Acoustic "black technology" is expected to solve the problem of noise pollution from school loudspeakers; two schools in Shenzhen are currently installing the system.

    School loudspeakers blaring noise is a long-standing problem. What can be done? At the 5th Shenzhen Educational Equipment Expo, which closed on the 18th, a cutting-edge acoustic technology-based noise reduction system made its debut, promising a solution to this major issue. It is understood that two schools in Shenzhen are currently installing the system.

The theme of this year's Educational Equipment Expo is "Digital Empowerment and Pioneering Demonstration". More than 350 companies participated, with an exhibition area of ​​30,000 square meters. Focusing on the digital transformation of education, the expo showcased new products, technologies, solutions and achievements in educational equipment, and revealed the development trends of the educational equipment industry.

At the exhibition, an acoustic technology company from Suzhou showcased their quiet playground system, classroom equalization sound field system, and acoustic science popularization and fun laboratory, allowing visitors to experience the "black technology" of acoustics firsthand. Visitors used sound leveling instruments to test the quiet playground's sound field control system. Standing directly in front of the speakers, the decibel level was nearly 90 decibels, while the level measured to the side immediately dropped to just over 70 decibels, thus addressing the "NIMBY" (Not In My Backyard) phenomenon caused by noise around schools.

According to on-site staff, the Quiet Playground System addresses the issue of noise pollution from school broadcasts by implementing a "one-to-one" sound field deployment plan. This system controls sound propagation at its source, achieving zoned sound control and directional propagation. Utilizing modern technology, it significantly reduces interference from playground broadcasts to nearby residential and school buildings. The system employs a "three-dimensional directional" function, resulting in a noticeable drop in sound pressure level to 20-30 decibels on its left, right, and rear sides.

According to reports, sound field control technology, in addition to solving noise pollution problems, can also be applied in the classroom. It is understood that sound field control technology uses core algorithms to specifically control sound pressure levels, achieving balanced sound propagation in the classroom and ensuring that every student hears a healthy sound pressure level. Furthermore, teachers can effortlessly produce clear, bright, smooth, and balanced lectures, ensuring that every student in the classroom can hear clearly and well.