Electrostatic mutual inductor

A transformer, electrostatic technology, applied in electret electrostatic transducers, electrostatic transducer speakers, electrostatic transducer microphones, etc., can solve problems such as inability to hear speech or signals

Inactive Publication Date: 2002-05-15
AKG ACOUSTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Interference caused by hum or radio reception can be heard due to high frequency spurs and can be so pronounced that speech or signals cannot be heard clearly

Method used

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  • Electrostatic mutual inductor
  • Electrostatic mutual inductor
  • Electrostatic mutual inductor

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Embodiment Construction

[0014] figure 1 and 2 Denotes an electrode cartridge and in particular the HF entry path according to the prior art. The electronic components 2 of the box are arranged on a printed circuit board 4 . The associated electrical connector 5 leaves the housing through a corresponding hole, usually several rear acoustic holes 1 adjoining this hole. There is a front sound hole 3 on the box end face. The cartridge case 7 is mostly composed of metal or conductive material.

[0015] In both figures, the entry of HF is indicated by arrows, which, as mentioned above, also enter via the line 5 via a wired connection. Despite these multiple influences the HF entering through the rear acoustic port 1 is still the main problem.

[0016] The influence of the HF that enters through the rear acoustic hole is now greatly reduced by the structural modeling of the printed circuit board 4 of the shape shown in FIG. This is far farther away than before, and since the HF entering close to the h...

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Abstract

An electrostatic transducer of small size, particularly having a diameter of 2-30 mm, is provided with a metal housing or electrically conductive housing having at least one front sound entry opening and a print arranged on a rear side of the housing, wherein the print substantially closes off the housing and has at least one rear sound entry opening, and wherein an electronic system is arranged on the inner side of the print. The at least one rear sound entry opening is formed at the periphery of the print.

Description

technical field [0001] The invention relates to an electrostatic transformer of small size, in particular with a diameter of 2 to 30 mm, having a metallic or conductive housing with at least one front acoustic hole and a substantially closed housing at the back of the housing and at least A printed circuit board with a rear sound hole, and electronic components are arranged on the inner side of the printed circuit board. Background technique [0002] This type of electrostatic transformer is used in mobile transmitting equipment (cordless phones, mobile phones, intercoms for cars, sensors in car radios for example for adjusting the volume according to speed) and is available either with a built-in impedance transformer or It is an electrostatic transformer with a built-in impedance transformer with a post-amplifier. [0003] An electret cell with the structure described briefly above is known for the above purpose. Since such a box is used together with a transmitter, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R19/01H04R19/04
CPCH04R19/04
Inventor 理查德·普里比尔
Owner AKG ACOUSTICS
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