Noise diffraction on roads

In recent years, various solutions for the reduction of tyre-road noise have been proposed. These include single en double layer porous asphalt concrete (ZOAB), silent surface dressings and noise barriers. We propose a novel, additional solution contributing to the reduction of tyre-road noise: diffraction by means of side-resonators

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NoiseTube: mobile phone monitoring of noise pollution

They even tested it in Brussels:

Nice concept. I’m wondering how they deal with “fake” results as in: “driving around in your car with loud music”.

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