KR101585199B1 - Apparatus for collecting unusual sound information and system for detecting unusual sound having the same - Google Patents

Abstract

The present invention relates to a sound source collection system which is equipped with a general microphone and uses a sound source collection enabling easy circuit configuration in order to recognize the occurrence of an abnormal situation. According to the present invention, the sound source collection system, which collects information regarding the sound generated near a monitoring area, includes: a speaker housing which has a speaker insertion unit formed thereon to install a speaker; microphone housings which are installed on both ends of the speaker housing while having a microphone insertion unit formed thereon to install a microphone; and a rubber vibration prevention unit which is installed in the microphone insertion unit being inserted into the microphone insertion unit to reduce outside vibration.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an abnormal sound source collecting apparatus and an abnormal sound source detecting system having the same.

The present invention relates to an abnormal sound source collecting apparatus and an abnormal sound source detecting system having the same, and more particularly, to an abnormal sound source detecting apparatus using an abnormal sound source collecting apparatus which is inexpensive and easy in circuit configuration through application of a general microphone, The present invention relates to an abnormal sound source detection system.

CCTV surveillance system is the most widely used device for crime prevention and crime prevention. However, this CCTV surveillance system is vulnerable to the use of acoustic information because the location of the CCTV surveillance system is exposed and operated mainly by analyzing the image information acquired by the camera.

In this connection, there is Korean Patent Laid-Open No. 1997-0064241, entitled " Control Method of Surveillance Camera ".

In addition, a device for detecting an abnormal sound source such as a scream or a destructive sound is being developed by attaching an optical fiber microphone to a CCTV surveillance system. These fiber optic microphones are becoming increasingly used due to their wide range of detection frequency and high durability.

However, in the case of the above-mentioned optical fiber microphones, due to the high manufacturing cost, the manufacturing cost of such an abnormal sound source sensing device is increased.

An object of the present invention is to provide an abnormal sound source detection system which is inexpensive and has a simple circuit configuration.

It is another object of the present invention to provide an abnormal sound source detection system capable of easily and accurately detecting the direction of a collected sound source.

It is another object of the present invention to provide an abnormal sound source detection system capable of reducing the influence of vibration caused by a structure provided with the present invention and improving the detection accuracy of an abnormal sound source.

According to an aspect of the present invention, there is provided an abnormal sound collecting apparatus for collecting information about sounds generated in the vicinity of a surveillance area, comprising: a speaker housing having a speaker inserting section on which speakers can be installed; And a vibration preventing rubber inserted into the microphone inserting portion and installed inside the microphone inserting portion to reduce external vibrations is provided on the other side of the microphone inserting portion, .

Further, the microphone housing can be gradually reduced in cross section from the upper part to the lower part.

The microphone housing further includes a first face adjacent to the speaker housing and a second face opposite to the first face, the upper face and the first face of the speaker housing being formed to be perpendicular to each other, Two sides may not be vertical.

Further, the speaker inserting portion can be opened to connect the cables of the speaker.

Further, the microphone inserting portion can be opened to connect the cable of the microphone.

The vibration-damping rubber may be provided with a communication hole communicating with the opening of the microphone insertion portion.

In addition, a connection bracket for connection to the cover is formed at the upper portion of the speaker housing and the microphone housing, and a binding groove for connection with the binding member may be formed in the cover.

Also, the microphone housing may have a circular or polygonal cross-section.

Further, a through hole is further formed in the lower portion of the microphone housing and the speaker housing, and the heat generated by the speaker and the microphone can be dissipated through the through hole.

In addition, the abnormal sound collector according to an embodiment of the present invention may further include a communication unit for transmitting sound information collected through a microphone to a server.

Also, when the warning broadcast signal is received from the server through the communication unit, the warning broadcast can be performed by the speaker.

In order to solve the above problems, an abnormal sound source detection system for collecting information about sound generated in the vicinity of a surveillance area and detecting an abnormal sound source includes: the abnormal sound source collection device; And a server for detecting an abnormal sound source based on sound information collected from the abnormal sound source collection device.

In addition, the server can track the position of the sound source based on the arrival delay time of the plurality of microphones included in the abnormal sound source collection device.

In addition, the server can track the location of a sound source using a cross-correlation technique.

The server may also apply a weighting function in the frequency domain of the sounds collected from the plurality of microphones and calculate the arrival delay time based on the difference between the peak points of the sounds in the frequency domain.

In addition, the server extracts various feature data of sounds and compares the similarity between the feature data and the ideal sound source feature data, thereby determining whether the extracted sound corresponds to the abnormal sound source.

The abnormal sound source characteristic data may be characteristic data of an abnormal sound source including at least one of a scream of a person, a horn sound of a vehicle, a sudden sound of a vehicle, a broken window sound, an explosion sound, and a vehicle crash sound.

The server further includes an input unit for receiving approval from the control personnel. The server generates a voice warning broadcast signal only when the sound corresponds to the abnormal sound source and the approval is made from the control personnel, To the abnormal sound source collection device.

According to the abnormal sound source detection system of the present invention, since a general microphone is used instead of the optical fiber microphone, the cost is low and the circuit configuration can be easily manufactured.

According to the abnormal sound source detection system of the present invention, the direction in which the abnormal sound source is generated can be accurately detected.

According to the abnormal sound source detection system of the present invention, it is possible to suppress the adverse effect due to the vibration caused by the facilities provided with the abnormal sound source collection device of the present invention through the construction of the anti-vibration rubber.

1 is a conceptual diagram of an abnormal sound source detection system according to an embodiment of the present invention.
2 is a perspective view of an abnormal sound collector according to an embodiment of the present invention.
3 is a plan view of an abnormal sound collector according to an embodiment of the present invention.
4 is a cross-sectional view of an abnormal sound collector according to an embodiment of the present invention.
5 is an enlarged view of a portion A in Fig.
FIG. 6 is a diagram illustrating a sound source position estimation method using an arrival delay time of sound sources collected in the abnormal sound source collection device according to an embodiment of the present invention.
7 is a graph illustrating an example of waveforms of sound sources collected in the abnormal sound collector according to an embodiment of the present invention.
8 is a graph of a waveform to which the cross-correlation technique is applied to the waveform of FIG.
9 is a graph used for calculating the delay time in the waveform of Fig.

The present invention will now be described in detail with reference to the accompanying drawings. Hereinafter, a repeated description, a known function that may obscure the gist of the present invention, and a detailed description of the configuration will be omitted. Embodiments of the present invention are provided to more fully describe the present invention to those skilled in the art. Accordingly, the shapes and sizes of the elements in the drawings and the like can be exaggerated for clarity.

Hereinafter, an abnormal sound source detection system according to an embodiment of the present invention will be described.

1 is a conceptual diagram of an abnormal sound source detection system 1000 according to an embodiment of the present invention. Hereinafter, an abnormal sound source detection system 1000 according to an embodiment of the present invention will be described with reference to FIG. The abnormal sound source detection system 1000 according to an embodiment of the present invention is designed to overcome the disadvantages of the CCTV surveillance system described above. It can detect a sound source that may occur in an emergency situation, for example, a scream, It detects the abnormal sound source such as sound, sudden stop sound, windshield damage sound, explosion sound, vehicle crash sound. To this end, the abnormal sound source detection system 1000 according to an embodiment of the present invention may include an abnormal sound source collection device 100 and a server.

The abnormal sound source collecting apparatus 100 according to an embodiment of the present invention is installed in a facility 10 such as an iron column and collects the abnormal sound sources described above. That is, as shown in FIG. 1, the abnormal sound collector 100 according to the embodiment of the present invention collects screams generated by the victim 20 who is threatened by the attacker 30 And may transmit the collected abnormal sound source to the server 200 through the network 40. [ At this time, the server 200 can determine whether there is an abnormal sound source based on the sound sources collected from the abnormal sound source collection device 100. A detailed description of each configuration included in the abnormal sound source detection system 1000 according to an embodiment of the present invention will be given below.

As described above, the abnormal sound collector 100 according to the embodiment of the present invention collects abnormal sound sources. To this end, the abnormal sound collector 100 according to an embodiment of the present invention is installed in the facility 10 to perform the above-described functions. In addition, the abnormal sound collector 100 according to an embodiment of the present invention may include a plurality of microphones to perform the above-described functions.

Here, the abnormal sound collector 100 according to an embodiment of the present invention may be installed in the facility 10, for example, in a device such as CCTV, electric equipment, Various kinds of vibrations may adversely affect the abnormal sound source collection device 100. Accordingly, the abnormal sound collector 100 of the present invention may include an anti-vibration rubber, and the microphone may be placed on the anti-vibration rubber to avoid adverse effects due to external vibration . Further, the anti-vibration rubber may further include a communication hole communicating with the opening of the microphone insertion portion.

In addition, the abnormal sound collecting apparatus according to an embodiment of the present invention may include a speaker housing having a speaker inserting portion on which a speaker can be installed, and a microphone housing having a microphone inserting portion on which a microphone can be installed . That is, the anti-vibration rubber and the microphone described above can be placed on the microphone insertion portion. Here, the microphone housing has a protruding shape as will be referred to below with reference to Fig. 2, and the cross-sectional surface of the microphone housing has a shape in which the cross-section gradually decreases from the top to the bottom.

The server 200 determines whether or not the sound source is an abnormal sound source based on the sound sources collected from the abnormal sound source collection device 100. To this end, the server 200 first extracts the feature data from the sound sources collected from the abnormal sound collection apparatus 100. Here, the extraction of the feature data can be performed by analyzing the frequency components through a technique such as Fourier transform, for example. Thereafter, the extracted feature data is compared with the abnormal sound source feature data stored in the abnormal sound source storage unit. Here, characteristic data for an abnormal sound source including at least one of a scream of a person, a horn sound of a vehicle, a sudden sound of a vehicle, a break of a windshield, an explosion sound, and a vehicle crash sound is shown. Through this comparison process, it can be determined whether or not the sound source collected from the abnormal sound source collection device 100 corresponds to an abnormal sound source.

Also, the server 200 can calculate the arrival delay time of the sound based on the information collected from the plurality of microphones of the abnormal sound collector 100, and further determine the position of the sound source based on the arrival delay time . Here, the method of determining the location of the sound source based on the arrival delay time will be described in detail below with reference to FIG. 6, and a further explanation will be omitted here.

In addition, if the server 200 determines that the sound source collected on the basis of the abnormal sound collection apparatus 100 is an abnormal sound source, it can prevent the damage by informing the security provider of the sound source. If the abnormal sound source collection device includes a camera or is linked to a CCTV, the corresponding image can be photographed and further used as a proof image. In addition, the server 200 can transmit a voice warning broadcast signal to the abnormal sound source collection device 100 when it is determined that the collected sound source is a real situation. At this time, the abnormal sound collector 100 can broadcast the voice warning broadcast signal through the speaker included in the abnormal sound collector 100. [ That is, through the warning broadcast, the attacker 30 can escape to avoid the situation, so that the safety of the victim 20 can be ensured.

In addition, the server 200 can perform the above-mentioned process after the determination of the abnormal sound source through an approval process through the control personnel. Here, the reason for passing through the approval process through the control personnel is that the sound determined by the server 200 as an abnormal sound source is information that is erroneously detected due to a malfunction of a machine other than an actual situation, for example, It may be a misrecognized sound. Accordingly, in the server 200 according to the embodiment of the present invention, when the collected sound source is determined as an abnormal sound source, the server 200 determines whether the sound source collected through the input of the control agent is an abnormal sound source It is possible to further carry out the checking process.

The above-described input can be made by sending an acknowledgment signal back to the server 200 through the input unit included in the server 200 or after the control staff judges based on the data received from the server 200 . Here, the controller 200 determines whether the actual situation has occurred on the basis of the collected sound source and the corresponding image information in the server 200. Accordingly, only when the approval of the control personnel is provided, the voice warning broadcast can be performed through the speaker included in the sound source collection device 100, Function can be performed.

In addition, in the present embodiment, the above-described judgment and warning process is described using the network 40. However, in another embodiment of the present invention, a control device such as a mini PC is added to the abnormal sound collector 100, A determination process and an alarm control process for one or more sound sources may be performed in the control device.

2 is a perspective view of an abnormal sound collector 100 according to an embodiment of the present invention. 3 is a plan view of an abnormal sound collector 100 according to an embodiment of the present invention. Hereinafter, an abnormal sound source collection device 100 according to an embodiment of the present invention will be described with reference to FIG. 2 and FIG. The abnormal sound collector 100 according to an exemplary embodiment of the present invention may include a speaker, a plurality of microphones, a microphone housing 110, a speaker housing 120, and a communication unit. The configuration of the abnormal sound source collection device 100 according to an embodiment of the present invention will be described below.

The speaker housing 120 functions as a housing in which a speaker insertion portion is formed, and a speaker can be installed in the speaker insertion portion. That is, when an emergency situation is determined by the server through the speaker installed in the speaker housing 120 as described with reference to FIG. 1, a warning broadcast or the like can be performed through such a speaker. In other words, due to this feature, the attacker may be fooled by recognizing that his / her current action is exposed to the outside, and thus the victim 's personal identity can also be protected.

Further, a lower opening 121 may be further formed in a lower portion of the speaker housing 120. [ Due to the lower opening 121, for example, a cable connected to the speaker can be connected to the outside via the lower opening 121, and the heat generated from the speaker can also be dissipated through the lower opening 121.

As shown in FIG. 2, the microphone housing 110 is installed on one side of the speaker housing 120 and on the other side opposite to the microphone housing 110. In the microphone housing 110, a microphone insertion portion do. As shown in FIG. 2, the microphone housing 110 has a shape in which the cross section gradually decreases from the upper portion to the lower portion.

An upper opening 111 is formed in the inside of the microphone housing 110. In addition, a microphone inserting portion is formed on the lower portion of the microphone housing 110, thereby forming an empty space between the upper portion of the microphone inserting portion and the upper portion of the microphone housing 110. Due to the presence of the empty space and the feature that the cross section of the microphone housing 110 becomes smaller gradually from the upper part to the lower part, the volume can be amplified in the microphone at a short distance to the sound generated from the outside. In addition, the microphone housing 110 may be formed symmetrically with respect to each other.

The microphone housing 110 may also include a first surface of the microphone housing 110 in contact with the speaker housing 120 and a second surface opposite the first surface. Here, the first surface may be formed perpendicular to the upper portion of the speaker housing 120, and the second surface is not perpendicular to the portion extending to the upper portion of the speaker housing 120. That is, the second surface may be formed at an angle inclined by 3 to 7 degrees with respect to the extending portion of the upper portion of the speaker housing 120. That is, the first surface and the second surface are not formed in parallel.

Due to the above-described shape of the microphone housing 110, the distance between the microphones can be virtually further apart. As a result, the detection accuracy with respect to the direction of the sound source can be enhanced as will be described below with reference to FIG.

Further, a through hole (not shown) may be further formed on the lower surface of the microphone housing 110, heat generated from the microphone may be dissipated through the through hole, and a cable, So that the user can escape to the outside.

In addition, the microphone insertion portion may further include an anti-vibration rubber for reducing external vibrations. In addition, a microphone can be formed in such vibration-resisting rubber. As described above, the abnormal sound source collecting device according to an embodiment of the present invention can be installed in a facility, for example, in various devices such as CCTV, electric equipment, . Accordingly, the abnormal sound collector of the present invention can minimize the influence of vibrations generated from the outside through the construction of the anti-vibration rubber. In addition, the anti-vibration rubber may be provided with a communication with the opening of the microphone insertion portion. In addition, the vibration-damping rubber can also perform a function of sealing and blocking the sound from the rear.

The communication unit (not shown) transmits the sound detected through the microphone, that is, the sound source to the server through the network. In addition, when the communication unit receives the warning broadcast signal from the server, the communication unit can issue the warning broadcast to the speaker. That is, through the speaker, warning broadcast corresponding to the abnormal sound source is made, thereby protecting the victim.

As shown in FIG. 3, a connection bracket 130 for connection to the cover may be formed on the speaker housing 120 and the upper portion of the microphone housing 110. In this connection bracket 130, a binding groove may be formed in the cover for connection with the binding member. Here, the binding member may include, for example, bolts and nuts.

4 is a cross-sectional view of an abnormal sound collector according to an embodiment of the present invention. 5 is an enlarged view of a portion A in Fig. As described above, the abnormal sound collector according to an embodiment of the present invention may include a speaker, a microphone, a speaker housing 120, a microphone housing 110, and a communication unit.

Here, the microphone housing 110 may be installed on one side of the speaker housing 120 and on the other side opposite to the one side of the speaker housing 120. In addition, a microphone insertion portion in which a microphone can be installed is formed in the microphone housing 110. In addition, the microphone housing 110 has an empty space for amplifying the volume of sound generated from the outside, and the cross-sectional surface of the microphone housing 110 has a shape gradually decreasing from the upper part to the lower part.

In addition, the microphone housing 110 may include a first side and a second side opposite the first side. Here, the first surface may be formed perpendicular to the upper portion of the speaker housing 120, and the second surface is not perpendicular to the portion extending to the upper portion of the speaker housing 120. That is, the second surface may be formed at an angle inclined by 3 to 7 degrees with respect to the extending portion of the upper portion of the speaker housing 120. That is, the first surface and the second surface are not formed in parallel. That is, as shown in Fig. 4, the distance between the microphones can be further distanced due to the feature that the second side is not parallel to the first side but is formed at a predetermined angle, As a result, the detection range of the sound source can be broadened.

The microphone housing 110 is capable of amplifying and sensing sound in a nearby sound source due to the above structure, and it is easy to distinguish a phase difference between sound sensed by a plurality of microphones with respect to a sound source existing at a remote location . Further, due to the above structure, the microphone housing 110 can be structurally oriented and can be reinforced and less affected by ambient noise. That is, the microphone is installed in an empty space in the microphone housing 110, rather than being mounted on the outside, thereby limiting the direction of the acoustic intake passage. That is, the sound in the direction in which the microphone is installed can be amplified, and the other sound can have the effect of attenuation, so that more accurate direction extraction can be performed on the abnormal sound source.

The microphone housing 110 may be configured to include the anti-vibration rubber 112 to reduce vibration caused by the external environment or on a facility where the abnormal sound collector is installed according to an embodiment of the present invention. Further, as shown in FIG. 5, a microphone 113 may be installed on the anti-vibration rubber 112. The microphone 113 is also connected to the connector 114.

FIG. 6 is a diagram illustrating a sound source position estimation method using an arrival delay time of sound sources collected in the abnormal sound source collection device according to an embodiment of the present invention. As described above, the abnormal sound collector according to an embodiment of the present invention includes a plurality of microphone housings, and at least one microphone can be installed in each of the microphone housings.

In addition, the microphone housing is characterized in that the cross section becomes narrower from the upper part to the lower part of the cross section, and the sound generated in the vicinity of the abnormal sound collecting device can be amplified due to the feature that the hollow space is formed inside. That is, due to the above-mentioned characteristics of the microphone housing, for example, it is possible to distinguish the direction of sound generated from the outside according to the volume of the sound detected by the microphones in the plurality of microphone housings.

On the other hand, when sound generated from a long distance is detected, it is almost impossible to detect the direction using the volume difference between the microphones described above. To this end, in the server according to the embodiment of the present invention, the position of the sound source can be further tracked based on the arrival delay time of a plurality of microphones included in the sound source information collecting device.

As shown in FIG. 6, assume that two microphones exist in the free sound field space. Here, it is assumed that a sound, that is, sound, is generated in an arbitrary direction (?). In the following description, it is assumed that the interval between the two microphones is 17 cm. At this time, an arrival delay time (d) exists between the sound collected by the microphone in the abnormal sound collector according to the embodiment of the present invention. When the arrival delay time (d) is known, the position of the sound source can be determined by the following equation (1).

In Equation (1), c represents the speed of the sound wave in the air, and 2r represents the distance between the two microphones. That is, the speed of sound is 340 m / sec at 25 °, and the distance between the microphones is 17 cm, so that the maximum difference of reaching distance is 500 μm. The phase difference of the sound detected through the two microphones can be calculated using the cross-correlation technique of the two signals. Here, the arrival delay time may be calculated based on the difference between the peak points of the sounds in the frequency domain and the weight function in the frequency domain of the sounds collected from the plurality of microphones.

As shown in FIG. 7, which shows a graph of an example of waveforms of sound sources collected in the abnormal sound collector according to an embodiment of the present invention, a plurality of microphones In this example, have. In FIG. 7, the graph at the top of the figure shows the waveform of the sound detected at the first microphone, and the graph at the bottom of the figure shows the waveform of the sound detected at the second microphone.

When sound is detected in the abnormal sound source collection device, the server applies a cross-correlation technique to the two sound frequencies. In addition, since the description of the cross-correlation technique has been described in detail above, a further description thereof will be omitted. The graph for the waveform applying the cross-correlation technique is shown in FIG. 8, and the graph used for calculating the delay time in the waveform of FIG. 7 is shown in FIG. The server performs a comparison process of the waveform applied with the cross-correlation technique and the data stored in the abnormal sound source storage unit.

As a result of comparison, when the sound source collected by the abnormal sound source collecting device is judged to be an abnormal sound source, that is, a scream of a person, a sound of a horn, a sound of a collision, etc., the server transmits a warning message to a security company so that the dangerous situation can be solved. If the abnormal sound source collection device includes a camera or is linked to a CCTV, the corresponding image can be photographed and further used as a proof image. At the same time, the server can be further used to transmit a warning signal to the abnormal sound source collection device, and to broadcast a warning through a speaker included in the abnormal sound source collection device, so that the dangerous situation can be solved.

As described above, an optimal embodiment has been disclosed in the drawings and specification. Although specific terms have been employed herein, they are used for purposes of illustration only and are not intended to limit the scope of the invention as defined in the claims or the claims. Therefore, those skilled in the art will appreciate that various modifications and equivalent embodiments are possible without departing from the scope of the present invention. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

100: Abnormal sound source collecting device
110: microphone housing 111: upper opening
112: anti-vibration rubber 113: microphone
114: connector 120: speaker housing
130: connection bracket 200: server
1000: Above sound source detection system

Claims (18)

An abnormal sound source collecting device for collecting information about sound generated in the vicinity of a surveillance area,
A speaker housing in which a speaker insertion portion capable of installing a speaker is formed,
A microphone housing provided on one side of the speaker housing and on the other side opposite to the one side and having a microphone insertion portion on which a microphone can be installed;
And a vibration preventing rubber inserted into the microphone inserting part and installed inside the microphone inserting part to reduce external vibration,
And a communication unit for transmitting sound information collected through the microphone to a server. The method according to claim 1,
The microphone housing includes:
And the transverse section gradually becomes smaller from the upper part to the lower part. The method of claim 2,
The microphone housing includes:
A speaker housing having a first surface in contact with the speaker housing and a second surface opposite to the first surface, the top surface and the first surface of the speaker housing being formed to be perpendicular to each other, And the second surface is not perpendicular. The method according to claim 1,
The speaker inserting unit includes:
And a cable of the speaker is opened to be connected. The method according to claim 1,
The microphone-
And a cable of the microphone is opened to be connected. The method of claim 5,
In the anti-vibration rubber,
And a communication hole communicating with the opening of the microphone insertion portion is formed. The method according to claim 1,
Wherein a connection bracket for connection to the cover is formed on the speaker housing and the microphone housing, and a binding groove for connecting the binding member to the cover is formed on the connection bracket. The method according to claim 1,
The microphone housing includes:
Characterized in that the cross section has a circular or polygonal shape. The method according to claim 1,
Wherein a through hole is further formed in the lower portion of the microphone housing and the speaker housing, and heat generated by the speaker and the microphone is dissipated through the through hole. delete The method according to claim 1,
Wherein when the warning broadcast signal is received from the server through the communication unit, the warning broadcast is performed by the speaker. An abnormal sound source detection system for detecting an abnormal sound source by collecting information about sounds generated in the vicinity of a surveillance area,
An abnormal sound source collecting apparatus according to any one of claims 1 to 9 and claim 11; And
And a server for detecting an abnormal sound source based on the sound information collected from the abnormal sound source collection device. The method of claim 12,
The server comprises:
Wherein the position of the sound source is tracked based on an arrival delay time of sounds collected from a plurality of microphones included in the abnormal sound source collection device. 14. The method of claim 13,
The server comprises:
Wherein the location of the sound source is tracked using a cross-correlation technique. 15. The method of claim 14,
The server comprises:
Wherein the weighting function is applied in the frequency domain of the sounds collected from the plurality of microphones and the arrival delay time is calculated based on the difference between the peak points of the sounds in the frequency domain. 15. The method of claim 14,
The server comprises:
Wherein the feature data is extracted from the sounds and the feature data is compared with the abnormal sound source feature data stored in the abnormal sound source storage unit to determine whether or not the sounds correspond to the abnormal sound source, system. 18. The method of claim 16,
Wherein the abnormal sound source characteristic data includes:
Characterized in that the abnormal sound source detection system is characteristic data for an abnormal sound source including at least one of a scream of a person, a sound of a horn for a vehicle, a sudden sound of a vehicle, a broken sound of a windshield, an explosion sound and a vehicle crash sound. 18. The method of claim 16,
The server comprises:
And an input unit for receiving approval from the control personnel,
Characterized in that the sound generating unit generates the sound warning broadcast signal only when the sounds correspond to the abnormal sound source and the approval from the control personnel is made and transmits the generated sound warning sound signal to the abnormal sound source collection apparatus system.

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