Makarand writes "The European continent has begun its fight against noise pollution by initiating a program to map noise levels for cities in the European Union with more than 250,000 people. As placing microphones on every building in London or Paris to measure noise was not practical, data on the amount of traffic carried by roads and the noise levels was fed into computers to generate a model of noise levels across the city. The model's accuracy was verified by taking readings with microphones at 100 points in the city and was found to be accurate on average to within 1 decibel. The noise maps will allow planning to insulate the public from noise by directing traffic away from residential areas and making funds available to sound-proof thin walled homes."
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