A set of giant posters located in Madrid, London, Berlin, Brussels & Milan that monitor the noise level on a high-traffic roads. ambient noise levels are displayed via decibel meters connected to LED screens embedded in billboards, in homage to Noise Awareness Day (April 16). the posters were part of AEG-Electrolux’s advertising campaign supporting its new silent washing machine. the accompanying Web site also compares decibel levels of the major urban areas on line graphs to learn more about the detriments of noise pollution.
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