Terminal anti-eavesdropping device and system thereof
By incorporating a connection module and an audio management module into the terminal anti-eavesdropping device, the problem of users finding it difficult to conveniently prevent eavesdropping is solved. This enables eavesdropping prevention without the need for a microphone and is applicable to a variety of terminal devices.
Patent Information
- Application Number
- CN202422880501.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-22
- Publication Date
- 2025-11-11
- Estimated Expiration
- 2034-11-22
AI Technical Summary
In existing technologies, it is difficult for users to easily prevent eavesdroppers from obtaining audio signals through the terminal, and the operating system settings are cumbersome and complicated.
Design a terminal anti-eavesdropping device, comprising a housing, a connection module, and an audio management module. The connection module establishes a communication connection with an external terminal, and the audio management module has a built-in preset audio signal that is transmitted to the external terminal through the connection module to simulate an external microphone to prevent eavesdropping.
It prevents eavesdroppers from obtaining terminal audio signals without setting up a microphone. It is simple to operate, effective, and applicable to a variety of terminal devices.
Smart Images
Figure CN223540678U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of anti-eavesdropping technology, and in particular to a terminal anti-eavesdropping device and system. Background Technology
[0002] With the rapid development of internet technology and the increasing popularity of internet terminals, people have entered the digital internet era. At the same time, incidents of eavesdropping on user privacy based on internet terminals occur frequently. For example, eavesdroppers can use software installed on the eavesdropped party's terminal to activate the terminal's microphone without the eavesdropped party's knowledge, thereby achieving eavesdropping.
[0003] In the terminal's operating system settings, users can manually view the list of applications that access the device's microphone. If an application is found to have inappropriate microphone access, its permissions should be revoked, and the application should even be considered for deletion. However, while the terminal's operating system provides a way to view the device's built-in microphone access permissions and perform actions such as enabling / disabling it, it is still somewhat cumbersome and complex for most users.
[0004] Therefore, it is necessary to provide an easy-to-operate terminal anti-eavesdropping device to prevent eavesdroppers from obtaining audio signals of the terminal's usage environment through the terminal. Utility Model Content
[0005] The technical problem to be solved by this utility model embodiment is to provide a terminal anti-eavesdropping device and system that is easy to operate, so as to prevent eavesdroppers from obtaining audio signals of the terminal's usage environment through the terminal.
[0006] This utility model discloses a housing and a connection module and an audio management module disposed within the housing. The connection module is used to establish a communication connection with an external terminal to obtain audio control permissions of the external terminal. The audio management module is connected to the connection module and has a built-in preset audio signal, which can be transmitted to the external terminal through the connection module.
[0007] Optionally, the connection module is a connector for inserting into the external interface of an external terminal. The connector can be a Micro-USB connector, a Type-C connector, a Lightning connector, or a headphone plug.
[0008] Optionally, when the connector is a Type-C connector, the Type-C connector is provided with a first data transmission pin and a communication pin. The communication pin is used to perform handshake communication with an external terminal to establish a communication connection. The audio management module includes a DSP chip for pre-storing preset audio signals. The DSP chip is provided with a second data transmission pin, which is connected to the first data transmission pin.
[0009] Optionally, the terminal anti-eavesdropping device further includes a circuit board disposed within the housing, the audio management module and the connector disposed on the circuit board, the housing includes an abutment end face, the connector portion is exposed on the abutment end face, and after the connector is inserted into the external terminal, the abutment end face of the housing abuts against the periphery of the external interface of the external terminal.
[0010] Optionally, the audio management module further includes an audio signal generation circuit, which includes a transistor, a resistor, and a capacitor. The base of the transistor is grounded, the collector is floating, and the emitter is connected to one end of the resistor and one end of the capacitor. The other end of the resistor is connected to a power supply, and the other end of the capacitor is connected to the connection module for outputting white noise as the preset audio signal.
[0011] Optionally, the audio management module further includes a filter connected to the other end of the capacitor. The filter is used to filter the white noise and output colored noise as the preset audio signal.
[0012] Optionally, the connection module is a remote communication connector, which establishes a communication connection with an external terminal via a hotspot network, cellular network, Bluetooth, StarFlash, or WIFI.
[0013] Optionally, the terminal anti-eavesdropping device further includes a switch button for turning on the terminal anti-eavesdropping device, and the switch button is connected to the audio management module.
[0014] Optionally, the terminal anti-eavesdropping device further includes an indicator light for indicating the working status of the terminal anti-eavesdropping device. The indicator light is connected to the audio management module and is exposed on the outer surface of the housing.
[0015] This utility model also discloses a terminal anti-eavesdropping system, including a terminal and the terminal anti-eavesdropping device as described above. The terminal can establish a communication connection with the connection module of the terminal anti-eavesdropping device and receive a preset audio signal.
[0016] Compared with the prior art, the beneficial effects of the terminal anti-eavesdropping device provided in this utility model embodiment are as follows: by setting a connection module and an audio management module in the housing, the connection module can establish a communication connection with an external terminal to obtain the audio control authority of the external terminal. The audio management module has a built-in preset audio signal and can transmit the built-in preset audio signal to the external terminal with which it communicates through the connection module. The terminal anti-eavesdropping device of this application can convert the microphone acquisition inside the external terminal to the acquisition of an external microphone. Without setting a microphone, it simulates the external microphone of the external terminal to return the built-in preset audio signal to the external terminal, preventing the eavesdropper from obtaining the audio signal of the terminal's usage environment through the external terminal, thus achieving anti-eavesdropping and being easy to operate. Attached Figure Description
[0017] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. In the accompanying drawings:
[0018] Figure 1 This is a structural block diagram of an embodiment of the terminal anti-eavesdropping device provided by this utility model;
[0019] Figure 2 This is a structural block diagram of another embodiment of the terminal anti-eavesdropping device provided by this utility model;
[0020] Figure 3 This is a structural block diagram of another embodiment of the terminal anti-eavesdropping device provided by this utility model;
[0021] Figure 4 This is a schematic diagram of the terminal anti-eavesdropping device provided by this utility model in the state of being inserted into an external terminal.
[0022] The labels for the attached figures are as follows:
[0023] 110. Housing; 110a. Abutting end face; 120. Connection module; 121. Type-C connector; 1211. First data transmission pin; 1212. Communication pin; 130. Audio management module; 131. DSP chip; 1311. Second data transmission pin; 132. Audio signal generation circuit; 133. Filter; 140. Switch button; 150. Indicator light;
[0024] Q1, transistor; R1, resistor; C1, capacitor. Detailed Implementation
[0025] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings.
[0026] This utility model embodiment provides a terminal anti-eavesdropping device, such as Figure 1 The device includes a housing 110 and a connection module 120 and an audio management module 130 disposed within the housing 110. The connection module 120 is used to establish a communication connection with an external terminal to obtain audio control permissions from the external terminal. The audio management module 130 is connected to the connection module 120. The audio management module 130 has a built-in preset audio signal and can transmit the preset audio signal to the external terminal through the connection module 120.
[0027] This application incorporates a connection module 120 and an audio management module 130 within the housing 110. The connection module 120 establishes a communication connection with an external terminal to obtain audio control permissions from the external terminal. The audio management module 130 has a built-in preset audio signal and can transmit the built-in preset audio signal to the external terminal through the connection module 120. The terminal anti-eavesdropping device of this application can convert the microphone acquisition inside the external terminal to external microphone acquisition. In the absence of a microphone, it simulates the external microphone of the external terminal and returns the built-in preset audio signal to the external terminal, preventing eavesdroppers from obtaining the real audio signal of the terminal's usage environment through the external terminal, thus achieving anti-eavesdropping and is easy to operate.
[0028] The terminal's audio control permissions refer to its permission to obtain external audio signals. Specifically, when the terminal is not connected to an external device, it uses its built-in microphone as the input source for external audio signals. When the terminal is connected to a terminal anti-eavesdropping device, the connection module 120 of the anti-eavesdropping device acquires the terminal's audio control permissions, and the terminal uses the anti-eavesdropping device as the input source for external audio signals. During this process, the terminal can automatically switch to using the anti-eavesdropping device as the input source after establishing a communication connection with the connection module 120, or it can prompt the user to manually switch. The terminal can be a mobile phone, tablet computer, smart bracelet, or other terminal device.
[0029] The connection module 120 can establish a communication connection with an external terminal in a wired manner or in a wireless manner.
[0030] In an optional embodiment of this application, the connection module 120 is a connector used to insert into the external interface of an external terminal. The connector can be a Micro-USB connector, a Type-C connector 121, a Lightning connector, or a headphone plug. The connector supports audio transmission protocols.
[0031] refer to Figure 1 and Figure 2When the connector is a Type-C connector 121, the Type-C connector 121 is provided with a first data transmission pin 1211 and a communication pin 1212. The communication pin 1212 is used to perform handshake communication with an external terminal to establish a communication connection. The audio management module 130 includes a DSP chip 131 for pre-storing preset audio signals. The DSP chip 131 is provided with a second data transmission pin 1311, which is connected to the first data transmission pin 1211.
[0032] The Type-C connector 121 is a relatively universal standard connector, and its matching Type-C interface is widely used in various terminals, such as mobile phones and tablets. Using the Type-C connector 121 as the connection module 120 ensures compatibility and widespread availability, allowing the terminal anti-eavesdropping device to be used with more different types of terminal devices, exhibiting high compatibility. The Type-C connector 121 supports high-speed data transmission, offering high data transmission speed and stability, ensuring efficient and accurate data transmission. The Type-C connector 121 supports the USB communication protocol, enabling it to establish a communication connection with an external terminal via communication pin 1212, thereby obtaining audio control permissions from the external terminal. The external terminal uses the terminal anti-eavesdropping device as the input source for external audio signals.
[0033] The DSP chip 131 transmits a preset audio signal to the Type-C connector 121 via a connection between the second data transmission pin 1311 and the first data transmission pin 1211. The DSP chip 131 is used to pre-store the preset audio signal, which can be a disordered audio signal, an ordered audio signal, or a blank audio signal. A disordered audio signal is random audio data. An ordered audio signal is audio data that exhibits a certain pattern. A blank audio signal is a signal without sound or audio content, i.e., a silence signal. Specifically, the DSP chip 131 can be an SNC8X series chip.
[0034] Specifically, the disordered audio signal can be generated in the following ways: a random number sequence with equal probability can be generated by a pseudo-random number generator, and the random number sequence can be directly output as a waveform to output the first white noise as the disordered audio signal; or the random number sequence can be mapped to a specific voltage or audio value to output the second white noise as the disordered audio signal. The disordered audio signal is pre-stored in the DSP chip 131, and the DSP chip 131 can transmit the pre-stored disordered audio signal to the connection module 120 through the second data transmission pin 1311, and then transmit it to the external terminal through the connection module 120.
[0035] Alternatively, random noise can be generated as a disordered audio signal using the inverse FFT or deconvolution method, and this generated disordered audio signal is pre-stored in the DSP chip 131. Generating random noise using the inverse FFT method involves generating a set of random frequency domain data, then converting the generated frequency domain data back to time domain data using the inverse FFT, thus generating random noise with specific spectral characteristics. The deconvolution method specifically generates random noise with specific spectral characteristics through the inverse convolution operation of a specific signal. By adjusting the spectral characteristics of the convolution kernel in the inverse convolution operation, a noise signal with specific spectral characteristics can be generated using the deconvolution method. The disordered audio signal generated in the above ways is pre-stored in the DSP chip 131.
[0036] An ordered audio signal is a sound with a fixed pattern or regularity. An ordered audio signal can be a pre-recorded audio file. The audio file is pre-stored in the DSP chip 131. The content of the audio file can be a song, a piece of music, a human voice, a natural sound, or other sounds. Its format can be WAV, MP3, etc.
[0037] Disordered audio signals can be converted into blank audio signals by generating a data stream with all output values being zero. The blank audio signal is pre-stored in the DSP chip 131 and can be transmitted to an external terminal via the connection module 120, where it can be captured and recognized.
[0038] In this embodiment, reference Figure 1 , Figure 2 and Figure 4 The terminal anti-eavesdropping device also includes a circuit board (not shown) disposed inside the housing 110, an audio management module 130 and a connector disposed on the circuit board, the housing 110 includes an abutment end face 110a, the connector portion is exposed on the abutment end face 110a, after the connector is inserted into the external terminal, the abutment end face 110a of the housing 110 abuts against the periphery of the external interface of the external terminal.
[0039] The circuit board serves as a support for the audio management module 130 and the connection module 120, while the housing 110 effectively protects the circuit board from external environmental influences and damage. With the connector portion exposed and inserted into an external terminal, the abutting end face 110a of the housing 110 abuts against the peripheral side of the external interface of the external terminal. This limits the connector's position after insertion, preventing it from becoming loose and ensuring a stable connection between the connector and the external terminal, thus guaranteeing stable data transmission and communication.
[0040] In an optional embodiment of this application, the connection module 120 is a remote communication connector, which establishes a communication connection with an external terminal via a hotspot network, cellular network, Bluetooth, StarFlash, or WIFI.
[0041] When the connection module 120 is a remote communication connector, it can establish a communication connection with an external terminal wirelessly, eliminating the need for physical connection cables, eliminating the steps of plugging and unplugging connectors, simplifying the operation process, and making the device more flexible and convenient.
[0042] Further, refer to Figure 1 The terminal anti-eavesdropping device also includes a switch button 140 for activating the terminal anti-eavesdropping device, and the switch button 140 is connected to the audio management module 130.
[0043] By setting the switch button 140, users can easily turn the terminal anti-eavesdropping device on or off using the switch button 140, which is convenient to use. For example, when the connection module 120 is a connector, users can turn off the terminal anti-eavesdropping device using the switch button 140 without frequent plugging and unplugging; when the connection module 120 is wireless, users can turn off wireless communication using the switch button 140, which is convenient to operate.
[0044] In an optional embodiment of this application, the terminal anti-eavesdropping device further includes an indicator light 150 for indicating the working status of the terminal anti-eavesdropping device. The indicator light 150 is connected to the audio management module 130 and is exposed on the outer surface of the housing 110. The working status is that the terminal anti-eavesdropping device is working and not working.
[0045] By setting indicator light 150, users can observe whether the terminal's anti-eavesdropping device is working or not, thus improving the user experience.
[0046] In an optional embodiment of this application, the audio management module 130 incorporates a preset audio signal via internal circuitry. Specifically, refer to... Figure 3 The audio management module 130 also includes an audio signal generation circuit 132, which includes a transistor Q1, a resistor R1 and a capacitor C1. The base of the transistor Q1 is grounded, the collector is floating, and the emitter is connected to one end of the resistor R1 and one end of the capacitor C1. The other end of the resistor R1 is connected to the power supply, and the other end of the capacitor C1 is connected to the connection module 110 for outputting white noise as a preset audio signal.
[0047] By reversing the base-emitter PN junction of transistor Q1 into the circuit, a Zener voltage of approximately 5 volts is generated. This Zener breakdown phenomenon is used to produce white noise as a preset audio signal. This method requires no complex circuitry or expensive components, resulting in a relatively simple and low-cost circuit. Furthermore, the white noise generated through hardware is less susceptible to external interference, exhibiting high stability and providing real-time, disordered audio signals. Power can be obtained from an external power supply or from a terminal via connection module 120.
[0048] Furthermore, the audio management module 130 also includes a filter 133, which is connected to the other end of the capacitor C1. The filter 133 is used to filter white noise and output colored noise as a preset audio signal.
[0049] By adding a filter 133 to white noise, the frequency components of the spectrum can be controlled. Different filters 133 will produce different types of colored noise. For example, using a low-pass filter can attenuate the high-frequency part of white noise, making the frequency components proportional to 1 / f, forming pink noise; using a low-pass filter 133 to further increase the attenuation makes the spectral components proportional to 1 / f², resulting in a deeper sound, forming brown or red noise; using a high-pass filter to enhance the high-frequency part of white noise makes the sound biased towards higher frequencies, forming blue or purple noise. Low-pass and high-pass filters can use conventional techniques, which will not be elaborated here.
[0050] This application also provides a terminal anti-eavesdropping system, including a terminal and a terminal anti-eavesdropping device as described above. The terminal can establish a communication connection with the connection module 120 of the terminal anti-eavesdropping device and receive a preset audio signal.
[0051] The terminal anti-eavesdropping system of this application includes a connection module 120 and an audio management module 130 housed within the casing 110. The connection module 120 can establish a communication connection with an external terminal to obtain audio control permissions from the external terminal. The audio management module 130 has a built-in preset audio signal and can transmit the built-in preset audio signal to the external terminal through the connection module 120. The terminal anti-eavesdropping device of this application can convert the microphone acquisition inside the external terminal to external microphone acquisition. In the absence of a microphone, it can simulate the external microphone of the external terminal to return the built-in preset audio signal to the external terminal, preventing the eavesdropper from obtaining the real audio signal of the terminal's usage environment through the external terminal, thus achieving anti-eavesdropping and being easy to operate.
[0052] It should be understood that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Those skilled in the art can modify the technical solutions described in the above embodiments, or make equivalent substitutions for some of the technical features; and all such modifications and substitutions should fall within the protection scope of the appended claims of this utility model.
Claims
1. A terminal anti-eavesdropping device, characterized in that, The device includes a housing and a connection module and an audio management module disposed within the housing. The connection module is used to establish a communication connection with an external terminal to obtain audio control permissions from the external terminal. The audio management module is connected to the connection module and has a built-in preset audio signal, which can be transmitted to the external terminal through the connection module.
2. The terminal anti-eavesdropping device according to claim 1, characterized in that, The connection module is a connector used to insert into the external interface of an external terminal. The connector can be a Micro-USB connector, a Type-C connector, a Lightning connector, or a headphone plug.
3. The terminal anti-eavesdropping device according to claim 2, characterized in that, When the connector is a Type-C connector, the Type-C connector is provided with a first data transmission pin and a communication pin. The communication pin is used to perform handshake communication with an external terminal to establish a communication connection. The audio management module includes a DSP chip for pre-storing preset audio signals. The DSP chip is provided with a second data transmission pin, which is connected to the first data transmission pin.
4. The terminal anti-eavesdropping device according to claim 2, characterized in that, The terminal anti-eavesdropping device also includes a circuit board disposed inside the housing, the audio management module and the connector disposed on the circuit board, the housing includes an abutment end face, the connector portion is exposed on the abutment end face, after the connector is inserted into the external terminal, the abutment end face of the housing abuts against the periphery of the external interface of the external terminal.
5. The terminal anti-eavesdropping device according to claim 1, characterized in that, The audio management module also includes an audio signal generation circuit, which includes a transistor, a resistor, and a capacitor. The base of the transistor is grounded, the collector is floating, and the emitter is connected to one end of the resistor and one end of the capacitor. The other end of the resistor is connected to a power supply, and the other end of the capacitor is connected to the connection module for outputting white noise as the preset audio signal.
6. The terminal anti-eavesdropping device according to claim 5, characterized in that, The audio management module also includes a filter, which is connected to the other end of the capacitor and the connection module. The filter is used to filter the white noise and output colored noise as the preset audio signal.
7. The terminal anti-eavesdropping device according to claim 1, characterized in that, The connection module is a remote communication connector, which establishes a communication connection with an external terminal via a hotspot network, cellular network, Bluetooth, StarFlash, or WIFI.
8. The terminal anti-eavesdropping device according to claim 7, characterized in that, The terminal anti-eavesdropping device also includes a switch button for activating the terminal anti-eavesdropping device, and the switch button is connected to the audio management module.
9. The terminal anti-eavesdropping device according to claim 1, characterized in that, The terminal anti-eavesdropping device also includes an indicator light for indicating the working status of the terminal anti-eavesdropping device. The indicator light is connected to the audio management module and is exposed on the outer surface of the housing.
10. A terminal anti-eavesdropping system, characterized in that, The device includes a terminal and a terminal anti-eavesdropping device as described in any one of claims 1-9, wherein the terminal can establish a communication connection with the connection module of the terminal anti-eavesdropping device and receive a preset audio signal.