The gradient beam DSP column speaker is based on in-depth research on space acoustics and exploration of sound wave radiation in the vertical and horizontal directions. By adding physical directional waveguides, the generation of useless side lobes is suppressed and the expected directivity is obtained.

In the horizontal direction, through a combination of physical structure design and DSP signal processing, three directional beams with different horizontal radiation angles are formed, respectively responsible for sound field coverage in the near field, midfield and far field. The sound pressure coverage intensity of each beam can be adjusted, and the near field can be adjusted through DSP to achieve horizontal directivity adjustment, achieving the effect of hitting wherever you point in the horizontal direction.

Asymmetrical vertical radiation technology is processed through digital DSP technology, which implements a gradual delay for 3 beams of sound waves, and combines a specially designed acoustic structure to process each beam of sound waves to produce an asymmetrical vertical radiation pattern, forming a downward Radiation angle, obtain the final required time domain and amplitude, and provide consistent radiation sound pressure level, while having a strong suppression effect, thereby improving the uniformity of spatial sound wave radiation, eliminating listening blind spots, and improving speech amplification It can improve the sound clarity, especially when used in spaces with long reverberation times. It has the effect of anti-reverberation and can increase the speech clarity in reverberant environments.

This type of column speaker is widely used in large and medium-sized command centers, lecture halls, religious sites, airports, train stations, lobbies, convention and exhibition centers, museums, etc.

Core Technology

1. Adopt directional waveguide technology to suppress the generation of useless side lobes and obtain the expected directivity;

2. The technology of gradient beam with horizontal radiation angle forms three directional beams with different horizontal radiation angles, 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. The variable directivity technology of the front-field beam can realize the adjustment of the horizontal radiation angle through DSP, and can radiate the expected area in a targeted manner, while the radiation in the invalid area can be reduced, such as reducing wall reflection, 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. 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. However, this affects the aesthetics of the speakers in the space. To solve this problem, asymmetric vertical radiation technology is used. 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 radiation angle downward, 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 consistent radiation sound pressure level, while having a strong effect of suppressing side-splitting. Strong direct sound, clean and clear sound.