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
CN104601784AInactive Publication Date: 2015-05-06UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
UNIV OF ELECTRONICS SCI & TECH OF CHINA
Publication Date
2015-05-06
Estimated Expiration
Not applicable · inactive patent

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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.
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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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