Anti-eavesdropping ultrasonic band interference device

Abstract

The utility model discloses an anti-eavesdropping ultrasonic wave band interference device and belongs to the anti-eavesdropping field. Comprising a switch module, a microphone array connected with the switch module, a voice processing module connected with the microphone array, a processor connected with the output end of the voice processing module, a pulse sequence module and a noise module which are connected with the output end of the processor, and an adder connected with the output end of the pulse sequence module, the modulator is connected with the output end of the summator, the ultrasonic transducer array is connected with the output end of the modulator, and the ultrasonic array generator is connected with the input end of the modulator. The anti-eavesdropping ultrasonic wave band interference device adopting the above structure is better in interference signal directivity, more concentrated in energy, high in power density, wide in coverage range and better in anti-eavesdropping effect, and has different modes for selection.

Description

Technical Field

[0001] The utility model relates to the technical field of anti - eavesdropping, in particular to an ultrasonic band interference device for anti - eavesdropping. Background Technique

[0002] In recent years, with the rapid development of electronic technology, various digital products with recording functions have emerged in an endless stream. In some classified places, lawbreakers use various eavesdropping devices for eavesdropping, and these eavesdropping devices are extremely concealed and difficult to prevent.

[0003] Precisely due to the emergence and wide application of these digital products with recording functions and dedicated eavesdropping devices, enterprises, government departments and even individuals often encounter the problem of being maliciously eavesdropped and recorded, which seriously violates people's personal privacy and the secrets of enterprises and government departments.

[0004] Common anti - eavesdropping methods mainly restrict the carrying of eavesdropping devices. However, since most current portable digital products such as mobile phones have recording functions, and at the same time, dedicated eavesdropping devices are extremely concealed and difficult to detect, this anti - eavesdropping method of restricting the carrying of eavesdropping devices cannot effectively achieve the effect of preventing eavesdropping.

[0005] In order to avoid and prevent being eavesdropped, people have also designed to use electromagnetic fields to interfere with electromagnetic recording. However, most current recording devices have good anti - electromagnetic interference functions, so this anti - eavesdropping method based on electromagnetic interference cannot effectively achieve the effect of preventing eavesdropping.

[0006] Therefore, there is an urgent need to design a device with good anti - eavesdropping function at present. The anti - eavesdropping device has great practical significance and wide application value. Content of the Utility Model

[0007] The purpose of the utility model is to provide an ultrasonic band interference device for anti - eavesdropping to solve the problems mentioned in the background technique.

[0008] To achieve the above - mentioned purpose, the utility model provides an ultrasonic band interference device for anti - eavesdropping, including a switch module, a microphone array connected to the switch module, a voice processing module connected to the microphone array, a processor connected to the output end of the voice processing module, a formant generator module and a noise module connected to the output end of the processor, an adder connected to the output end of the pulse sequence module, a modulator connected to the output end of the adder, an ultrasonic transducer array connected to the output end of the modulator, and an ultrasonic array generator connected to the input end of the modulator.

[0009] Preferably, the voice processing module includes a feature extraction module, a voiceprint detection module, and a memory. The feature extraction module is used to extract keywords from voice data, and the voiceprint detection module is used to identify whether the voiceprint feature parameters are consistent with the preset voiceprint feature parameters in the memory.

[0010] Preferably, the pulse sequence module includes a formant generator 1 and a formant generator 2, and the frequencies and widths of the formant generator 1 and the formant generator 2 are different.

[0011] Preferably, the output end of the noise module is connected to the input end of the modulator, and a loudspeaker is also connected. The noise module includes a white noise module and a voice-like module.

[0012] Preferably, the processor controls the activation and beam direction of the ultrasonic transducer array, and the ultrasonic transducer array emits ultrasonic carrier interference signals in a specified direction.

[0013] Preferably, the processor is connected to a terminal device through a communication chip, and the size of white noise, voice-like, and ultrasonic carrier interference signals is controlled through the terminal device.

[0014] Preferably, a power amplifier is provided between the modulator and the ultrasonic transducer array.

[0015] Therefore, the ultrasonic band interference device for anti-eavesdropping adopting the above structure in the present invention has the following beneficial effects:

[0016] (1) Ultrasonic transducers are spatially distributed and arranged to form a transmitting array. The beam main lobe width of the interference signal is relatively narrow, the directivity is better, the energy is more concentrated, the power density is high, the coverage range is wide, and the interference effect on the recording eavesdropping device is better;

[0017] (2) White noise, voice-like, and ultrasonic interference signals can be combined in pairs to meet the requirements of users under various conditions.

[0018] Next, through the drawings and embodiments, the technical solutions of the present invention will be further described in detail. Description of the Drawings

[0019] Figure 1 It is a schematic diagram of the overall structure of an embodiment of an ultrasonic band interference device for anti-eavesdropping of the present invention;

[0020] Figure 2 It is a schematic diagram of the voice module of an embodiment of an ultrasonic band interference device for anti-eavesdropping of the present invention;

[0021] Figure 3Schematic diagram of the pulse sequence module of an embodiment of an ultrasonic interference device for anti-eavesdropping according to the present utility model;

[0022] Figure 4 Internal structure diagram of a specific embodiment of the present utility model;

[0023] Figure 5 Overall structure diagram of a specific embodiment of the present utility model;

[0024] Figure 6 Schematic diagram of the hemispherical device of a specific embodiment of the present utility model;

[0025] Reference numerals

[0026] 1, housing; 2, filter barrel; 3, placement table; 4, integrated device; 5, hemispherical device; 6, wireless microphone array. Specific implementation manners

[0027] The technical solutions of the present utility model will be further described below with reference to the drawings and embodiments.

[0028] Unless otherwise defined, the technical terms or scientific terms used in the present utility model shall have the ordinary meanings understood by those of ordinary skill in the field to which the present utility model belongs. The "first", "second" and similar terms used in the present utility model do not denote any order, quantity or importance, but are only used to distinguish different components. The terms such as "comprising" or "including" mean that the elements or objects appearing before this term cover the elements or objects listed after this term and their equivalents, without excluding other elements or objects. The terms such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left", "right" are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0029] Embodiment

[0030] As Figures 1-3 shown, the present utility model adopts an ultrasonic interference device for anti-eavesdropping with the above structure, including a switch module, a microphone array connected to the switch module, a voice processing module connected to the microphone array, a processor connected to the output end of the voice processing module, a formant generator module and a noise module connected to the output end of the processor, an adder connected to the output end of the pulse sequence module, a modulator connected to the output end of the adder, an ultrasonic transducer array connected to the output end of the modulator, and an ultrasonic array generator connected to the input end of the modulator.

[0031] The voice processing module includes a feature extraction module, a voiceprint detection module, and a memory. The feature extraction module is used to extract keywords from voice data, and the voiceprint detection module is used to identify whether the voiceprint feature parameters are consistent with the preset voiceprint feature parameters in the memory. The voiceprint features preset in the memory belong to the protected person. When it is detected that the protected person says the keyword to turn on the anti-interference device, the default mode of the device can be turned on through the processor, and the default mode can be set by the user himself.

[0032] The pulse sequence module includes a formant generator I and a formant generator II, and the frequencies and widths of the formant generator I and the formant generator II are different.

[0033] The noise module is connected to a loudspeaker, and the noise module includes a white noise module and a voice-like module. The processor is connected to a terminal device through a communication chip, and the sizes of white noise, voice-like, and ultrasonic carrier interference signals are controlled through the terminal device. The white noise, voice-like, and ultrasonic carrier interference signals can be combined in pairs. According to the user's custom selection mode, only ultrasonic waves can be selected for interference when not wanting to be detected.

[0034] The processor controls the activation and beam direction of the ultrasonic transducer array, and the ultrasonic transducer array emits ultrasonic carrier interference signals in a specified direction.

[0035] A power amplifier is provided between the modulator and the ultrasonic transducer array.

[0036] The device is externally connected to a power supply, and the circuit of the device can be integrated in various devices, and only an external power supply is required.

[0037] The microphone array is formed by arranging multiple microphones in space with a distance between microphones being half the wavelength of the average fundamental tone of the protected person's voice.

[0038] The formant generator refers to a pulse sequence generator that can generate multiple periodic pulse sequences simultaneously and can satisfy a frequency band width of 0 - 20 KHz.

[0039] The signal frequency emitted by the ultrasonic array generator is 20 kHz - 20 MHz.

[0040] The ultrasonic transducer array refers to multiple ultrasonic transducers arranged in space with a distance between ultrasonic transducers being half the wavelength of ultrasonic waves.

[0041] Specific embodiments are as follows Figures 4-6Specifically, the above modules are arranged in a vertical air purifier, including a shell 1, a mesh is arranged on the top of the shell 1, a wireless microphone array 6 is arranged below the mesh inside the shell 1, two filter barrels 2 are arranged below the wireless microphone array 6, a placement table 3 is arranged between the two filter barrels 2, a placement slot is arranged on the placement table 3, and an integrated device 4 is placed in the placement slot, and the integrated device 4 integrates a speech processing module, a processor, a resonance peak generator module, a noise module, a pulse sequence module, an adder, a modulator, an ultrasonic array generator and a power amplifier. A hemispherical device 5 that can be rotated by a processor is arranged in front of the shell, and an ultrasonic transducer array is arranged inside.

[0042] A switch and a disassembly window corresponding to the positions of the two filter barrels 2 are arranged at the rear of the housing 1 .

[0043] When it is inconvenient to use the terminal device, such as a mobile phone, you can first power on the device through the switch module, and then wake up the device through voice to make the device start to interfere with the eavesdropping device. Or operate the device on the terminal device. If you need to prevent eavesdropping without feeling, just turn on the ultrasonic interference mode, or you can turn on all three at the same time to achieve the best anti-eavesdropping effect. If you think the white noise and voice-like noise are too loud, you can also adjust it on the terminal device.

[0044] The modules are connected in a conventional manner in the prior art, which will not be described in detail here.

[0045] Therefore, the utility model adopts an ultrasonic band interference device for anti-eavesdropping with the above structure, the interference signal has better directionality, more concentrated energy, high power density, wide coverage, and different modes are available, so the anti-eavesdropping effect is better.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that they can still modify or replace the technical solution of the utility model with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the utility model.

Claims

1. An ultrasonic band interference device for anti-eavesdropping, characterized in that: The invention comprises a switch module, a microphone array connected to the switch module, a speech processing module connected to the microphone array, a processor connected to the output end of the speech processing module, a pulse sequence module and a noise module connected to the output end of the processor, an adder connected to the output end of the pulse sequence module, a modulator connected to the output end of the adder, an ultrasonic transducer array connected to the output end of the modulator, and an ultrasonic array generator connected to the input end of the modulator.

2. The ultrasonic band interference device for anti-eavesdropping according to claim 1, characterized in that: The speech processing module includes a feature extraction module, a speech voiceprint detection module and a memory, the feature extraction module is used to extract keywords in the speech data, and the speech voiceprint detection module is used to identify whether the voiceprint feature parameters are consistent with the preset voiceprint feature parameters in the memory.

3. The ultrasonic band interference device for anti-eavesdropping according to claim 1, characterized in that: The pulse sequence module includes a first resonance peak generator and a second resonance peak generator, and the frequencies and widths of the first resonance peak generator and the second resonance peak generator are different.

4. The ultrasonic band interference device for anti-eavesdropping according to claim 1, characterized in that: The output end of the noise module is connected to the input end of the modulator and is also connected to a loudspeaker. The noise module includes a white noise module and a speech-like module.

5. The ultrasonic band interference device for anti-eavesdropping according to claim 4, characterized in that: The processor controls the ultrasonic transducer array to turn on and the beam direction, and the ultrasonic transducer array transmits an ultrasonic carrier interference signal in a specified direction.

6. The ultrasonic band interference device for anti-eavesdropping according to claim 5, characterized in that: The processor is connected to a terminal device via a communication chip, and the magnitude of white noise, speech-like and ultrasonic carrier interference signals is controlled via the terminal device.

7. The ultrasonic band interference device for anti-eavesdropping according to claim 1, characterized in that: A power amplifier is arranged between the modulator and the ultrasonic transducer array.

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