Patented technology of Gradient Beam Technology (GBT) column speaker system
2025.06.27
The gradient beam DSP sound column is based on in-depth research on spatial acoustics and exploration of sound wave radiation in vertical and horizontal directions. By adding physical directional waveguides, the generation of useless side lobes is suppressed to obtain the expected directivity. At the same time, in the horizontal direction, through the combination of physical structure design and DSP signal processing, three directional beams with different horizontal radiation angles are formed, which are responsible for the sound field coverage of the near field, midfield and far field respectively. Each beam can adjust the sound pressure coverage intensity. The near field can be adjusted by DSP to achieve horizontal directivity adjustment, and the effect of pointing to the horizontal direction is achieved. The asymmetric vertical radiation technology is processed by digital DSP technology, and a gradual delay is implemented on the three sound waves. It is combined with a specially designed acoustic structure to process each sound wave to produce an asymmetric vertical radiation method, forming a radiation angle downward, obtaining the final required time domain and amplitude, and providing a consistent radiation sound pressure level. At the same time, it has a strong effect of suppressing side-interpretation, thereby improving the uniformity of spatial sound wave radiation, eliminating listening blind spots, and improving the clarity of language reinforcement. Especially when used in spaces with long reverberation time, it has anti-reverberation effect and can increase the voice clarity in reverberation environment. It is widely used in large and medium-sized command centers, lecture halls, religious places, airports, railway stations, lobbies, convention and exhibition centers, museums, etc.
Command Center
Lecture Hall
Core Technology
1. Adopt directional waveguide technology
Suppress the generation of useless side lobes and obtain the expected directivity.
Without waveguide, side lobes are obvious
Adding a waveguide can suppress the side lobes
2.Horizontal radiation angle gradient beam technology
Three directional beams with different horizontal radiation angles are formed, which are responsible for the sound field coverage of the front field, midfield and far field respectively. Each beam can adjust the sound pressure coverage intensity. According to the acoustic characteristics, the narrower the beam, the longer the projection distance, and the wider the beam, the wider the radiation surface, but the radiation distance is not far, so the three beams are set as: 160 degrees for the front field beam, 100 degrees for the midfield beam, and 60 degrees for the far field.
3.Front-field beam directivity variable technology
DSP can be used to adjust the horizontal radiation angle, and the expected area can be radiated in a targeted manner, while the radiation in the invalid area can be reduced, such as reducing wall reflections, improving the interference of useless sound waves in the space and the long reverberation time, directly obtaining direct sound, and improving language clarity.
4.Asymmetric vertical radiation technology
In order to ensure that the sound field in the front and back fields is relatively uniform, traditional sound columns are installed in a physical way, with the speakers tilted downward for radiation, but this affects the aesthetics of the speakers blending into the space. To solve this problem, asymmetric vertical radiation technology is used, and a gradual delay is implemented on the three sound waves through digital DSP technology, and each sound wave is processed in combination with a specially designed acoustic structure to produce an asymmetric vertical radiation method, forming a downward radiation angle, and greatly reducing the upward emission of sound, attenuating the acoustic reflection of the ceiling, obtaining the final required time domain and amplitude, and providing a consistent radiation sound pressure level, while having a strong effect of suppressing side-interference. Strong direct sound, clean and clear sound.
