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E-mail
csj@audfly.com
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Phone
15262411757
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Address
3rd Floor, Building 4, No. 78 Keling Road, High tech Zone, Suzhou City, Jiangsu Province
Suzhou Qingting Acoustic Technology Co., Ltd
Understanding the functional characteristics of each component of the guided directional speaker is essential for better use
Date: 2025-12-18Read: 11
Guided speaker is an audio device that uses ultrasonic modulation technology to focus sound energy into a narrow beam for directional propagation, achieving the effect of only transmitting sound to the target area and not being heard by others. Widely used in museums, exhibition halls, commercial windows, hospital guidance, intelligent transportation and other scenarios, balancing information transmission and environmental tranquility. The precise sound field control capability of guided directional speakers is derived from the collaborative design of multiple innovative functional modules.
1、 Ultrasonic transducer array
Linear or planar arrays composed of dozens to hundreds of high-frequency piezoelectric ceramic units convert electrical signals into ultrasonic waves at around 40kHz. By using phased array technology to precisely control the phase of each unit, ultrasonic waves are nonlinearly self demodulated in air, restoring audible sound (20Hz-20kHz) and forming a highly directional sound beam with a width of only 15-30 °, with an effective propagation distance of 3-10 meters.
2、 Digital Signal Processor (DSP)
Built in high-performance DSP chip, real-time completion of audio signal pre distortion compensation, frequency equalization, and beamforming algorithms, offsetting air absorption and nonlinear distortion, ensuring clear and natural restored sound quality; Support adjusting the beam angle, focal position, and volume partition to adapt to different spatial layouts.
3、 Shell and Acoustic Structure
Adopting aluminum alloy or engineering plastic integrated molding, the surface can be customized for spraying or bonding with the exhibition wall, achieving "invisible sound"; Internally optimized sound cavity design to suppress sidelobe interference and improve the purity of the main sound beam; Some models integrate infrared/radar sensing modules to achieve intelligent interaction of "sound when people come, sound when people walk".
4、 Amplifier and power module
D-class digital amplifiers provide high-efficiency (>90%), low heat drive, and are suitable for long-term continuous operation; Wide voltage input (AC100-240V) and overload protection circuit ensure safe operation in complex environments.
5、 Installation and linkage interface
Support wall mounted, suspended or embedded installation; Equipped with RJ45 (PoE), RS485, or Bluetooth/WiFi interfaces, it can be connected to central control systems, apps, or cloud platforms to achieve multi-point synchronous playback, remote management, and content updates.