KR20140030011A - Apparatus and method for controlling sound in the outside - Google Patents

Apparatus and method for controlling sound in the outside Download PDF

Info

Publication number
KR20140030011A
KR20140030011A KR1020120146012A KR20120146012A KR20140030011A KR 20140030011 A KR20140030011 A KR 20140030011A KR 1020120146012 A KR1020120146012 A KR 1020120146012A KR 20120146012 A KR20120146012 A KR 20120146012A KR 20140030011 A KR20140030011 A KR 20140030011A
Authority
KR
South Korea
Prior art keywords
sound
arrival space
outside
directivity
space
Prior art date
Application number
KR1020120146012A
Other languages
Korean (ko)
Inventor
서정일
장대영
강경옥
Original Assignee
한국전자통신연구원
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 한국전자통신연구원 filed Critical 한국전자통신연구원
Publication of KR20140030011A publication Critical patent/KR20140030011A/en

Links

Images

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/18—Methods or devices for transmitting, conducting or directing sound
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/10—Applications
    • G10K2210/12—Rooms, e.g. ANC inside a room, office, concert hall or automobile cabin

Abstract

Disclosed herein are an apparatus and a method for controlling sound in the open air. The sound controlling apparatus comprises: a mixer for generating a first sound by mixing audio signals; and a directivity controlling unit for controlling directivity of the first sound to prevent a leak of the first sound to the outside of a sound reaching space. [Reference numerals] (302) Mixer; (303) Directivity control unit; (AA) Microphone 1; (BB) Microphone 2; (CC) Microphone N; (DD) Speaker 1; (EE) Speaker 2; (FF) Speaker M

Description

APPARATUS AND METHOD FOR CONTROLLING SOUND IN THE OUTSIDE

Disclosed are an outdoor sound control apparatus and method. In particular, when providing sound in an outdoor space such as an outdoor performance hall, outdoor event space, park, playground, or in a cultural area of a residential area such as a nightclub, club, karaoke, etc. An apparatus and method for controlling are disclosed.

In general, a high power speaker array system may use a high power vertical speaker array to provide appropriate sound to the seat side in an outdoor space.

The high power speaker array system provides a uniform volume to the front and rear of the seat, but sound may leak out of the seat, such as to the left, right and front and rear of the seat. The leaked sound can then reach a shopping mall or house located around the outdoor venue where the high power speaker array system is located. As a result, the leaked sound may be heard as a noise to a resident of a shopping mall or a house, causing inconvenience to the resident.

Physical structures such as soundproof walls or soundproofing can be used to remove the leaked sound. However, outdoor spaces such as parks and sports grounds where physical structures are not installed, or in the case of non-residential outdoor performance halls, are unable to process the leaked sound.

Accordingly, when providing sound in an outdoor space, a technology capable of controlling sound so that the sound leaking to the outside of the seat does not act as a noise to neighboring residents is required.

The present invention provides a sound control apparatus and method capable of minimizing leakage sound acting as noise by controlling the directivity of the sound emitted from a high-power speaker disposed in an outdoor space.

The present invention provides a sound control apparatus and method for predicting a noise signal of sound leaking to the outside of an outdoor space and removing the noise signal using a virtual soundproof wall.

The present invention provides a sound control apparatus and method that can maintain a constant sound pressure of the sound in the outdoor space to provide the sound by using the indirect sound.

A sound control apparatus according to an embodiment of the present invention, a mixer (Mixer) for mixing the audio signals to produce a first sound, and the directivity of the first sound so that the first sound does not leak outside the sound arrival space It may include a directivity control to control.

The apparatus may further include a sound generator configured to generate a second sound for reducing or removing the first sound outside the sound arrival space.

The sound generator may generate a virtual soundproof wall in the sound arrival space by overlapping or canceling the first sound and the second sound.

In addition, the second sound may be out of phase with the first sound. In this case, the second sound may be radiated toward the outside of the sound arrival space.

The sound generator may analyze the audio signals to predict a noise signal, and generate the second sound using the predicted noise signal.

The directivity controller may analyze the radiation pattern corresponding to the first sound to control the volume of the first sound to be minimum outside the sound arrival space.

The directivity controller may determine the frequency band and the control intensity for controlling the directivity of the first sound based on the number of speakers arranged in the sound generating space where the first sound is output and the structure in which the speakers are arranged. have.

The apparatus may further include an indirect sound generator configured to generate indirect sounds to maintain a constant sound pressure of the first sound in the sound arrival space.

A sound control apparatus according to another embodiment of the present invention, a mixer (Mixer) for mixing the audio signals to produce a first sound, the directivity of the first sound so that the first sound does not leak outside the sound arrival space A directivity control unit, a sound generating unit for generating a second sound for reducing or eliminating the first sound outside the sound arrival space, and an indirect sound pressure of the first sound inside the sound arrival space to be kept constant. It may include an indirect sound generator for generating a sound.

The sound generator may generate a virtual soundproof wall in the sound arrival space by overlapping or canceling the first sound and the second sound.

According to an embodiment of the present invention, a sound control method includes mixing audio signals to generate a first sound, and controlling directivity of the first sound so that the first sound does not leak outside the sound arrival space. It may include.

The method may further include generating a second sound for reducing or eliminating the first sound outside of the sound arrival space.

The method may further include generating an indirect sound to maintain a constant sound pressure of the first sound in the sound arrival space.

According to another aspect of the present invention, there is provided a sound control method comprising: generating a first sound by mixing audio signals, controlling directivity of the first sound so that the first sound does not leak outside the sound arrival space; Generating a second sound for reducing or eliminating the first sound outside of the sound arrival space, and generating an indirect sound such that the sound pressure of the first sound remains constant inside the sound arrival space; It may include.

The sound control apparatus and method according to an embodiment of the present invention can minimize the leakage sound acting as noise by controlling the directivity of the sound emitted from the high-power speaker array disposed in the outdoor space.

In addition, the noise signal of the sound leaking to the outside of the outdoor space can be predicted, and the noise signal can be removed using a virtual soundproof wall.

In addition, the sound pressure of the sound may be kept constant in the outdoor space to provide the sound using the indirect sound.

1 is a view showing the overall configuration of a sound providing system according to an embodiment.
2 is a diagram illustrating a structure in which a sound providing system is installed outdoors.
3 is a block diagram illustrating a detailed configuration of a sound control apparatus according to an exemplary embodiment.
4 is a block diagram showing a detailed configuration of a sound control device according to another embodiment.
5 is a block diagram showing a detailed configuration of a sound control apparatus according to another embodiment.
6 is a flowchart provided to explain a sound control method according to an exemplary embodiment.
7 is a flowchart provided to explain a sound control method according to another exemplary embodiment.
8 is a flowchart provided to explain a sound control method according to another exemplary embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Like reference symbols in the drawings denote like elements. In the present invention, the sound control method can be performed by the sound control device.

Hereinafter, a case in which the sound is controlled when the sound is provided outdoors, such as an outdoor concert hall, an event hall, a playground, etc. will be described.

1 is a view showing the overall configuration of a sound providing system according to an embodiment.

According to FIG. 1, the sound control system 100 may include a plurality of microphones 101, a sound control device 102, a first speaker array 103, and a second speaker array 104.

First, the sound control apparatus 102 may generate a first sound by mixing the audio signals input through the plurality of microphones 101.

The sound control device 102 may control the directivity of the first sound so that the first sound does not leak outside the sound arrival space. In this case, the sound control device 102 may analyze the radiation pattern corresponding to the first sound to control the volume of the first sound to be minimum outside the sound arrival space.

Here, the sound arrival space may include a space within a range to provide sound toward a listener, a viewer, and the like. For example, the sound arrival space may include a space in which the second speaker array 104 is disposed as a space from the outdoor performance hall to the auditorium and the performance viewing area.

Then, the first speaker array 103 may radiate the first sound toward the sound arrival space. In this case, the first speaker array 103 may include a plurality of high output speakers arranged in at least one of a vertical direction and a horizontal direction. For example, the first speaker array 103 may be disposed around the stage and the performer.

The sound control device 102 may generate a second sound by using the first sound. For example, the sound control device 102 may generate a second sound having a phase opposite to that of the first sound.

Then, the second speaker array 104 may radiate the second sound toward the outside of the sound arrival space. Here, the sound generation space may include a space where the first sound is generated. For example, the sound generating space may be a space such as a performer or a stage, and may include a space in which the first speaker arrays are arranged.

For example, as the first sound radiates toward the second speaker array 104 and the second sound radiates toward the first speaker array 103, the first sound and the second sound may overlap or cancel. have. Accordingly, a virtual soundproof wall may be generated in the sound arrival space. For example, a virtual sound barrier may be created at the boundary between the sound arrival space and the outside of the sound arrival space. As a result, the sound control device 102 can reduce or eliminate leakage of the first sound to the outside of the sound arrival space.

In addition, the second speaker array 104 may include a plurality of high power speakers arranged in at least one of a vertical direction and a horizontal direction. For example, the second speaker array 104 may be disposed around an edge of the sound arrival space, such as an auditorium, an outside of a grandstand, and the like.

2 is a diagram illustrating a structure in which a sound providing system is installed outdoors.

According to FIG. 2, the sound control device 201 and the first speaker array 202 may be disposed in the sound generating space 206. For example, the sound control device 201 and the first speaker array 202 may be disposed on the stage.

The sound control device 201 may control the directivity of the first sound reproduced in the auditorium at the performance hall, thereby providing an appropriate volume suitable for the intention of the performer in the performance hall, and minimizing the first sound leaking outside the performance hall.

The second speaker array 203 may be disposed in the sound arrival space 207. For example, the first speaker array 203 may be disposed outside the auditorium or the grandstand.

Subsequently, the virtual sound barrier 205 may be generated as the first sound and the second sound having opposite phases cancel each other around the second speaker array 204. In this case, the sound control device 201 may generate a second sound to remove the first sound leaked to the outside of the performance hall. Then, the second sound radiated from the second speaker array 203 may be canceled from the first sound, so that the first sound may not leak outside the virtual sound barrier 205. In other words, the first sound may not affect noise in residential areas, malls, etc. around the outdoor performance hall.

3 is a block diagram illustrating a detailed configuration of a sound control apparatus according to an exemplary embodiment.

According to FIG. 3, the sound control device 300 may include a mixer 301 and a directivity controller 303.

First, the mixer 302 may generate a first sound by mixing audio signals input through the one or more microphones 301.

For example, the mixer 302 may receive audio signals recorded through one or more microphones 301. The mixer 302 may mix the audio signals to generate a first sound. At this time, the output sound to be reproduced to the audience can be determined by the selection of the sound engineer or the producer. For example, an output volume for which the first sound is to be played back may be determined.

The directivity control unit 303 may control the directivity of the first sound so that the first sound does not leak outside the sound arrival space.

In one example, the directivity control unit 303 may control the overlapping and cancellation of the first sound by analyzing the structural characteristics of the first speaker array and the radiation pattern corresponding to the first sound. As such, the directivity of the first sound may be controlled by controlling the superposition and cancellation of the first sound. For example, the directivity controller 303 may control the directivity of the first sound by dividing the region corresponding to the determined output volume from the region in which the output volume is reduced in the first sound. In addition, the directivity control unit 303 may provide the volume of the first sound to the sound arrival space such as an auditorium as an output volume, and provide the minimum volume of the first sound outside and outside the sound arrival space.

In this case, the directivity controller 303 may determine the frequency band and the control intensity for controlling the directivity of the first sound based on the number of speakers arranged in the sound generating space in which the first sound is output and the structure in which the speakers are arranged. . Here, the control strength may include a ratio between the output volume and the minimum volume. The number of speakers may be set in advance, and the directivity control unit 303 may receive the arrangement structure of the speakers from each speaker included in the first speaker array 304.

Then, the first speaker array 304 may radiate the first sound whose directivity is controlled toward the sound arrival space of the seat or the like. In this case, the first speaker array 304 may be disposed in at least one of a vertical direction and a horizontal direction. In addition, the first speaker array 304 may be configured in various combinations to control the directivity of the first sound. For example, the first speaker array 304 may be arranged in various directions such that the first sound is reproduced at an output volume in the sound arrival space and does not leak to the outside of the sound arrival space.

In FIG. 3, the technology for controlling the directivity of the first sound has been described by the sound control device 300, which corresponds to an embodiment, and the sound control device 300 uses an indirect sound in the sound arrival space. The sound pressure of the first sound may be kept constant.

For example, the sound control device 300 may further include an indirect sound generator (not shown). Then, the indirect sound generator may receive the first sound generated by the mixer 302 and generate indirect sounds corresponding to the sound field characteristics of the indoor performance hall. For example, the indirect sound may include reflected sound and reverberation sound, and may be indirect sound to which a sound field characteristic of a preset indoor concert hall is applied. In this case, the indirect sound may be radiated through dedicated speakers. Then, even if the gain of the main speaker among the dedicated speakers is reduced, the sound pressure of the first sound can be kept constant inside the sound arrival space.

4 is a block diagram showing a detailed configuration of a sound control device according to another embodiment.

According to FIG. 4, the sound control device 400 may include a mixer 402, a directivity controller 403, and a sound generator 404. In FIG. 4, since the operations of the mixer 402 and the directivity control unit 403 are substantially the same as the operations of the mixer 302 and the directivity control unit 303 of FIG. 3, redundant descriptions thereof will be omitted.

First, the mixer 402 may generate a first sound by mixing audio signals input through the one or more microphones 401.

The directivity control unit 403 may receive the first sound from the mixer 402 and control the directivity of the first sound so that the received first sound does not leak outside the sound arrival space.

In this case, the directivity control unit 403 may control the directivity of the first sound by controlling the superposition and cancellation of the first sound based on the structural characteristics of the first speaker array and the radiation pattern corresponding to the first sound. For example, the directivity control unit 403 may control the directivity of the first sound such that the volume of the first sound is minimized outside or outside the sound arrival space.

Then, the first speaker array 405 may radiate the directivity-controlled first sound into the sound arrival space.

The sound generator 404 may generate a second sound for reducing or removing the first sound outside the sound arrival space. In this case, the sound generator 404 may generate a second sound that is out of phase with the first sound.

For example, the sound generator 404 may predict the noise signal by analyzing the audio signals input through the plurality of microphones 401. For example, the noise signal may include a signal predicted to leak out of the sound arrival space. Subsequently, the sound generator 404 generates the second sound using the predicted noise signal, the first sound received from the mixer 402, and the first sound whose directivity is output from the first speaker array 405. Can be generated.

The second speaker array 406 can then radiate the second sound towards the outside of the sound arrival space. For example, the second speaker array 406 may radiate the second sound toward the outside of the virtual sound barrier. As a result, a virtual sound barrier may be generated outside the sound arrival space. As such, as the first sound and the second sound overlap or cancel each other in the virtual sound barrier, the first sound may not leak out of the sound arrival space. In other words, the second sound may remove the first sound outside the sound arrival space so that the first sound does not leak outside the sound arrival space.

5 is a block diagram showing a detailed configuration of a sound control apparatus according to another embodiment.

According to FIG. 5, the sound control apparatus 500 may include a mixer 502, a directivity controller 503, a sound generator 504, and an indirect sound generator 505. In FIG. 5, the operations of the mixer 502, the directional controller 503, and the sound generator 504 are substantially the same as those of the mixer 402, the directional controller 403, and the sound generator 404 of FIG. 4. Since the description is the same, duplicate descriptions will be omitted.

First, the mixer 502 may generate a first sound by mixing audio signals input through the one or more microphones 501.

The directivity control unit 503 may receive the first sound from the mixer 502 and control the directivity of the first sound so that the received first sound does not leak outside the sound arrival space.

The first speaker array 506 can then radiate the directivity controlled first sound into the sound arrival space.

The sound generator 504 may generate a second sound for reducing or removing the first sound outside the sound arrival space. In this case, the sound generator 504 may generate a second sound that is out of phase with the first sound.

Then, the second speaker array 507 may radiate the second sound toward the outside of the sound arrival space. For example, the second speaker array 507 may radiate the second sound toward the outside of the virtual sound barrier. As a result, a virtual sound barrier may be generated outside the sound arrival space.

The indirect sound generator 505 may receive the first sound generated by the mixer 502 and generate indirect sounds corresponding to the sound field characteristics of the indoor performance hall. Here, the indirect sound may include a reflected sound and a reverberation sound. The indirect sound may be an indirect sound to which a sound field characteristic of a preset indoor concert hall is applied.

In this case, the indirect sound may be emitted through the second speaker array 507 or dedicated speakers for exclusively radiating the indirect sound.

For example, when using dedicated speakers, as the dedicated speakers radiate indirect sound toward the sound arrival space, the sound pressure of the first sound can be kept constant inside the sound arrival space.

In addition, when the second speaker array 507 is used, the second speaker array 507 may radiate a second sound for forming a virtual sound barrier to the outside of the sound arrival space. The second speaker array 507 may radiate indirect sound toward the sound generating space. In other words, the indirect sound may be radiated by using a two-row speaker array in which the radiation directions are reversed to radiate into the sound arrival space, or by using a speaker array system that adjusts the sound radiation directivity by signal.

Then, even if the gain of the main speaker among the second speaker array 507 or the dedicated speakers is reduced, the sound pressure of the first sound can be kept constant within the sound arrival space.

6 is a flowchart provided to explain a sound control method according to an exemplary embodiment.

The sound control method of FIG. 6 may be performed by the sound control device of FIG. 3.

First, in operation 601, the sound control device may generate a first sound.

For example, the sound control apparatus may generate the first sound by mixing the audio signal input through the plurality of microphones. At this time, the output sound to be reproduced to the audience can be determined by the selection of the sound engineer or the producer. For example, an output volume for which the first sound is to be played back may be determined.

In operation 602, the sound control device may control the directivity of the first sound.

In this case, the sound control device may control the directivity of the first sound so that the first sound does not leak outside the sound arrival space.

In one example, the sound control device may control the superposition and cancellation of the first sound by analyzing the structural characteristics of the first speaker array and the radiation pattern corresponding to the first sound. As such, the directivity of the first sound may be controlled by controlling the superposition and cancellation of the first sound.

For example, the sound control apparatus may control the directivity of the first sound by distinguishing an area corresponding to an output volume determined by the sound engineer or the producer from the first sound and an area in which the output volume is reduced. As such, when the directivity of the first sound is controlled by dividing the regions, the volume of the first sound is reproduced at the output volume in the sound arrival space, and the volume of the first sound can be minimized outside and outside the sound arrival space. have.

In this case, the sound control apparatus may determine the frequency band and the control intensity for controlling the directivity of the first sound based on the number of speakers arranged in the sound generating space in which the first sound is output and the structure in which the speakers are arranged. Here, the control strength may include a ratio between the output volume and the minimum volume. The number of speakers may be set in advance, and the sound control apparatus may receive an arrangement structure of the speakers from each of the speakers included in the first speaker array.

Then, the first speaker array may emit the first sound whose directivity is controlled toward the sound arrival space of the seat or the like. In this case, the first speaker array may be disposed in at least one of a vertical direction and a horizontal direction. In addition, the first speaker array may be configured in various combinations to control the directivity of the first sound. For example, the first speaker array may be arranged in various directions such that the first sound is reproduced at an output volume in the sound arrival space and does not leak outside of the sound arrival space.

In FIG. 6, the operation of controlling the directivity of the first sound has been described, but the sound control device may generate indirect sound so that the sound pressure of the first sound is kept constant in the sound arrival space.

7 is a flowchart provided to explain a sound control method according to another exemplary embodiment.

The sound control method of FIG. 7 may be performed by the sound control device of FIG. 4.

First, in operation 701, the sound control device may generate a first sound.

For example, the sound control apparatus may generate the first sound by mixing the audio signal input through the plurality of microphones. At this time, the output sound to be reproduced to the audience can be determined by the selection of the sound engineer or the producer. For example, an output volume for which the first sound is to be played back may be determined.

In operation 702, the sound control device may control the directivity of the first sound.

In this case, the sound control device may control the directivity of the first sound so that the first sound does not leak outside the sound arrival space.

In one example, the sound control device may control the superposition and cancellation of the first sound by analyzing the structural characteristics of the first speaker array and the radiation pattern corresponding to the first sound. As such, the directivity of the first sound may be controlled by controlling the superposition and cancellation of the first sound. Here, the information including the structural characteristics of the first speaker array may be received from each speaker of the first speaker array.

Then, the first speaker array may emit the first sound whose directivity is controlled toward the sound arrival space of the seat or the like. In this case, the first speaker array may be disposed in at least one of a vertical direction and a horizontal direction. In addition, the first speaker array may be configured in various combinations to control the directivity of the first sound. For example, the first speaker array may be arranged in various directions such that the first sound is reproduced at an output volume in the sound arrival space and does not leak outside of the sound arrival space.

In operation 703, the sound control apparatus may generate a second sound using the first sound. In this case, the sound control device may generate a second sound for reducing or removing the first sound outside the sound arrival space. For example, the sound control device may generate a second sound that is out of phase with the first sound.

In one example, the sound control device may analyze the audio signals input through the plurality of microphones to predict the noise signal. For example, the noise signal may include a signal predicted to leak out of the sound arrival space. Subsequently, the sound control apparatus may generate the second sound using the predicted noise signal, the first sound output from the mixer, and the first sound whose directivity is output from the first speaker array.

The second speaker array can then radiate the second sound towards the outside of the sound arrival space. For example, the second speaker array may radiate the second sound toward the outside of the virtual sound barrier.

Thus, in operation 704, the sound control device may generate a virtual sound barrier outside the sound arrival space. As such, as the first sound and the second sound overlap or cancel each other in the virtual sound barrier, the first sound may not leak out of the sound arrival space. In other words, the second sound may remove the first sound outside the sound arrival space so that the first sound does not leak outside the sound arrival space.

In FIG. 7, the operation of controlling the directivity of the first sound and removing the first sound leaked to the outside of the sound arrival space by using the second sound has been described. In addition, the sound control device includes a sound arrival space. The indirect sound may be generated so that the sound pressure of the first sound is kept constant within.

8 is a flowchart provided to explain a sound control method according to another exemplary embodiment.

The sound control method of FIG. 8 may be performed by the sound control device of FIG. 5.

First, in step 801, the sound control device may generate the first sound.

For example, the sound control apparatus may generate the first sound by mixing the audio signal input through the plurality of microphones. At this time, the output sound to be reproduced to the audience can be determined by the selection of the sound engineer or the producer. For example, an output volume for which the first sound is to be played back may be determined.

In operation 802, the sound control device may control the directivity of the first sound.

In this case, the sound control device may control the directivity of the first sound so that the first sound does not leak outside the sound arrival space.

In one example, the sound control device may control the superposition and cancellation of the first sound by analyzing the structural characteristics of the first speaker array and the radiation pattern corresponding to the first sound. As such, the directivity of the first sound may be controlled by controlling the superposition and cancellation of the first sound. Here, the information including the structural characteristics of the first speaker array may be received from each speaker of the first speaker array.

Then, the first speaker array may emit the first sound whose directivity is controlled toward the sound arrival space of the seat or the like. In this case, the first speaker array may be disposed in at least one of a vertical direction and a horizontal direction. In addition, the first speaker array may be configured in various combinations to control the directivity of the first sound. For example, the first speaker array may be arranged in various directions such that the first sound is reproduced at an output volume in the sound arrival space and does not leak outside of the sound arrival space.

In operation 803, the sound control apparatus may generate a second sound using the first sound. In this case, the sound control device may generate a second sound for reducing or removing the first sound outside the sound arrival space. For example, the sound control device may generate a second sound that is out of phase with the first sound. The second speaker array can then radiate the second sound towards the outside of the sound arrival space. For example, the second speaker array may radiate the second sound toward the outside of the virtual sound barrier.

As such, as the second sound is radiated, in operation 804, the sound control apparatus may generate a virtual sound barrier outside the sound arrival space. For example, the first sound and the second sound may overlap or cancel in the virtual sound barrier. Accordingly, the first sound may not leak outside the sound arrival space. In other words, the second sound may remove the first sound outside the sound arrival space so that the first sound does not leak outside the sound arrival space.

In operation 805, the sound control device may generate an indirect sound.

For example, the sound control apparatus may receive the first sound generated by the mixer and generate indirect sounds corresponding to the sound field characteristics of the indoor performance hall. Here, the indirect sound may include a reflected sound and a reverberation sound. The indirect sound may be an indirect sound to which a sound field characteristic of a preset indoor concert hall is applied.

In this case, the indirect sound may be emitted through the second speaker array or the dedicated speakers for exclusively radiating the indirect sound. For example, the dedicated speakers or the second speaker array may emit indirect sound toward the sound generating space. Then, even if the gain of the main speaker among the second speaker array or the dedicated speakers is reduced, the sound pressure of the first sound can be kept constant inside the sound arrival space.

9 is a block diagram showing a detailed configuration of a sound control apparatus according to another embodiment.

The sound control apparatus 900 of FIG. 9 may have a structure in which the directivity control unit 403 is omitted from the sound control apparatus 400 of FIG. 4. Accordingly, description overlapping with the components of the sound control apparatus of FIG. 4 among the components of the sound control apparatus of FIG. 9 will be omitted.

According to FIG. 9, the sound control apparatus 900 may include a mixer 902 and a sound generator 903.

First, the mixer 902 may generate a first sound by mixing audio signals input through the one or more microphones 901.

Then, the first speaker array 904 may radiate the first sound input from the mixer 902 into the sound arrival space. For example, the first speaker array 904 may radiate the first sound toward the audience.

The sound generator 903 may generate a second sound for reducing or removing the first sound outside the sound arrival space. In this case, the sound generator 903 may generate a second sound that is out of phase with the first sound.

For example, the sound generator 903 may predict a noise signal by analyzing audio signals input through the plurality of microphones 901. For example, the noise signal may include a signal predicted to leak out of the sound arrival space. Subsequently, the sound generator 903 may generate a second sound using the predicted noise signal and the first sound received from the mixer 902.

Then, the second speaker array 905 may radiate the second sound toward the outside of the sound arrival space. For example, the second speaker array 905 may radiate the second sound toward the outside of the virtual sound barrier. As a result, a virtual sound barrier may be generated outside the sound arrival space. As such, as the first sound and the second sound overlap or cancel each other in the virtual sound barrier, the first sound may not leak out of the sound arrival space. In other words, the second sound may remove the first sound outside the sound arrival space so that the first sound does not leak outside the sound arrival space.

FIG. 10 is a flowchart provided to explain a sound control method performed by the sound control apparatus of FIG. 9.

First, in operation 1001, the sound control device may generate a first sound.

For example, the sound control apparatus may generate the first sound by mixing the audio signal input through the plurality of microphones. At this time, the output sound to be reproduced to the audience can be determined by the selection of the sound engineer or the producer. For example, an output volume for which the first sound is to be played back may be determined.

Then, the first speaker array may radiate the first sound toward the sound arrival space of the seat or the like. In this case, the first speaker array may be disposed in at least one of a vertical direction and a horizontal direction. In addition, the first speaker array may be configured in various combinations to control the directivity of the first sound. For example, the first speaker array may be arranged in various directions such that the first sound is reproduced at an output volume in the sound arrival space and does not leak outside of the sound arrival space.

In operation 1003, the sound control device may generate a second sound using the first sound. In this case, the sound control device may generate a second sound for reducing or removing the first sound outside the sound arrival space. For example, the sound control device may generate a second sound that is out of phase with the first sound.

In one example, the sound control device may analyze the audio signals input through the plurality of microphones to predict the noise signal. For example, the noise signal may include a signal predicted to leak out of the sound arrival space. Subsequently, the sound control device may generate a second sound using the predicted noise signal and the first sound output from the mixer.

The second speaker array can then radiate the second sound towards the outside of the sound arrival space. For example, the second speaker array may radiate the second sound toward the outside of the virtual sound barrier.

Thus, in operation 1003, the sound control device may generate a virtual sound barrier outside the sound arrival space. As such, as the first sound and the second sound overlap or cancel each other in the virtual sound barrier, the first sound may not leak out of the sound arrival space. In other words, the second sound may remove the first sound outside the sound arrival space so that the first sound does not leak outside the sound arrival space.

In FIG. 9 and FIG. 10, the operation of removing the first sound leaking to the outside of the sound arrival space using the second sound has been described. In addition, the sound control device may be configured to control the first sound in the sound arrival space. It is also possible to generate indirect sounds so that the sound pressure remains constant.

As described above, the present invention has been described by way of limited embodiments and drawings, but the present invention is not limited to the above embodiments, and those skilled in the art to which the present invention pertains various modifications and variations from such descriptions. This is possible.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined by the equivalents of the claims, as well as the claims.

300: sound control device
301: a plurality of microphones
302: mixer
303: directivity control
304: first speaker array

Claims (24)

A mixer for mixing the audio signals to produce a first sound; And
Directional control unit for controlling the directivity of the first sound so that the first sound does not leak outside the sound arrival space
Sound control device comprising a. The method of claim 1,
A sound generator for generating a second sound for reducing or eliminating the first sound outside the sound arrival space.
Sound control device further comprising. 3. The method of claim 2,
The sound generator,
And generating a virtual soundproof wall in the sound arrival space by overlapping or canceling the first sound and the second sound. 3. The method of claim 2,
The second sound is,
The sound control device, characterized in that the phase is opposite to the first sound, and radiated toward the outside of the sound arrival space. 3. The method of claim 2,
The sound generator,
And analyzing the audio signals to predict a noise signal and to generate the second sound using the predicted noise signal. The method of claim 1,
Wherein the directivity control unit comprises:
And analyzing the radiation pattern corresponding to the first sound to control the volume of the first sound to be minimum outside the sound arrival space. The method of claim 1,
Wherein the directivity control unit comprises:
A sound control apparatus for determining a frequency band and a control intensity for controlling the directivity of the first sound based on the number of speakers arranged in the sound generating space where the first sound is output and the structure in which the speakers are arranged. . The method of claim 1,
An indirect sound generator configured to generate an indirect sound to maintain a constant sound pressure of the first sound in the sound arrival space;
Sound control device further comprising. A mixer for mixing the audio signals to produce a first sound;
A directivity control unit controlling the directivity of the first sound so that the first sound does not leak outside the sound arrival space;
A sound generator configured to generate a second sound for reducing or eliminating the first sound outside the sound arrival space; And
An indirect sound generator configured to generate an indirect sound to maintain a constant sound pressure of the first sound in the sound arrival space;
Sound control device comprising a. 10. The method of claim 9,
The sound generator,
And generating a virtual soundproof wall in the sound arrival space by overlapping or canceling the first sound and the second sound. Mixing the audio signals to produce a first sound; And
Controlling the directivity of the first sound so that the first sound does not leak outside the sound arrival space;
Sound control method comprising a. 12. The method of claim 11,
Generating a second sound to reduce or eliminate the first sound outside of the sound arrival space;
Sound control method further comprising. The method of claim 12,
Generating the second sound,
And generating a virtual soundproof wall in the sound arrival space by overlapping or canceling the first sound and the second sound. The method of claim 12,
The second sound is,
The sound control method, characterized in that the phase is opposite to the first sound, and is emitted toward the outside of the sound arrival space. The method of claim 12,
Generating the second sound,
And analyzing the audio signals to predict a noise signal and to generate the second sound using the predicted noise signal. 12. The method of claim 11,
Controlling the directivity of the first sound,
And analyzing the radiation pattern corresponding to the first sound to control the volume of the first sound to be minimized outside the sound arrival space. 12. The method of claim 11,
Controlling the directivity of the first sound,
The sound control method according to claim 1, wherein the frequency band and the control intensity for controlling the directivity of the first sound are determined based on the number of speakers arranged in the sound generating space where the first sound is output and the structure in which the speakers are arranged. . 12. The method of claim 11,
Generating an indirect sound so that a sound pressure of a first sound is maintained within the sound arrival space;
Sound control method further comprising. Mixing the audio signals to produce a first sound;
Controlling the directivity of the first sound so that the first sound does not leak outside the sound arrival space;
Generating a second sound for reducing or eliminating the first sound outside of the sound arrival space; And
Generating an indirect sound so that a sound pressure of a first sound is maintained within the sound arrival space;
Sound control method comprising a. 20. The method of claim 19,
Generating the second sound,
And generating a virtual soundproof wall in the sound arrival space by overlapping or canceling the first sound and the second sound. A mixer for mixing the audio signals to produce a first sound; And
A sound generator for generating a second sound for reducing or eliminating the first sound outside the sound arrival space.
Sound control device comprising a. 22. The method of claim 21,
The sound generator,
And generating a virtual soundproof wall in the sound arrival space by overlapping or canceling the first sound and the second sound. The method of claim 22,
The virtual sound barrier,
And the second sound is generated as it is radiated toward the outside of the sound arrival space. 22. The method of claim 21,
The sound generator,
An indirect sound generator configured to generate an indirect sound to maintain a constant sound pressure of the first sound in the sound arrival space;
Sound control device further comprising.
KR1020120146012A 2012-08-29 2012-12-14 Apparatus and method for controlling sound in the outside KR20140030011A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020120094891 2012-08-29
KR20120094891 2012-08-29

Publications (1)

Publication Number Publication Date
KR20140030011A true KR20140030011A (en) 2014-03-11

Family

ID=50642771

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020120146012A KR20140030011A (en) 2012-08-29 2012-12-14 Apparatus and method for controlling sound in the outside

Country Status (1)

Country Link
KR (1) KR20140030011A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180108766A (en) * 2016-02-02 2018-10-04 디티에스, 인코포레이티드 Rendering an augmented reality headphone environment
KR20190125046A (en) * 2018-04-27 2019-11-06 광주과학기술원 Noise reduction system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180108766A (en) * 2016-02-02 2018-10-04 디티에스, 인코포레이티드 Rendering an augmented reality headphone environment
KR20190125046A (en) * 2018-04-27 2019-11-06 광주과학기술원 Noise reduction system

Similar Documents

Publication Publication Date Title
KR102078605B1 (en) Spatial audio rendering for beamforming loudspeaker array
EP2708043B1 (en) Method for efficient sound field control of a compact loudspeaker array
JPH11504176A (en) Acoustic audio system for generating three-dimensional sound images
JP2010213031A (en) Speaker array apparatus
CN110073675A (en) Audio tweeter with the upward sounding driver of full range for reflecting audio projection
JP2005287002A (en) Stereophonic acoustic reproducing system and stereophonic acoustic reproducing apparatus
US8483395B2 (en) Sound field reproduction apparatus and method for reproducing reflections
KR20140030011A (en) Apparatus and method for controlling sound in the outside
US20060251271A1 (en) Ceiling Mounted Loudspeaker System
CN103139687B (en) Based on the audio frequency special efficacy device of parametric acoustic array acoustic beam reflection
KR102081957B1 (en) Horizontal array type apparatus for reproducing sound using wave field sysntesis technology
Corteel et al. Spatial sound reinforcement using Wave Field Synthesis. A case study at the Institut du Monde Arabe
US20210297772A1 (en) Sound diffusion device with fixed non-constant curvature
KR102079700B1 (en) Horizontal array type system for reproducing sound using wave field sysntesis technology
JP2011215187A (en) Sound reproduction device
JP2009092682A (en) Sound field control device and system
El-Saghir Deployment of Two-Dimensional Loudspeaker Arrays in Worship Spaces-New Application Concepts and a Real-World Case Study
Hoover et al. Electronically variable room acoustics-motivations and challenges
JP2019530312A (en) Stereo development technology
KR102132889B1 (en) Acoustic control system for horizontal array type sound reproducing apparatus using wave field synthesis technology
Ahnert System Design Approaches
US20220329943A1 (en) Adaptive structured rendering of audio channels
Ronan et al. Configuring SpADE: practical considerations influencing the design of a three-dimensional multi-channel listening environment
Mapp Sound reinforcement and public address
JP5897500B2 (en) Speaker array device and output control method for speaker array device

Legal Events

Date Code Title Description
E902 Notification of reason for refusal
E601 Decision to refuse application
E601 Decision to refuse application
E801 Decision on dismissal of amendment