KR102518282B1 - Speaker for smart broadcasting system capable of providing same sound pressure, speech intelligibility, and sonic communication in room - Google Patents

Abstract

The present invention provides a speaker for a smart broadcasting system capable of providing the same sound pressure, speech intelligibility, and sonic communication into a room space which comprises: a housing fixedly installed in the center of an indoor ceiling and made of a perforated plate; a mount fixedly installed into the housing and having at least three downward inclined or round-curved surfaces; and a speaker module mounted to enable 360-degree omnidirectional sound output downward on each inclined or curved surface of the mount.

Description

Speaker for smart broadcasting system capable of providing the same sound pressure, voice intelligibility, and sound wave communication in the indoor space

The present invention relates to a speaker for an indoor broadcasting system, and more particularly, provides the same sound pressure, voice intelligibility, and sound wave communication to all listeners in a space, thereby providing an effect of imparting fair sound and information without restrictions to the environment. It relates to a speaker for a smart broadcasting system capable of providing the same sound pressure in a space, voice intelligibility, and sound wave communication.

It is known that there is a close relationship between various acoustic factors in the classroom and academic achievement, and especially in the case of the lower grades, it is known that the transmission of high-clear voice has a great influence on the recognition of learning information.

In addition, according to the 'Listening Assessment Ability Test' system, providing the same voice clarity in the classroom is emerging as a very important factor in the test environment.

In the case of general speakers currently installed in classrooms, there is a sound difference according to space and distance, which causes deviations in sound pressure and voice intelligibility for each listener.

For this reason, the problem of fairness of sound in the 'listening evaluation ability test' is seriously emerging.

In addition, the attendance and absence notification service currently being used by educational institutions checks the attendance of children and students by applying an RFID card or NFC chip to a certain terminal, fingerprint recognition, or inputting a number into the terminal. Therefore, the information on students' departure is managed by monitoring the movement line and sending a message based on the case of deviation. This method is not only inconvenient, but also has various problems, such as additional cost due to the need for a special device.

In addition, most schools prohibit students from bringing their cell phones into the classroom or force them to turn off their cell phones. Despite the recent positive contribution of smartphones that can be used in the class process, they are used collectively. As IT is banned, the use of IT for educational purposes is decreasing, and it is urgent to prepare countermeasures against it, such as going against the trend of the times.

[Prior art literature]

[Patent Literature]

Domestic Patent Registration No. 10-1707751-0000 (2017.02.10)

The present invention has been proposed to solve the above-mentioned problems of the prior art, and its purpose is to provide equal sound pressure, voice intelligibility, and sound wave communication to all listeners in one space, so that fair sound and information can be delivered without restrictions in the environment. It is to provide a speaker for a smart broadcasting system capable of providing the same sound pressure, voice intelligibility, and sound wave communication in an indoor space.

The problem to be solved by the present invention is not limited to those mentioned above, and another problem to be solved that is not mentioned will be clearly understood by those skilled in the art from the description below.

The technical problem of the present invention as described above is achieved by the following means.

(1) A housing made of a perforated board and fixedly installed in the center of the indoor ceiling; a mount fixedly installed in the housing and having at least three or more inclined surfaces or round curved surfaces downward; and a speaker module mounted on each inclined surface or curved surface of the mount so as to output 360-degree omni-directional sound downward.

(2) In the above (1),

The speaker module includes a centrally mounted omni-directional speaker; A speaker for a smart broadcasting system capable of providing the same sound pressure, voice intelligibility, and sound wave communication in an indoor space, further comprising at least one directional speaker unit mounted on one side of the non-directional speaker.

(3) In the above (2),

A speaker for a smart broadcasting system capable of providing the same sound pressure, voice intelligibility, and sound wave communication in an indoor space, characterized in that the directional speaker units are concentrically arranged around the non-directional speaker.

(4) In the above (3),

The directional speaker unit is a speaker for a smart broadcasting system capable of providing the same sound pressure, voice intelligibility, and sound wave communication in an indoor space, characterized in that mounted on a ring-shaped support at regular intervals.

(5) In the above (4),

A speaker for a smart broadcasting system capable of providing the same sound pressure, voice intelligibility, and sound wave communication in an indoor space, characterized in that configured to adjust the irradiation angle of the sound transmitted from the directional speaker unit.

(6) In the above (5),

The irradiation angle is implemented in a stepwise manner so that the central angle in concentric circles can be adjusted in units of 2 to 10 equal parts of the central angle formed between the adjacent directional speaker units. Speakers for smart broadcasting systems that can be provided.

(7) In the above (6),

The ring-shaped support is configured to be rotated in a stepwise manner at a predetermined angle in a clockwise or counterclockwise direction by a motor mounted therein, and is capable of providing the same sound pressure, voice clarity, and sound wave communication in the indoor space. Speakers for broadcasting systems.

(8) In the above (1),

The mount has a polyhedral or hemispherical shape, speaker modules are mounted on each surface, and the surface forming each mount has an upper and lower narrow inclined surface so that the speaker module can transmit sound in all directions toward the lower part of the room. A speaker for a smart broadcasting system capable of providing the same sound pressure, voice intelligibility, and sound wave communication in an indoor space, characterized in that it has.

(9) In the above (8),

The perforated plate is formed over four sides or the entire surface of the housing, and the perforated holes are formed in such a way that a tapered or reverse tapered shape formed at regular intervals on the cross section of the housing is repeated. Speaker for smart broadcasting system capable of providing sound wave communication.

(10) In the above (9),

A speaker for a smart broadcasting system capable of providing the same sound pressure, voice intelligibility, and sound wave communication in an indoor space, characterized in that the lower surface of the sound speaker unit includes a perforated surface.

As described above, according to the present invention, the same sound pressure, voice intelligibility, and sound wave communication are provided to all listeners in a space, so that fair sound and information can be delivered without restrictions to the environment.

1 is a schematic configuration diagram of an indoor smart broadcasting system according to the present invention.
2 is a detailed configuration diagram of a sound speaker unit constituting an indoor smart broadcasting system according to the present invention.
3 is a detailed configuration diagram of an indoor smart broadcasting system according to an embodiment of the present invention.
4 is a block diagram of a configuration according to an embodiment of a broadcast control unit in the present invention.
5 is a block diagram of a configuration according to an embodiment of a mobile terminal constituting the system of the present invention.
6 is a block diagram of a configuration according to another embodiment of a mobile terminal constituting the system of the present invention.
7 shows an embodiment of a frequency band for sound wave communication of the present invention.
8 is a configuration diagram showing an embodiment of a school attendance check system using sound wave communication according to the present invention.
9 is a test result of a directivity pattern measured by the Korea Institute of Electronics Technology for an indoor smart broadcasting system according to an embodiment of the present invention.
10 is a diagram showing a test process of conducting a field test for an indoor smart broadcasting system according to an embodiment of the present invention.
11 is a frequency response measurement analysis result obtained as a result of a field test test [in the figure, "target sample" means a system according to an embodiment of the present invention, and "comparative sample" means an existing system: (11a) frequency, (11b) ) sound pressure, (11c) speech intelligibility]

Advantages and features of the present invention, and methods of achieving them, will become clear with reference to the detailed description of the following embodiments taken in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only these embodiments make the disclosure of the present invention complete, and common knowledge in the art to which the present invention belongs. It is provided to completely inform the person who has the scope of the invention, and the present invention is only defined by the scope of the claims.

Throughout the specification, when a part is said to "comprising" or "including" a certain element, it means that it may further include other elements, not excluding other elements, unless otherwise stated. do. Also, the term "... unit" described in the specification means a unit that processes at least one function or operation. Also, "a or an", "one", "the" and similar related words in the context of describing the invention (particularly in the context of the claims below) Unless indicated or otherwise clearly contradicted by context, both the singular and the plural can be used.

In describing the embodiments of the present invention, if it is determined that a detailed description of a known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted. In addition, terms to be described later are terms defined in consideration of functions in the embodiment of the present invention, which may vary according to the intention or custom of a user or operator. Therefore, the definition should be made based on the contents throughout this specification.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

In the present invention, the interior includes any interior space constituting the interior space of a building, for example, the interior of a regular school classroom or private academy such as a kindergarten, elementary school, middle school, high school, university, and various companies, conference rooms such as government offices or training centers, It is also used as a concept that includes classrooms, etc.

1 is a configuration diagram of an indoor smart broadcasting system according to an embodiment of the present invention, including a broadcast control unit 100 and a sound speaker unit 200. An unexplained reference numeral 300 is a person listening to indoor broadcasting.

In the embodiment of the present invention, the indoor means a partitioned internal space of a building, preferably the building is a school, and the indoor means a classroom.

As shown in FIG. 1, the sound speaker unit 200 according to the present invention is fixedly installed at the center of the indoor ceiling. As shown in FIG. 2 , the sound speaker unit 200 includes a mount 210 to which a speaker module 211 is mounted and a housing 220 covering the mount 210 .

In the present invention, the speaker module includes a speaker and a driving unit (not shown) thereof, and preferably, the speaker is a non-directional speaker. Preferably, the speaker module includes auxiliary speakers 201a and 201b on one side or both sides of the center speaker 201. The center speaker 201 transmits low to mid-bass sounds, and the auxiliary speakers 201a and 201b transmit high sounds to enhance a three-dimensional effect.

The speaker module according to the present invention preferably further includes a directional speaker unit 202, more preferably a super-directional speaker. The directional speaker units 202 are preferably concentrically arranged around the center speaker 201. Preferably, the directional speaker units 202 are mounted on the ring-shaped support 203 at regular intervals. With this configuration, it is possible to adjust the irradiation angle of the sound emitted from the directional speaker unit 202, and preferably, the irradiation angle is 2 to 10 of the central angle formed between the adjacent directional speaker units 202 in a concentric circle. It is implemented in a stepwise manner so that it can be adjusted in equal division units. This makes it possible to adjust in a manner that follows it according to the arrangement or position of the indoor listener 300, which will be described later.

Through the directional speaker unit 202, it is possible to transmit different broadcasts to individual listeners. For example, in the case of an exam, it is possible to transmit different broadcasts to students taking different types of exams, type A and type B, without interfering with nearby students. Therefore, the directional speaker unit 202 is suitable for a case where individual broadcasting is required in addition to content that should be commonly broadcast to all listeners, and can be applied to an attendance check system to be described later.

The ring-shaped support 203 may be rotated clockwise or counterclockwise by a motor (not shown) mounted therein at a predetermined angle in a stepwise manner. Through this, as mentioned above, it is preferable in that it is possible to adjust the irradiation range of the sound wave more minutely with respect to the arrangement position of the listener 300.

The mount 210 has a substantially polyhedron or hemispherical (or round curved surface) shape, and a speaker module is mounted or installed on each surface. The surface forming each mount has an inclined surface in an upper and lower narrow shape so that the speaker module can transmit sound in all directions (360°) toward the lower part of the room.

The housing 220 covers the mount 210 and preferably includes a perforated plate 221 having perforated holes at regular intervals so that sound output is uniformly and effectively spread.

The perforated plate 221 may be formed over four sides or the entire surface of the housing 220, and preferably, the perforated holes are formed in a shape of a taper 220a or a reverse taper 220b formed at regular intervals on the cross section of the housing 220. to be formed in a repeating manner. This configuration is preferable in that it minimizes the change in the frequency characteristics of the speaker and enables sound waves having a uniform magnitude in the space to be transmitted.

In the present invention, the lower surface 204 of the sound speaker unit 200 may be a sealed type, but may preferably be formed as a perforated surface.

The indoor sound broadcasting system according to the present invention includes a broadcast control unit 100, and the broadcast control unit 100 controls sound broadcast transmission to the sound speaker unit 200. Preferably, as shown in FIG. 3, the microphone 400, the display device 500, and the media playback device 600 may be connected through a wired or wireless network to perform predetermined functions.

As shown in FIG. 3, the broadcast control unit 100 of the present invention is connected to the media playback device 600 through a wired or wireless network, and outputs sound through the media playback device 600 to the sound speaker unit. Control the operation of the sound speaker unit 200 to output through the frame (200).

To this end, as shown in FIG. 3, the broadcast control unit 100 includes a data signal receiving unit 110 that receives an output signal of predetermined sound data stored in the media player 600, and transmits the received media data to a predetermined protocol. According to the sound speaker unit 200, a data signal conversion unit 111 for converting a digital signal in a format that can be output, and a data signal transmission unit 112 for converting the signal-converted data into an analog signal and transmitting it to the outside include

As shown in FIG. 3, the broadcast control unit 100 according to the present invention preferably includes a microphone (MC) operation signal receiver 120, a control signal generator 121, and a control signal transmitter 30. do.

The microphone (MC) operation signal receiver 120 receives an operation signal from the microphone 400 .

The control signal generator 121 generates a mute control signal for reducing sound output of the speaker according to the operation signal input to the microphone operation signal receiver 120 .

The control signal transmitter 30 transmits the mute control signal to the sound speaker unit 200 .

Voice input through the microphone 400 is converted into a voice data signal in a predetermined format, and the broadcast control unit 100 receives the voice data signal through the data signal receiver 110.

The received audio data signal is converted into a digital signal in a format that can be output by the sound speaker unit 200 according to a protocol determined through the data signal conversion unit 111 .

The data signal transmission unit 112 converts the signal-converted voice data into an analog signal and transmits it to the sound speaker unit 200.

As shown in FIG. 3, the indoor sound broadcasting system according to the present invention preferably includes a display device 500 displaying an education-related video or image. The display device 500 is connected to the media playback device 600 through a wired or wireless network and displays various audio-visual data provided from the media playback device 600 on a screen.

The microphone 400 according to the present invention has not only a simple voice input function, but also a laser pointing means 410 for irradiating a laser beam on the screen of the display device 500 and a page switching means for switching pages displayed on the screen ( 420).

The laser pointing unit 410 includes a signal input unit 411 and a laser beam irradiation unit 412 . The signal input unit 411 can be implemented in the form of a button on one side of the housing constituting the microphone 400, and when pressure is applied to the button, a laser beam is emitted through the built-in laser beam irradiation unit 412 to the display device 500. are investigated on the screen.

The page switching unit 420 includes a page switching command input unit 421, a page switching signal generating unit 422, and a page switching signal transmission unit 423.

The page switching command input unit 421 inputs a command signal for switching pages displayed on the screen of the display device 500 (eg, moving to the previous page, moving to the back page, moving to the first screen, moving to the last screen, etc.). The page change command input unit 421 can be implemented in the form of a predetermined number of buttons on one side of the housing constituting the microphone 400, and when pressure is applied to each of the buttons, the page change signal generator 422 executes a predetermined command A corresponding page conversion signal is generated to do so.

The page change signal is transmitted to the broadcast control unit 100 through the microphone signal transmission unit 440 . The broadcast controller 100 receives the page change signal through the microphone (MC) operation signal receiver 120 and generates a control signal for page change in the control signal generator 121. The control signal transmission unit 30 transmits the page change control signal to the media player 600 to perform a page change command according to the control signal.

In the present invention, the microphone 400 preferably includes a non-operation signal generator 430.

The non-operation signal generating unit 430 generates a non-operation signal indicating that the microphone 400 is not currently in use. The non-operation signal generating unit 430 is implemented as a sensor (not shown) that detects when the microphone 400 is mounted on a specific holder to maintain a certain angle with the horizontal plane or placed on the floor to be parallel to the horizontal plane. It may be implemented in the form of a switch formed on one side of a housing constituting the microphone 400.

The microphone signal transmission unit 440 transmits the generated non-operation signal to the broadcast control unit 100 . The broadcast control unit 100 receives the non-operation signal through the microphone (MC) operation signal receiving unit 120 and restores the sound output of the muted speaker to its original state through the sound recovery unit 130.

In addition, the indoor sound broadcasting system according to the present invention preferably further includes an access/attendance check means in the broadcast control unit 100 when the building is a school.

4 to 6 are access/attendance checking means according to the present invention, including a lock control signal generator 10, a lock control signal conversion unit 20 at the transmission side, a lock control signal transmitter 30, and a unique identification signal receiver ( 40), a unique identification signal conversion unit 50, and an access/attendance check unit 60.

To this end, the mobile terminal 310 according to the present invention includes a lock control signal receiver 311, a receiving side lock control signal conversion unit 312, a lock execution means 313, and preferably a unique identification signal generator as needed ( 314), a unique identification signal conversion unit 315, and a unique identification signal transmission unit 316.

The locking control signal generator 10 according to the present invention generates a control signal for locking the mobile terminal 310 possessed by the student. Here, the lock means a function that disables normal calls and normal app execution. However, it goes without saying that the communication function for an emergency contact network that can be connected to a person in need of emergency contact from outside, including parents, according to a request by social consensus, can be excluded from the locking function of the present invention.

The lock control signal generated by the lock control signal generator 10 is a signal synchronized with the receiving mobile terminal 310 according to a predetermined protocol, and can be implemented using simple signals such as white noise and chuck.

Preferably, the lock control signal further includes an access/attendance check signal. The access/attendance check signal is transmitted to the mobile terminal 310 to generate a unique identification signal, which is received by the broadcast control unit 100 to check access/attendance.

In the present invention, the transmission-side lock control signal conversion unit 20 converts the digital lock control signal (which may include an access/attendance check signal) generated by the lock control signal generator 10 into an analog format. generate a signal The analog signal may be an encrypted signal.

In the present invention, the lock control signal transmission unit 30 converts the modulated analog signal into a sound wave signal in a band of 22 kHz or less and transmits it. Preferably, a normal voice broadcast in the classroom transmits a sound wave signal of a band of 10 kHz or less, as shown in FIG. 7, and the lock control signal preferably transmits a sound wave signal of a band of 10 kHz to 22 kHz.

The lock control signal transmitted as described above is transmitted to the mobile terminal 310 . Each mobile terminal 310 receives the lock control signal and executes the lock control signal to generate a unique identification signal for locking the mobile terminal or checking attendance.

The lock control signal receiver 311 of the present invention receives the lock control signal transmitted from the broadcast control unit 100 . The lock control signal receiver 311 includes a microphone mounted on the mobile terminal 310 . Therefore, a microphone mounted on a currently commercially available mobile phone or the like can be applied as it is, and the modulated sound wave signal in the band of 10 kHz to 22 kHz can be received by this microphone.

The reception-side lock control signal conversion unit 312 of the present invention converts the analog sound wave signal into a digital signal of a predetermined format that can be executed by an application.

The lock execution means 313 of the present invention configures the application MA, and performs a typical mobile terminal 310 lock function through a predetermined algorithm according to the converted lock control signal.

With the above configuration, the student drives the mobile application (MA) before entering the classroom, and when the broadcast control unit 100 transmits a lock control signal to the classroom space, the mobile terminal 310 receives it through the microphone. As a result, the mobile terminal locking function is executed by the application, and normal use is impossible.

The unique identification signal generation unit 314 of the present invention constitutes the mobile application MA, and generates a unique identification signal of the corresponding mobile terminal 310 through a predetermined algorithm according to the converted attendance check signal. The unique identification signal may include a phone number of the corresponding mobile terminal or information on a combination of unique letters or numbers and symbols arbitrarily generated through an algorithm in addition to the phone number.

For example, the unique identification signal may include QR code data for self-authentication. Preferably, the unique identification signal includes vaccination completion information. The vaccine information completion information preferably includes information about the vaccine, vaccine manufacturer, lot number, inoculation order, inoculation date, inoculation country, and inoculation institution.

The unique identification signal conversion unit 315 of the present invention converts the unique identification number generated as described above into a modulated analog signal in a predetermined format. The analog signal may be an encrypted signal, and may be a sound wave signal or a radio wave signal.

In the present invention, the unique identification signal transmitter 316 converts the modulated analog signal into a sound wave signal in the 10 kHz to 22 kHz band and transmits it as a built-in speaker or a radio wave signal through a radio transmitter installed in the terminal.

The transmitted unique identification signal is received by the unique identification signal receiving unit 40 of the broadcast control unit 100, and is converted into a digital signal through a predetermined signal processing in the unique identification signal conversion unit 50. When the unique identification signal is transmitted as a radio signal, it is transmitted to the management server (teacher's office terminal, etc.) and access/attendance processing is performed through a predetermined process.

The access/attendance check unit 60 analyzes the information included in the unique identification signal, checks the access/exit decision information (entrance time, vaccination status, etc.) of the owner of the mobile terminal, and registers the checked information. The information registered in this way may be stored in a storage device (not shown) of the corresponding broadcast control unit 100 for a certain period of time, and may be transmitted to other external management servers that require this information.

With the above configuration, the student drives the mobile application (MA) before entering or exiting the classroom, and when the broadcast control unit 100 transmits an attendance check signal to the space within the venue, the mobile terminal 310 receives it through a microphone. and mobile locking is performed, and in response to this, a unique identification signal is generated by the application (MA) and transmitted to the broadcast control unit 100 or an external management server to check and manage access.

In addition, the broadcast control unit 100 further includes a positioning signal generator 70 that generates a positioning signal for measuring a separation distance from the mobile terminal 310 .

The location confirmation signal may be a simple check signal composed of a small number of bits, and is generated to receive a response signal from the mobile terminal 310 that has received it.

Like the locking control signal, the positioning signal may be transmitted through the locking control signal converting unit 20 and the locking control signal transmitting unit 30 at the transmission side.

In addition, since unique identification information is included in the response signal, it is possible to confirm from which mobile terminal the corresponding positioning signal was received. The response signal is generated by a separate response signal generator 317 and may be transmitted through a unique identification signal conversion unit 315 and a unique identification signal transmission unit 316.

In the broadcast control unit 100 of the present invention, the unique identification signal receiver 40 receives a response signal from the mobile terminal 310 that has received the positioning signal, and uses the sound wave speed and reception time information to A distance calculation unit 80 that calculates a distance between the broadcast control unit 100 and the mobile terminal 310 is further included.

The broadcast control unit 100 of the present invention further includes a positioning unit 90 that checks the current location of the owner of the mobile terminal 310 according to the calculated distance information.

Preferably, the control signal transmission unit 30 or/and the unique identification signal reception unit 40 are physically separated as shown in FIG. 8 and installed at least two or more, preferably three or more in the classroom. In this case, each positioning signal (s ₁ , s ₂ , s ₃ ) transmitted to each unique identification signal receiver (40a, 40b, 40c) from a specific mobile terminal (310a, 310b, 310c) is received, and the sound wave velocity and reception If the distance is calculated using the time information, the location of the mobile terminal can be accurately determined.

As a result of measurement according to KS C IEC 60268-5:2010, which is a standard for speakers using the system according to the present invention, it can be confirmed that a uniform directivity pattern is shown in all directions, as shown in FIG.

In addition, as a field test in the classroom, in order to divide the environment into 9 points and measure the acoustic test for each point, as shown in FIG. , As a result of the test test by placing the microphone at a height of 1.2 m from the floor to measure the sound and applying the average sitting height, as shown in FIG. In comparison, it can be confirmed that a significantly improved effect is provided.

The above description is merely an example of the technical idea of the present invention, and various modifications and variations can be made to those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be construed according to the claims below, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

100: broadcast control unit
200: sound speaker unit
300: listener

Claims (10)

A housing fixedly installed in the center of an indoor ceiling and made of a perforated board; a mount fixedly installed in the housing and having at least three or more inclined surfaces or round curved surfaces downward; And a speaker module mounted on each inclined surface or curved surface of the mount to enable 360-degree non-directional sound output downward,
A lock control signal is received from a broadcast control unit including a mobile terminal lock control signal generator, a transmission-side lock control signal converter that converts the generated lock control signal into an analog signal, and a control signal transmitter that transmits the generated lock control signal. A speaker for a smart broadcasting system capable of providing the same sound pressure, voice intelligibility, and sound wave communication in an indoor space, characterized in that it receives and performs lock control of a mobile terminal. According to claim 1,
The speaker module includes a centrally mounted omni-directional speaker; A speaker for a smart broadcasting system capable of providing the same sound pressure, voice intelligibility, and sound wave communication in an indoor space, further comprising at least one directional speaker unit mounted on one side of the non-directional speaker. According to claim 2,
A speaker for a smart broadcasting system capable of providing the same sound pressure, voice intelligibility, and sound wave communication in an indoor space, characterized in that the directional speaker units are concentrically arranged around the non-directional speaker. According to claim 3,
The directional speaker unit is a speaker for a smart broadcasting system capable of providing the same sound pressure, voice intelligibility, and sound wave communication in an indoor space, characterized in that mounted on a ring-shaped support at regular intervals. According to claim 4,
A speaker for a smart broadcasting system capable of providing the same sound pressure, voice intelligibility, and sound wave communication in an indoor space, characterized in that configured to adjust the irradiation angle of the sound transmitted from the directional speaker unit. According to claim 5,
The irradiation angle is implemented in a stepwise manner so that the central angle in concentric circles can be adjusted in units of 2 to 10 equal parts of the central angle formed between the adjacent directional speaker units. Speakers for smart broadcasting systems that can be provided. According to claim 6,
The ring-shaped support is configured to be rotated in a stepwise manner at a predetermined angle in a clockwise or counterclockwise direction by a motor mounted therein, and is capable of providing the same sound pressure, voice clarity, and sound wave communication in the indoor space. Speakers for broadcasting systems. According to claim 1,
The mount has a polyhedral or hemispherical shape, speaker modules are mounted on each surface, and the surface forming each mount has an upper and lower narrow inclined surface so that the speaker module can transmit sound in all directions toward the lower part of the room. A speaker for a smart broadcasting system capable of providing the same sound pressure, voice intelligibility, and sound wave communication in an indoor space, characterized in that it has. According to claim 8,
The perforated plate is formed over four sides or the entire surface of the housing, and the perforated holes are formed in such a way that a tapered or reverse tapered shape formed at regular intervals on the cross section of the housing is repeated. Speaker for smart broadcasting system capable of providing sound wave communication.


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