[Audio Network Information]
Not all renovations are done according to design requirements. In the later work, some dealers consulted us. Their current decoration has changed, some have changed heights, and some have changed the scope of sound reinforcement. How to adjust the installation angle of the linear array sound system to meet the existing sound reinforcement range? According to the dealer's problem, it is necessary to provide a sound system after the installation is completed. The directivity of the sound system does not need to change the installation mode of the linear array sound system to change the directivity of the sound system to meet the requirements of the sound reinforcement coverage. product.
The formation and requirements of directivity <br> Any sound source has a certain directivity in a certain frequency range, and also the directivity of any speaker system. The directivity is due to the mutual interference of sound waves, and the directivity to the speaker The system is good and bad. Why do we use a linear array sound system for sound reinforcement? The main purpose is to make full use of the linear array sound system to produce lower frequency directivity. The principle of the speaker system itself, the structural shape, and the transmission characteristics of the sound wave determine the size of the directivity. Since the principle and the acoustic characteristics cannot be changed, people now change the shape structure to achieve the change of directivity!
Why does the linear array sound system have a high sound pressure level and a long transmission distance? The main reason is that the linear array sound system controls the directivity of the high, medium and low frequency bands (how to control the directivity is the key to the linear array sound system), and controlling the directivity is to control the sound pressure level and control the sound. The pressure level controls the attenuation characteristics and the transmission distance. The relationship between the directivity characteristics of the sound source and the sound pressure level is shown in Figure 1. From the figure we can see that when the directivity changes from 360 to 45 degrees, the sound pressure level increases by 6 dB, and for the sound reinforcement distance, the distance increases by a factor of two. This is why you want to control directionality.
Figure 1 The relationship between directivity and sound pressure level
For an ordinary speaker system, the axis of its directivity is shown in Figure 2. It is characterized by a vertical relationship between the directional axis and the speaker. The directivity greater than the structural size of the speaker system is a 360 degree circle (lower frequency). If you want to adjust the directivity angle of the speaker system, you need to adjust the axis direction of the speaker, so it is more complicated. Especially for linear array sound systems, it is more complicated. In this way, in the current linear array sound system, there are arc arrays, J-shaped arrays and many other installation forms, in order to meet the requirements of directivity. The installation of several linear array sound systems is shown in Figure 3.
Figure 2 directionality diagram of the speaker
Figure 3 How to install several linear array speaker systems
It can be seen from Fig. 3 that in order to change the directivity of the linear array sound system, it is necessary to change the structure of the speaker. For different coverage areas, it is necessary to adjust the structural form frequently to meet the requirements of different coverage areas. The use of adjustment is very complicated, which is why the linear array sound system has a limited range of applications. To solve this problem, we have developed a linear array sound system with adjustable directivity.
How can we change the directivity <br> The formation of directivity is due to the interference of sound waves, then if we can control the interference form of sound waves, then we can not control the directivity? From the formation of the directivity of the linear array sound system in Figure 3, we can see that the linearity of the linear array sound system when it is in the vertical state is perpendicular to the array. When the linear array sound system is in other states, the directivity The axis deviates from the horizontal state, and there is a directivity at an angle to the ground.
Figure 3 How to install several linear array speaker systems
Therefore, to change the directivity angle of the speaker system, it is necessary to change the axis offset angle of the speaker system. See Figure 4 (the relationship between the directivity angle of the linear array speaker system and the system axis angle). From the angle of the offset, we can see the linear array. The speaker system has a positional offset after accumulating from above to below the speaker system. The offset of this position is the positional movement of the sound image (delay distance). According to this phenomenon, we can gradually delay the sound of the single speaker system without changing the axis offset of the linear array speaker system. A virtual axis so that the angle of directivity of the linear array speaker system can be changed.
Not all renovations are done according to design requirements. In the later work, some dealers consulted us. Their current decoration has changed, some have changed heights, and some have changed the scope of sound reinforcement. How to adjust the installation angle of the linear array sound system to meet the existing sound reinforcement range? According to the dealer's problem, it is necessary to provide a sound system after the installation is completed. The directivity of the sound system does not need to change the installation mode of the linear array sound system to change the directivity of the sound system to meet the requirements of the sound reinforcement coverage. product.
The formation and requirements of directivity <br> Any sound source has a certain directivity in a certain frequency range, and also the directivity of any speaker system. The directivity is due to the mutual interference of sound waves, and the directivity to the speaker The system is good and bad. Why do we use a linear array sound system for sound reinforcement? The main purpose is to make full use of the linear array sound system to produce lower frequency directivity. The principle of the speaker system itself, the structural shape, and the transmission characteristics of the sound wave determine the size of the directivity. Since the principle and the acoustic characteristics cannot be changed, people now change the shape structure to achieve the change of directivity!
Why does the linear array sound system have a high sound pressure level and a long transmission distance? The main reason is that the linear array sound system controls the directivity of the high, medium and low frequency bands (how to control the directivity is the key to the linear array sound system), and controlling the directivity is to control the sound pressure level and control the sound. The pressure level controls the attenuation characteristics and the transmission distance. The relationship between the directivity characteristics of the sound source and the sound pressure level is shown in Figure 1. From the figure we can see that when the directivity changes from 360 to 45 degrees, the sound pressure level increases by 6 dB, and for the sound reinforcement distance, the distance increases by a factor of two. This is why you want to control directionality.
Figure 1 The relationship between directivity and sound pressure level
For an ordinary speaker system, the axis of its directivity is shown in Figure 2. It is characterized by a vertical relationship between the directional axis and the speaker. The directivity greater than the structural size of the speaker system is a 360 degree circle (lower frequency). If you want to adjust the directivity angle of the speaker system, you need to adjust the axis direction of the speaker, so it is more complicated. Especially for linear array sound systems, it is more complicated. In this way, in the current linear array sound system, there are arc arrays, J-shaped arrays and many other installation forms, in order to meet the requirements of directivity. The installation of several linear array sound systems is shown in Figure 3.
Figure 2 directionality diagram of the speaker
Figure 3 How to install several linear array speaker systems
It can be seen from Fig. 3 that in order to change the directivity of the linear array sound system, it is necessary to change the structure of the speaker. For different coverage areas, it is necessary to adjust the structural form frequently to meet the requirements of different coverage areas. The use of adjustment is very complicated, which is why the linear array sound system has a limited range of applications. To solve this problem, we have developed a linear array sound system with adjustable directivity.
How can we change the directivity <br> The formation of directivity is due to the interference of sound waves, then if we can control the interference form of sound waves, then we can not control the directivity? From the formation of the directivity of the linear array sound system in Figure 3, we can see that the linearity of the linear array sound system when it is in the vertical state is perpendicular to the array. When the linear array sound system is in other states, the directivity The axis deviates from the horizontal state, and there is a directivity at an angle to the ground.
Figure 3 How to install several linear array speaker systems
Therefore, to change the directivity angle of the speaker system, it is necessary to change the axis offset angle of the speaker system. See Figure 4 (the relationship between the directivity angle of the linear array speaker system and the system axis angle). From the angle of the offset, we can see the linear array. The speaker system has a positional offset after accumulating from above to below the speaker system. The offset of this position is the positional movement of the sound image (delay distance). According to this phenomenon, we can gradually delay the sound of the single speaker system without changing the axis offset of the linear array speaker system. A virtual axis so that the angle of directivity of the linear array speaker system can be changed.
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