Anti-eavesdropping device

An anti-eavesdropping and ultrasonic technology, applied in the direction of anti-eavesdropping circuits, etc., can solve problems such as being unable to effectively prevent eavesdropping, and achieve the effect of reducing the emission intensity and improving the interference effect

Inactive Publication Date: 2015-05-06
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the problem that the prior art cannot effectively prevent eavesdropping, and proposes an anti-eavesdropping device based on audio frequency fixed-point propagation technology

Method used

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Embodiment Construction

[0027] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0028] The anti-eavesdropping device provided by the present invention includes a signal input module, a signal processing module, a signal storage module, a human-computer interaction interface module, two or more power amplification drive circuit modules, and two or more matching circuits module and two or more ultrasonic transducer array modules; the signal input module is respectively connected with the signal processing module and the signal storage module, the human-computer interaction interface module is connected with the signal processing module, and each power amplification drive circuit module is respectively connected with the signal The processing module is connected, the number of the power amplification driving circuit module, the matching circuit module and the ultrasonic transducer array module are the same, and each power amplification ...

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Abstract

The invention discloses an anti-eavesdropping device which comprises a signal input module, a signal processing module, a signal storage module, a human-computer interaction interface module, two or more than two power amplifying driving circuit modules, two or more than two matching circuit modules and two or more than two ultrasonic transducer array modules. An audio frequency fixed point propagation technology is innovatively used to transmit a record interference signal, a conversion signal based on an original voice signal is adopted as an interference signal, the interference is only conducted on the target area requiring anti-eavesdropping recording interference, other areas are not affected, transmission strength of the interference signals is reduced, and a good interference effect is obtained. Effective interference on the anti-eavesdropping recording of a recording device in different application scenes is achieved, and the device has important practical significance and wide use value.

Description

technical field [0001] The invention belongs to the technical field of acoustics and signal processing, and in particular relates to the design of an anti-eavesdropping device. Background technique [0002] In recent years, with the rapid development of electronic technology, various digital products with recording functions emerge in an endless stream. In some secret-related places, criminals use various wiretapping devices to wiretap, and these wiretapping devices are extremely concealed and difficult to guard against. [0003] It is precisely because of the emergence and wide application of these digital products with recording functions and special eavesdropping equipment that enterprises, government departments and even individuals often encounter the problem of being maliciously eavesdropped on recordings, which seriously violates people's personal privacy and corporate eavesdropping. , Secrets of government departments. [0004] The common anti-eavesdropping method ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04M1/68
Inventor 杜鹏姜楠
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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