Noise refers to the sound produced when a vibrating body undergoes irregular vibration. When noise causes adverse effects on humans and the surrounding environment, it forms noise pollution.
In recent years, noise pollution has become increasingly serious. According to incomplete statistics, in 2020, the total number of environmental noise complaints and reports received by national departments such as ecology and environment, public security, housing and urban-rural development reached approximately 2.018 million. Among them, complaints and reports about social life noise were the most, accounting for 53.7% with about 1.083 million cases. For social life noise, the most serious problems were the noise disturbance caused by square dancing and the noise disturbance from school playgrounds.
Playground - Noise-Free Intelligent Frequency-Division Directional Campus Broadcast All-in-One Machine - OSEN-200H
Product Parameters
Sound Emitting Angle: 60°;
Transmission Distance: ≤ 100 meters;
Maximum Sound Pressure Level: ≥ 110 dB;
Noise Reduction Amount: ≥ 30 dB @ 1 meter;
Rated Power: 200 W;
Audio Input: Microphone, USB Flash Drive, AUX, RCA;
Suggestions Based on On-Site Survey of Schools:
400-meter Track: ≥ 25 units;
300-meter Track: ≥ 18 units;
200-meter Track: ≥ 8 directional broadcast units.
Product Features
Universal Bracket for Adjusting Sound Field Balance
High-Frequency Directional Waterproof Speaker
Low-Frequency Directional Waterproof Speaker
Integrated Waterproof Body
Easy Installation with Wall-Mounted Bracket
Since the ultrasonic speaker produces no sound at the rear, when the playground is particularly close to residential areas, the proportion of the ultrasonic speaker can be increased and the proportion of the low-frequency speaker can be reduced. It is suitable for scenarios where the distance to residential areas is ≤ 20 meters. It delivers excellent sound quality without disturbing residents.
Playground - Phased Array Beamforming Directional Campus Broadcast All-in-One Machine - OSEN-100H
Suggestions Based on On-Site Survey of Schools:
400-meter Track: ≥ 20 units;
300-meter Track: ≥ 12 units;
200-meter Track: ≥ 8 units.
Key Parameters:
Single Unit Power: 350 W;
Coverage Area: Approximately 500 - 800 square meters;
Sound Emitting Angle: 60° at the front;
Noise Reduction: ≥ 25 dB;
Supported Audio Inputs: Microphone, USB Flash Drive, AUX, RCA.
It delivers excellent sound quality without disturbing residents. It is suitable for scenarios where the distance to residential areas is more than 20 meters, or specifically ≥ 20 meters. It maintains excellent sound quality while ensuring no disturbance to residents.
Playground - Ultrasonic + Phased Array Beamforming Directional Campus Broadcast Split Machine - OSEN-300H
Suggestions Based on On-Site Survey of Schools:
400-meter Track: ≥ 20 units;
300-meter Track: ≥ 12 units;
200-meter Track: ≥ 8 units.
Key Parameters:
Single Unit Power: 400 W;
Coverage Area: Approximately 600 - 800 square meters;
Sound Emitting Angle: 60° at the front;
Noise Reduction: ≥ 25 dB;
Supported Audio Inputs: Microphone, USB Flash Drive, AUX, RCA.
The volume of the ultrasonic component and the phased array component can be adjusted independently. One set of this equipment is equivalent to two sets of speakers.
Since the ultrasonic speaker produces no sound at the rear, when the playground is particularly close to residential areas, the proportion of the ultrasonic speaker can be increased while the proportion of the phased array speaker can be reduced. Therefore, it is particularly suitable for scenarios where the distance to residential areas is ≤ 20 meters. It delivers excellent sound quality without disturbing residents.
