KR20130042115A - System for noise masking using sound effect - Google Patents

Abstract

PURPOSE: A noise masking system using sound is provided to make optimized sound corresponding to road traffic noise and surrounding environmental noise by installing directional speakers along a walk adjacent to a noisy road. CONSTITUTION: A noise masking system using sound comprises multiple directional speakers(10) and a control part. The directional speakers are arranged along a path where noise masking is necessary and outputs directional sound to the path. The control part determines the noise level of road traffic noise and surrounding environmental noise and controls the sound level according to the determined noise level.

Description

System for noise masking using sound effect

The present invention relates to a noise masking system using sound, and more particularly, using a sound that can provide a psychological reduction effect of traffic noise to a pedestrian moving a promenade adjacent to a roadside where road traffic noise and ambient noise are induced. Relates to a noise masking system.

Road traffic noise is increasing due to the expansion of the road network due to the rapid increase in the penetration rate of automobiles, the construction of high-speed roads such as urban circulation highways, and the construction of residential complexes near roadsides due to the housing shortage, which is emerging as a major factor that hinders the environment of residential areas. . The best way to cope with this is to reduce the noise generated by the vehicle itself, or to develop a low-noise vehicle or design a road that can reduce the friction between the vehicle and the road, but this method is limited due to economic or technical reasons. There is.

A practical way to solve the road traffic noise is to install a soundproofing facility to block the noise between the roadside and the sound receiving point, the source of noise. That is, a barrier is provided between the noise source and the sound receiving point to reduce sound propagation by diffraction attenuation. This conventional method is a method of passively controlling the road traffic noise, the larger the size of the soundproof wall than the wavelength of the incident wave can be expected more soundproofing effect. However, the installation of a sound barrier can act as a viewing obstacle that infringes the viewing rights of neighboring residents and vehicle passengers.If the sound barrier is damaged or the sound wall structures fall due to the vibration caused by wind or vehicle operation, the vehicle passenger or nearby residents It can be a danger to people. In controlling road traffic noise, this problem becomes a more important obstacle as the size of the sound barrier increases.

On the other hand, recently developed apartment complexes are arranged at right angles to the road as part of the improvement of the noise environment such as road traffic noise and ambient noise, so that the distance from the road can be more than 50m away. Promenades are set up and used as a resting place for residents. By the way, by reducing the distance between the noise source and the masturbation point, the effect of improving the noise environment of the living space can be obtained, but the noise problem of the trail still remains difficult to improve.

The present invention has been made to solve the problems of the prior art as described above, the road traffic noise and the surroundings to the pedestrians moving the promenade by installing a sound system through the directional speaker on the promenade adjacent to the road side where the road traffic noise is induced The object of the present invention is to provide a noise masking system using sound that can provide a psychological reduction effect of environmental noise.

Noise masking system using the sound according to the present invention for achieving the above technical problem, in the noise masking system that can psychologically reduce the road traffic noise and the ambient noise through the sound, a constant along the path that requires noise masking A plurality of directional speakers disposed at intervals and outputting directional sound in the path direction; And determining the noise level of the road traffic noise and the ambient noise so that the road traffic noise and the ambient noise on the path are reduced, and adjusting the sound level according to the determined noise level to output sound through the directional speaker. The control unit; characterized in that it comprises a.

Preferably, the directional speaker is arranged so that the directional sound is output orthogonal to the traveling direction of the path.

Preferably, the directional speaker has an acoustic angle ranging from 90 ° to 120 °.

Preferably, the directional speakers are arranged at intervals where adjacent directional speakers and the range of acoustic angles can overlap each other.

Preferably, the directional speakers may be continuously arranged opposite to each other on both sides of the path with the paths interposed therebetween, or alternately arranged alternately on both sides of the path with the paths therebetween.

Preferably, the directional speaker is disposed continuously on one side of the path, it is arranged so that the directional sound in the direction of the noise source of the road traffic noise and the ambient noise.

Preferably, the device further includes an omnidirectional speaker that outputs omnidirectional sound around the path between adjacent directional speakers.

Preferably, the control unit comprises: a production sound setting means for setting the production sound by the sound, noise level determination means for determining the noise level by measuring the road traffic noise and the surrounding environment noise, and the noise level determination means. Directed sound level control means for controlling the sound level of the produced sound at a predetermined size according to the determined noise level, produced sound output means for outputting the sound of the produced sound through the directional speaker, and produced sound Direct sound DB for storing the sound.

Preferably, the production sound is a natural sound such as a bird sound, a water sound, a wind sound, or music or a song.

Preferably, the directed sound setting means automatically sets the directed sound as a preset sound produced according to the change in the noise level of the road traffic noise and the ambient noise or changes in the surrounding environment such as seasons, times and weather, or an external remote control means. Remotely set the sound produced by.

Preferably, the noise level determining means is connected to the microphone for receiving the road traffic noise and the ambient noise, and determines the noise level by averaging the magnitude of the noise received from the microphone for a predetermined time.

Preferably, the sound production level control means controls the sound level to be within ± 2dB of the noise level.

According to the present invention, a directional speaker is installed at regular intervals along a promenade adjacent to a roadside where road traffic noise is induced, and through this acoustic facility, an optimized production sound can be created in response to road traffic noise and ambient noise. . Through this, it is possible to provide the pedestrians moving the promenade with psychological reduction effect of road traffic noise and ambient noise. In addition, it is possible to prevent the spread of the production sound to the surrounding area other than the trail through the directional speaker.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate preferred embodiments of the invention and, together with the description, And shall not be interpreted.
1 is a view schematically showing a configuration of a noise masking system using sound according to the present invention.
2 is a block diagram showing the configuration of a control unit of a noise masking system using sound according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately It should be interpreted in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined. Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

1 is a view schematically showing the configuration of the noise masking system using the sound according to the present invention, Figure 2 is a block diagram showing the configuration of the control unit of the noise masking system using the sound according to the present invention.

The noise masking system using the sound according to the present invention can psychologically reduce road traffic noise and the surrounding noise around the trail through the sound to the pedestrian moving the promenade adjacent to the roadside where the road traffic noise is induced through the sound. Means sound equipment.

1 and 2, the noise masking system using sound according to the present invention is disposed at regular intervals along a path 1 requiring noise masking, such as a walkway adjacent to a roadside where road traffic noise is induced. A plurality of directional speakers 10 for outputting the directional sound in the direction of the path (1), the noise of the road traffic noise and the ambient noise so that the road traffic noise on the path (1) and the surrounding environment noise can be reduced And a control unit 30 for determining the level, adjusting the sound level according to the determined noise level, and outputting sound through the directional speaker 10.

The directional speaker 10 is a speaker capable of outputting the directional sound in a desired direction, that is, the path 1 direction, and is arranged to output the directional sound perpendicular to the traveling direction of the path 1. At this time, the acoustic angle of the directional speaker 10 preferably has a range of 90 ° ~ 120 °. In addition, in the arrangement of the directional speaker 10, as shown in Figure 1, each directional speaker 10 is arranged at intervals where the range of the acoustic angle and the adjacent directional speaker 10 can overlap each other.

As shown in FIG. 1, the directional speaker 10 may be continuously disposed opposite to each other on both sides of the path 1 with the path 1 interposed therebetween, but the present invention is not limited thereto. The directional speakers 10 may be arranged in succession alternately on both sides of the path 1 with the path 1 interposed therebetween.

Alternatively, the directional speaker 10 may be continuously arranged on only one side of the path 1. In this case, the directional speaker 10 is preferably arranged so that the directional sound can be output in the direction of the noise source of the road traffic noise and the ambient noise.

According to the present invention, in constructing an acoustic facility capable of psychologically reducing road traffic noise and ambient noise through the sound, the directional sound directed toward the path 1 through the directional speaker 10 is included in the path 1. By disposing continuously in the advancing direction, it is possible to form a noise masking zone on the path 1. This can prevent the diffusion of the production sound to the surrounding area other than the path 1, and through the beneficial sound transmission effect of the directional speaker 10 to deliver the sound at the optimal sound level to the pedestrians traveling the path (1). By doing so, it is possible to maximize the effect of noise masking that can psychologically reduce the road traffic noise and the ambient noise through the sound.

On the other hand, in the above-described embodiment has been described as building the acoustic equipment with only the directional speaker 10, the present invention is not limited to this, in addition, the path (1) between the directional speaker 10 adjacent to each other The omnidirectional speaker 20 for outputting omnidirectional sound may be further included. The omnidirectional speaker 20 compensates for the amount of sound transmitted to a portion where the amount of sound transmission is relatively small between adjacent directional speakers 10 such as the area indicated by "A" in FIG. 1. Through this, the sound felt by the pedestrian walking on the path 1 is evenly transmitted, thereby providing a more comfortable sound effect.

The controller 30 determines the noise level of the road traffic noise and the ambient noise so that the road traffic noise and the ambient noise on the path 1 can be reduced, and adjusts the sound level according to the determined noise level. Control to output sound through the speaker (directional speaker 10, non-directional speaker 20).

As shown in FIG. 2, the control unit 30 determines the noise level for determining the noise level by measuring the direction sound setting means 31 for setting the sound produced by the sound and the road traffic noise and the environment noise. Means 32, the sound production level control means 33 for controlling the sound level of the production sound at a predetermined magnitude in accordance with the noise level determined by the noise level determination means 32, and the sound of the production sound. Directing sound output means 34 for outputting through the speaker (10, 20), and directing sound DB 35 for storing the directing sound represented by the sound. Here, the sound produced by the sound is a sound having an α wave of 8 Hz to 13 Hz frequency which is known to give a comfortable feeling to a person. Can be implemented. This directed sound is stored and managed in the directed sound DB 35.

The production sound setting means 31 automatically sets the production sound as the preset production sound according to the change in the noise level of the road traffic noise and the surrounding environment noise or the change of the surrounding environment such as season, time, and weather. For example, at night time, playback of the production sound is stopped. In the morning, the production sound is played with natural sounds such as tranquil bird sounds and water. In the lunch time, the production sound is played with light music or songs. You can select and play the sound produced by the music or song with mood. In addition, according to the season can be played by selecting the sound that is suitable for spring, summer, autumn, winter. In addition, the change in the production sound may be changed to a suitable production sound corresponding to the noise level of the road traffic noise and the ambient noise. However, the present invention is not limited by the reproduction method of the production sound.

Alternatively, the production sound setting means 31 may also set the production sound remotely by an external remote control means. In this case, the manager can selectively play the production sound.

The noise level determination means 32 determines the noise level by measuring the road traffic noise and the ambient noise. To this end, a microphone 40 for receiving the road traffic noise and the ambient noise can be added, and the noise level determining means 32 is connected to the microphone 40, so as to receive the loudness of the sound received from the microphone 40. The noise level is determined by measuring. The method of determining the noise level may determine the noise level by averaging the magnitude of the noise received for a certain time. However, the present invention is not limited by the method for determining the noise level. Here, the noise level refers to the noise of about 60 ~ 65dB as the general road traffic noise and the ambient noise, it is excluded in case of sudden high noise of more than 75dB.

The sound production level control means 33 controls the sound level of the production sound at a predetermined size in accordance with the noise level determined from the sound level determination means 32.

This effect is maximized when the sound level of the production sound is properly adjusted in response to the noise level of the road traffic noise and the ambient noise to psychologically reduce the road traffic noise and the ambient noise by the sound produced by the sound. Because it can. That is, the sound production level control means 33 may control the sound level to be within ± 2dB of the noise level. However, the present invention is not limited to the above-described numerical values, and it is obvious that the reference level (± 2dB) of the noise level may be applied by resetting the noise level according to the noise level of the road traffic noise and the ambient noise.

The directed sound output means 34 outputs the sound of the directed sound through the speakers 10 and 20. The directed sound output means 34 outputs the directed sound to the plurality of speakers 10 and 20 at the same time, or selects the speaker 10 and 20 at the corresponding position in accordance with the presence or movement of a pedestrian. You can output it.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It will be understood that various modifications and changes may be made without departing from the scope of the appended claims.

10: directional speaker 20: omnidirectional speaker
30:

Claims (14)

In the noise masking system that can psychologically reduce road traffic noise and surrounding environment noise through sound,
A plurality of directional speakers disposed at regular intervals along a path requiring noise masking and outputting directional sound in the path direction; And
Determining the noise level of the road traffic noise and the ambient noise so as to reduce the road traffic noise and the ambient noise on the path, and adjusting the sound level according to the determined noise level to output sound through the directional speaker. Noise masking system using the sound, characterized in that it comprises a control unit. The method of claim 1,
The directional speaker is a noise masking system using a sound, characterized in that arranged so that the directional sound is orthogonal to the traveling direction of the path. The method of claim 2,
The directional speaker is a sound masking system using the sound, characterized in that the acoustic angle has a range of 90 ° ~ 120 °. The method of claim 3,
The directional speaker is a noise masking system using the sound, characterized in that the adjacent directional speaker and the acoustic angle range is arranged at intervals that can overlap each other. 5. The method of claim 4,
The directional loudspeaker is a noise masking system using the sound, characterized in that arranged in a continuous direction opposite to each other on both sides of the path. 5. The method of claim 4,
The directional speaker is a sound masking system using the sound, characterized in that arranged in succession alternately on both sides of the path between the path. 5. The method of claim 4,
The directional loudspeaker is a noise masking system using the sound, characterized in that disposed continuously on one side of the path. The method of claim 7, wherein
The directional speaker is a noise masking system using a sound, characterized in that the directional sound is arranged to be output in the direction of the noise source of the road traffic noise and the ambient noise. The method of claim 1,
And a non-directional speaker for outputting omnidirectional sound around the path between adjacent directional speakers. The method of claim 1,
The control unit,
Directed sound setting means for setting the directed sound by the sound;
Noise level determining means for determining the noise level by measuring the road traffic noise and ambient noise;
Directed sound level control means for controlling the sound level of the produced sound at a predetermined magnitude in accordance with the noise level determined by said noise level determining means;
Directed sound output means for outputting the sound of the directed sound through the directional speaker;
Noise masking system using sound, characterized in that it comprises a production sound DB for storing the production sound represented by the sound. The method of claim 10,
The production sound is a noise masking system using a sound, characterized in that the natural sound, such as a bird sound, water sound, wind sound, music or song. The method of claim 10,
The production sound setting means automatically sets the production sound as a preset production sound according to the change in the noise level of the road traffic noise and the surrounding environment noise or the change of the surrounding environment such as seasons, times, and weather, or remotely by an external remote control means. Noise masking system using the sound, characterized in that for setting the direction sound. The method of claim 10,
The noise level determining means is connected to a microphone for receiving the road traffic noise and the ambient noise, and the noise masking system using the sound, characterized in that to determine the noise level by averaging the magnitude of the noise received from the microphone for a predetermined time. . The method of claim 10,
And said sound level control means controls said sound level to be within a range of ± 2 dB of said noise level.

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