School playground broadcasting does not disturb residents, outdoor directional sound column

　　Quiet playground system

　　Source noise reduction creates a smart and healthy campus

Quiet playground system（School playground broadcasting does not disturb residents, outdoor directional sound column）It is a playground sound environment solution independently developed by Qingting Acoustics, focusing on the development needs of schools and protecting students' hearing health. On the basis of Dujia's core directional sound technology, local sound field control technology and Dujia's specialized A-AFC algorithm are used to overcome the problem of controlling the sound field at the back of the system, achieve "sound locking" of the sound field behind the equipment, and make the maximum sound pressure difference between the front and rear of the equipment reach 40dB, allowing the sound to propagate within a controllable specified range, achieving source noise reduction, effectively reducing noise interference in residential areas, and returning quietness to the public, helping schools create a healthy and upward teaching sound environment.

　　Technical advantages of quiet playground system

1. Technology noise reduction

Concentrate the sound in front of the device to produce sound, with a maximum sound pressure difference of 40dB between the front and rear, reducing interference to the surrounding area and achieving source prevention and control.

2. Directional sound transmission

By utilizing the directional sound generation technology and local sound field control algorithm of Quanqiu Lingxian, sound directional propagation and precise coverage can be achieved.

3. Balanced coverage

Breaking through the barriers of low-frequency technology, achieving 125Hz surging bass and balanced coverage of the entire playground area across all frequency bands.

4. Remote control

Equipped with a sound perception platform cloud control system, it can remotely control sound sources, sound zones, etc., making operation convenient.

5. Adjustable sound angle

Flexible adjustment of the sound angle of "low, medium, and high" speech can solve the problem of crosstalk and improve the utilization rate of the playground.

　　Product Display

The "Quiet Playground" Acoustic Innovation Application System utilizes directional sound technology to achieve balanced sound field on the playground, solving problems such as traditional broadcasting reverberation, asynchrony, and delay. It effectively solves the problem of noise disturbance caused by broadcasting systems to teaching buildings, offices, and nearby residential buildings during outdoor teaching.

　　Detail Display

　　Comparison of sound field before and after renovation

　　Application Cases

With the continuous efforts of the "Ten Thousand Schools Clear Listening" campaign, the Clear Listening Acoustic Quiet Playground System（School playground broadcasting does not disturb residents, outdoor directional sound column）It has been implemented in over 300 cities and 4000 schools across the country, effectively promoting a harmonious campus acoustic environment and advancing the construction of smart "acoustic" campuses through technological means. In the future, Qingting Acoustics will continue to iterate and upgrade its products, bringing users a better sound experience.

　　Regarding Clear Listening

Qingting Acoustics was founded in 2015, focusing on the research and application of innovative acoustic technologies. We are committed to integrating innovative acoustic technologies with industry needs and expanding the implementation of "sound+" innovative application solutions in various industries.

Qingting Acoustics has always been based on the strategic focus of acoustic innovation, adhering to technological innovation as the core driving force, relying on innovative acoustic technologies such as directional sound generation, sound source positioning, sound imaging, sound detection, and balanced sound field control, to develop products and services based on various acoustic technologies, create a full scene intelligent innovation "sound state chain", and continuously empower industry innovation with technological innovation.

　　Corporate Honors