KR102670945B1 - Condenser microphone neutralizing device - Google Patents

Abstract

The present invention relates to a condenser microphone neutralization device.
The present invention relates to a main body, a jamming sound output unit installed on the outer surface of the main body and including a plurality of directional speakers that output jamming sounds in a preset jamming frequency band, and a jamming sound output unit installed on the upper surface of the main body and surrounding the main body. Analyzing the ambient sound detection unit that detects sound and the tone of the ambient sound received from the ambient sound detection unit, the tone of the jamming sound is harmonized with the tone of the ambient sound within the jamming frequency band. Preferably, it includes a controller that controls the operation of a plurality of directional speakers constituting the jamming sound output unit.
According to the present invention, the function of a condenser microphone that can be used for wiretapping, unauthorized recording, etc. can be disabled while minimizing the impact on the hearing of users located nearby.

Description

Condenser microphone neutralizing device {CONDENSER MICROPHONE NEUTRALIZING DEVICE}

The present invention relates to a condenser microphone neutralization device. More specifically, the present invention relates to a condenser microphone neutralization device that can disable the function of a condenser microphone that can be used for wiretapping, unauthorized recording, etc., while minimizing the impact on the hearing of users located nearby.

In proportion to the progress of information and communication technology, problems caused by information leakage are emerging in various forms.

In other words, with the current development of various wireless communication devices, various illegal wiretaps and hidden cameras are being used, seriously infringing on individual privacy and human rights, or leaking national secrets, which is becoming a social problem. This is the situation. Accordingly, the country is making efforts to prevent this through legal regulations and policies, and at the individual level, efforts are being made to avoid being exposed to illegal wiretapping and hidden cameras by using various detection devices that can detect wiretaps and hidden cameras. I'm leaning.

As a prior art related to this, a technology is known to disable the illegal microphone by outputting sound waves in a frequency band that cannot be perceived by humans through an illegal microphone.

However, according to this prior art, there is a problem that interference occurs between sound waves output to neutralize illegal microphones, and the frequency band of this interfering sound wave can be changed to a band that can be perceived by humans.

Registered Patent Publication No. 10-0731816 (Registration date: June 18, 2007, Name: Wiretapping prevention method and device using sound waves) Publication of Patent No. 10-2015-0093132 (Publication date: August 17, 2015, Name: Speaker with improved directivity performance)

The technical task of the present invention is to provide a condenser microphone neutralization device that can neutralize the function of a condenser microphone that can be used for wiretapping, unauthorized recording, etc., while minimizing the impact on the hearing of users located nearby.

The condenser microphone neutralization device according to the present invention for solving this technical problem is installed on the main body, the outer surface of the main body, and includes a plurality of directional speakers that output jamming sounds in a preset jamming frequency band. A jamming sound output unit, an ambient sound detection unit installed on the upper surface of the main body to detect ambient sound, and the tone of the ambient sound received from the ambient sound detection unit are analyzed, and the tone of the jamming sound is determined by the jamming frequency. and a controller that controls the operation of a plurality of directional speakers constituting the jamming sound output unit so as to harmonize with the tone of the surrounding sound within the band.

In the condenser microphone neutralization device according to the present invention, the plurality of jamming sounds output by the plurality of directional speakers constituting the jamming sound output unit are generated by forcibly vibrating the diaphragm of the condenser microphone located in the direction in which the plurality of jamming sounds travel. It is characterized by disabling the function of the microphone.

In the condenser microphone neutralization device according to the present invention, the jamming frequency band is 20 kHz or more and 30 kHz or less.

In the condenser microphone neutralization device according to the present invention, the jamming sound output unit is installed on the outer surface of the main body so that the plurality of directional speakers are individually built in, and the plurality of jamming sounds output by the plurality of directional speakers are transmitted to the main body. It guides in a direction perpendicular to the outer surface to prevent interference between the plurality of jamming sounds, and further includes a plurality of jamming sound guides having a cylindrical shape.

In the condenser microphone neutralization device according to the present invention, the plurality of directional speakers and the plurality of jamming sound guides constituting the jamming sound output unit are installed on the outer surface of the main body to have a radial distribution perpendicular to the outer surface of the main body. It is characterized by having

In the condenser microphone neutralizing device according to the present invention, the main body is characterized in that it has a cylindrical or rectangular parallelepiped shape.

In the condenser microphone neutralization device according to the present invention, the controller is a tone analyzer that analyzes the tone of the ambient sound received from the ambient sound detection unit, and the tone of the jamming sound is determined by the ambient sound within the jamming frequency band. A harmony controller for controlling the operation of a plurality of directional speakers constituting the jamming sound output unit to harmonize the tone of the jamming sound output unit, and controlling the operation timing of the ambient sound detection unit and a plurality of directional speakers constituting the jamming sound output unit. Characterized by including a timing controller.

In the condenser microphone neutralization device according to the present invention, the tone analyzer extracts the frequency components of the surrounding sound for a set extraction time, and the frequency with the highest extraction frequency among the frequency components extracted during the extraction time represents the extraction time. is specified as the representative frequency of the surrounding sound, and the average value of the amplitude of the surrounding sound during the extraction time is specified as the representative amplitude of the surrounding sound representing the extraction time, and the specified representative frequency and the representative amplitude are harmonized. It is characterized in that it is transmitted to the controller.

In the condenser microphone neutralization device according to the present invention, the harmonic controller controls the frequency of the jamming sound output from the plurality of directional speakers constituting the jamming sound output unit to be proportional to the representative frequency of the surrounding sound within the jamming frequency band. And, the amplitude of the jamming sound is controlled to be proportional to the representative amplitude of the surrounding sounds.

In the condenser microphone disabling device according to the present invention, the timing controller controls to detect the ambient sound by activating the ambient sound detector for a set detection time, and detects the ambient sound by the ambient sound detector during the detection time. When detected, the jamming sound output unit is activated for a jamming time set longer than the detection time to control the jamming sound to be output through a plurality of directional speakers constituting the jamming sound output unit, and the surrounding sound is detected during the detection time. When the ambient sound is not detected by the unit, the ambient sound detection unit is controlled to switch to standby mode during a waiting time that is longer than the detection time and shorter than the jamming time, and when the waiting time has elapsed, the ambient sound is detected. The control unit is re-activated during the detection time to re-detect the ambient sound.

According to the present invention, there is an effect of providing a condenser microphone neutralizing device that can neutralize the function of a condenser microphone that can be used for purposes such as eavesdropping and unauthorized recording while minimizing the impact on the hearing of users located nearby.

1 is a diagram functionally showing a condenser microphone neutralization device according to an embodiment of the present invention,
Figure 2 is a diagram showing an exemplary external shape of a condenser microphone neutralizing device according to an embodiment of the present invention;
Figure 3 is a diagram showing an exemplary top shape of a configuration in which the protective net is removed from the condenser microphone neutralization device according to an embodiment of the present invention;
Figure 4 is a diagram showing an exemplary shape of a plurality of directional speakers constituting a jamming sound output unit and a jamming sound guide installed on the outer surface of the main body, according to an embodiment of the present invention;
Figure 5 is a diagram illustrating the overall operating configuration of the condenser microphone neutralization device according to an embodiment of the present invention;
FIG. 6 is a diagram illustrating a specific control operation of a controller according to an embodiment of the present invention.

Specific structural or functional descriptions of the embodiments according to the concept of the present invention disclosed in this specification are merely illustrative for the purpose of explaining the embodiments according to the concept of the present invention, and the embodiments according to the concept of the present invention are presented in various forms. It can be implemented in various ways and is not limited to the embodiments described in this specification.

Since the embodiments according to the concept of the present invention can make various changes and have various forms, the embodiments will be illustrated in the drawings and described in detail in this specification. However, this is not intended to limit the embodiments according to the concept of the present invention to specific disclosed forms, and includes all changes, equivalents, or substitutes included in the spirit and technical scope of the present invention.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the technical field to which the present invention pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and unless clearly defined in this specification, should not be interpreted in an idealized or excessively formal sense. .

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

Figure 1 is a functional diagram showing a condenser microphone neutralizing device 1 according to an embodiment of the present invention, and Figure 2 shows an exemplary external shape of a condenser microphone neutralizing device 1 according to an embodiment of the present invention. It is a drawing, and Figure 3 is a diagram showing the top shape of the condenser microphone neutralization device 1 according to an embodiment of the present invention with the protective net removed, and Figure 4 is a jamming sound output unit according to an embodiment of the present invention. This is a diagram showing an exemplary shape of a plurality of directional speakers 22 and a jamming sound guide 24 constituting (20) installed on the outer surface of the main body 10.

1 to 4, the condenser microphone neutralization device 1 according to an embodiment of the present invention includes a main body 10, a jamming sound output unit 20, an ambient sound detection unit 30, and a controller 40. It is composed including.

The main body 10 functions as a body in which the components of the condenser microphone neutralizing device 1 according to an embodiment of the present invention are built in or installed.

For example, the main body 10 may be configured to have a cylindrical or rectangular shape, but is not limited thereto. The main body 10 is configured so that the directional speaker 22, which constitutes a jamming sound output unit to be described later, transmits the jamming sound in all directions. It can have any shape that can provide a base on which the directional speaker 22 is installed to output output.

The jamming sound output unit 20 is a component that outputs jamming sounds to the surrounding space. If a condenser microphone used for purposes such as illegal wiretapping or illegal recording is hidden in the surrounding space, the jamming sound output unit 20 The jamming sound output neutralizes the function of the hidden condenser microphone.

For example, the jamming sound output unit 20 may be configured to include a plurality of directional speakers 22 and a plurality of jamming sound guides 24.

The plurality of directional speakers 22 are installed on the outer surface of the main body 10 and are components that output jamming sounds in a preset jamming frequency band.

For example, the jamming frequency band may be 20 kHz or more and 30 kHz or less, and the plurality of jamming sounds output by the plurality of directional speakers 22 constituting the jamming sound output unit 20 are located in the direction of travel of the plurality of jamming sounds. It may be configured to disable the function of the condenser microphone by forcibly vibrating the diaphragm of the condenser microphone.

The reason for this configuration is as follows: Sound waves with a frequency range between 20 kHz and 30 kHz are difficult for the average person to perceive auditorily. An embodiment of the present invention uses this to use jamming sounds output by a plurality of topographic speakers when a condenser microphone used for purposes such as illegal wiretapping and illegal recording is hidden in the surrounding space. disables the function of

The plurality of jamming sound guides 24 are installed on the outer surface of the main body 10 so that the plurality of directional speakers 22 are individually built in, and direct the plurality of jamming sounds output from the plurality of directional speakers 22 to the main body 10. It guides in a vertical direction with respect to the outer surface of the to prevent interference between a plurality of jamming sounds and is configured to have a cylindrical shape.

For example, the plurality of directional speakers 22 and the plurality of jamming sound guides 24 constituting the jamming sound output unit 20 are positioned in the main body 10 to have a radial distribution perpendicular to the outer surface of the main body 10. It can be installed on the outer side of. Through this configuration, the jamming sound output unit 20 outputs the jamming sound not only in one direction in which the user is looking at the other party, but also in the other direction in which the other party is looking at the user, and in a space corresponding to a random position between one direction and the other direction. can be output.

The ambient sound detection unit 30 is installed on the upper surface of the main body 10 and is a component that detects ambient sounds, including the voices of the conversationalists, in the surrounding space where the conversationalists, including the user and the other party, are located.

The controller 40 analyzes the tone of the surrounding sound received from the surrounding sound detection unit 30, and ensures that the tone of the jamming sound output is harmonized with the tone of the analyzed surrounding sound within the jamming frequency band. The operation of the plurality of directional speakers 22 constituting the jamming sound output unit 20 is controlled. According to this configuration of the controller 40, since the jamming sound is harmonized and similar to the surrounding sound, the possibility that the jamming sound will be audibly perceived by the conversationalists is further reduced.

For example, controller 40 may include a tone analyzer 42, a harmonic controller 44, and a timing controller 46.

The tone analyzer 42 is a component that analyzes the tone of the ambient sound received from the ambient sound detection unit 30.

For example, the tone analyzer 42 extracts the frequency components of the surrounding sound during a preset extraction time, and selects the frequency with the highest extraction frequency among the frequency components extracted during the extraction time as the representative frequency of the surrounding sound representing the extraction time. It may be configured to specify the average value of the amplitudes of the surrounding sounds during the extraction time as the representative amplitude of the surrounding sounds representing the extraction time, and to transmit the specified representative frequency and representative amplitude to the harmonic controller 44.

The harmony controller 44 is a component that controls the operation of a plurality of directional speakers 22 constituting the jamming sound output unit 20 so that the tones of the jamming sound are harmonized with the tones of surrounding sounds within the jamming frequency band. am.

For example, the harmonic controller 44 controls the frequency of the jamming sound output by the plurality of directional speakers 22 constituting the jamming sound output unit 20 so that it is proportional to the representative frequency of surrounding sounds within the jamming frequency band. , the amplitude of the jamming sound can be controlled to be proportional to the representative amplitude of the surrounding sounds. For example, the jamming frequency band may be 20 kHz or more and 30 kHz or less, and the frequency of the jamming sound controlled by the harmonic controller 44 does not deviate from this jamming frequency band, so it is highly unlikely that talkers will auditorily perceive the jamming sound. It is low, and since the jamming sound is harmonized and similar to the surrounding sound according to the frequency control and amplitude control by the harmony controller 44, the possibility of the jamming sound being perceived auditorily by the conversationalists is further reduced.

The timing controller 46 is a component that controls the operation timing of the plurality of directional speakers 22 that constitute the ambient sound detection unit 30 and the jamming sound output unit 20.

For example, the timing controller 46 controls 1) the ambient sound detection unit 30 to be activated for a set detection time to detect the ambient sound, and 2) the ambient sound detection unit 30 during the detection time to detect the ambient sound. When sound is detected, the jamming sound output unit 20 is activated for a jamming time set longer than the detection time to control the jamming sound to be output through the plurality of directional speakers 22 constituting the jamming sound output unit 20. , 3) If the ambient sound is not detected by the ambient sound detector 30 during the detection time, the ambient sound detector 30 is controlled to switch to standby mode for a waiting time longer than the detection time and shorter than the jamming time, 4) When the standby time has elapsed, the ambient sound detection unit 30 can be reactivated during the detection time to re-detect the ambient sound. According to this configuration, the components constituting the condenser microphone neutralizing device 1 according to an embodiment of the present invention can be operated only when necessary, thereby suppressing unnecessary power consumption.

Hereinafter, the operation of the condenser microphone disabling device 1 according to an embodiment of the present invention will be described with additional reference to FIGS. 5 and 6.

Figure 5 is a diagram for exemplarily explaining the overall operation configuration of the condenser microphone neutralization device 1 according to an embodiment of the present invention, and Figure 6 is a detailed diagram of the controller 40 in an embodiment of the present invention. This diagram is intended to illustrate control operations by way of example.

Referring further to FIGS. 5 and 6, in step S10, when the user presses a power button (not shown) to operate the condenser microphone disabling device 1 according to an embodiment of the present invention, the controller ( 40 activates the ambient sound detection unit 30 for a preset detection time, and the ambient sound detection unit 30 detects the ambient sound and transmits it to the controller 40. For example, the detection time may be 0.5 seconds, but is not limited thereto.

In step S20, the controller 40 analyzes data transmitted by the ambient sound detection unit 30 to determine whether ambient sound has been detected. As a result of the determination in step S20, if a surrounding sound is detected, the process switches to step S40, and if not, the process switches to step S30.

In step S30, if the ambient sound is not detected by the ambient sound detector 30 during the detection time, the control unit switches the ambient sound detector 30 to standby mode for a waiting time longer than the detection time and shorter than the jamming time. The control process is carried out. When the standby time has elapsed, the control unit reactivates the ambient sound detection unit 30 during the detection time to re-detect the ambient sound. For example, the standby time may be 1 second and the jamming time may be 2 seconds, but are not limited thereto.

In step S40, the controller 40 analyzes the tone of the ambient sound received from the ambient sound detector 30.

Referring to the example of FIG. 6, the process of the controller 40 analyzing the tone of the ambient sound received from the ambient sound detector 30 may include steps S42 to S48.

In step S42, the tone analyzer 42 extracts the frequency component of the ambient sound received from the ambient sound detector 30 for a preset extraction time.

In step S44, the tone analyzer 42 performs a process of specifying the frequency with the highest extraction frequency among the frequency components extracted during the extraction time as the representative frequency of the surrounding sound representing the extraction time.

In step S45, the tone analyzer 42 performs a process of specifying the average value of the amplitude of the surrounding sounds during the extraction time as the representative amplitude of the surrounding sounds representing the extraction time.

In step S48, the tone analyzer 42 transmits the specified representative frequency and representative amplitude to the harmonic controller 44.

In step S50, the harmony controller 44 controls the operation of the plurality of directional speakers 22 constituting the jamming sound output unit 20 so that the tones of the jamming sound are harmonized with the tones of surrounding sounds within the jamming frequency band. This is done.

Referring to the example of FIG. 6, the harmony controller 44 operates the plurality of directional speakers 22 that configure the jamming sound output unit 20 so that the tones of the jamming sound are harmonized with the tones of surrounding sounds within the jamming frequency band. The process of controlling may include steps S52 and S54.

In step S52, the harmonic controller 44 controls the frequency of the jamming sound output by the plurality of directional speakers 22 constituting the jamming sound output unit 20 to be proportional to the representative frequency of surrounding sounds within the jamming frequency band. The process is carried out.

In step S54, the harmonic controller 44 controls the amplitude of the jamming sound to be proportional to the representative amplitude of the surrounding sounds.

As described in detail above, according to the present invention, there is a condenser microphone neutralization device ( 1) has the effect of being provided.

1: Condenser microphone neutralizer
10: body
20: Jamming sound output section
22: Directional speaker
24: Jamming sound guide
30: Ambient sound detection unit
40: controller
42: Tone analyzer
44: Harmonic controller
46: Timing controller

Claims (10)

main body;
A jamming sound output unit installed on the outer surface of the main body and including a plurality of directional speakers that output jamming sounds in a preset jamming frequency band;
an ambient sound detection unit installed on the upper surface of the main body to detect ambient sounds; and
A plurality of devices configured to analyze the tone of the ambient sound received from the ambient sound detection unit and configure the jamming sound output unit to harmonize the tone of the jamming sound with the tone of the ambient sound within the jamming frequency band. It includes a controller that controls the operation of the directional speaker,
The controller is,
a tone analyzer that analyzes the tone of the ambient sound received from the ambient sound detection unit;
a harmony controller that controls the operation of a plurality of directional speakers constituting the jamming sound output unit so that the tone of the jamming sound is harmonized with the tone of the surrounding sound within the jamming frequency band; and
A timing controller that controls the operation timing of a plurality of directional speakers constituting the ambient sound detection unit and the jamming sound output unit,
The tone analyzer,
The frequency components of the ambient sound are extracted for a set extraction time, and the frequency with the highest extraction frequency among the frequency components extracted during the extraction time is specified as the representative frequency of the ambient sound representing the extraction time, and the ambient sound is A condenser microphone neutralizing device that specifies an average value of amplitude during the extraction time as a representative amplitude of the ambient sound representing the extraction time, and transmits the specified representative frequency and representative amplitude to the harmonic controller.
According to paragraph 1,
A plurality of jamming sounds output from a plurality of directional speakers constituting the jamming sound output unit disable the function of the condenser microphone by forcibly vibrating the diaphragm of the condenser microphone located in the direction in which the plurality of jamming sounds travel. Condenser microphone neutralizer.
According to paragraph 2,
A condenser microphone neutralization device, characterized in that the jamming frequency band is 20 kHz or more and 30 kHz or less.
According to paragraph 1,
The jamming sound output unit,
The plurality of directional speakers are installed on the outer surface of the main body so that they are individually built in, and guide the plurality of jamming sounds output by the plurality of directional speakers in a vertical direction with respect to the outer surface of the main body to prevent interference between the plurality of jamming sounds. A condenser microphone neutralizing device, characterized in that it prevents and further includes a plurality of jamming sound guides having a cylindrical shape.
According to clause 4,
A condenser microphone neutralizing device, characterized in that the plurality of directional speakers and the plurality of jamming sound guides constituting the jamming sound output unit are installed on the outer surface of the main body so as to have a radial distribution perpendicular to the outer surface of the main body.
According to clause 5,
A condenser microphone neutralizing device, characterized in that the main body has a cylindrical or rectangular parallelepiped shape.
delete delete According to paragraph 1,
The harmonic controller,
The frequency of the jamming sound output by the plurality of directional speakers constituting the jamming sound output unit is controlled to be proportional to the representative frequency of the surrounding sound within the jamming frequency band, and the amplitude of the jamming sound is equal to the representative amplitude of the surrounding sound. A condenser microphone neutralizing device, characterized in that it is controlled to be proportional.
According to paragraph 1,
The timing controller is,
Controlling the ambient sound detection unit to detect the ambient sound by activating it for a set detection time,
When the ambient sound is detected by the ambient sound detector during the detection time, the jamming sound output unit is activated for a jamming time set longer than the detection time to detect the jamming sound through a plurality of directional speakers constituting the jamming sound output unit. Controls sound output,
If the ambient sound is not detected by the ambient sound detector during the detection time, control the ambient sound detector to switch to standby mode for a standby time longer than the detection time and shorter than the jamming time,
When the waiting time has elapsed, the condenser microphone neutralizing device is characterized in that it is controlled to re-detect the ambient sound by reactivating the ambient sound detection unit during the detection time.