Electric windows to prevent traffic noise
Due to the heavy traffic on the roads, the noise is becoming unbearable. To deal with this problem, Singapore's engineers have reduced the noise by up to 50% with the help of a device mounted on the steeple. What a practical demonstration to do. The device was developed by Ban Lam and his colleagues at Nanyang Technological University, Singapore.
It can halve the intensity of the noise coming from the window. It can easily reduce the noise of 10-decibel bells. The foot is mounted on a high grill window.
According to scientists, the distance between speakers is determined by the frequency of incoming noise. Experimentally, the system was installed in a model room where traffic and aircraft noise from a large loudspeaker two meters away. Was created, with a free frequency of 200 to 1000 Hz. Noise on major roads is usually equal to 1000 Hz. Experimentally 300 to 1000 Hz noise was successfully canceled. Throughout the process, the same technology was used in factory noise-reducing headphones, but these headphones can only reduce the noise of the aircraft.
Each speaker was placed at a distance of twelve and a half centimeters from each other and their direction was towards the sound and sensors were installed outside the window. Speakers were then placed at a distance of four and a half centimeters to cut sounds below 300 Hz.
According to experts, although it is possible to suppress other types of sounds, for this, the speakers have to be enlarged, so that all kinds of noise can be prevented. Experts say that the speakers try to reduce the intensity of noise by eliminating the free frequency. According to experts, this system is being installed in many institutions and factories, so that its further use can be noted.
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