: the purpose of simplifying the tuning and increasing the stability by setting the frequency of the radiation, the transforming element

in the form of a string located in the gap between the supply and the receiving nozzles and fixed at one end on the corus and the other on the control membrane.

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