Tomorrow's Cities: How Barcelona shushed noise-makers with sensors
Media playback is unsupported on your device In the heart of the bustling city of Barcelona is a square that at first sight seems like an oasis of calm. The Plaza del Sol, as the name suggests, is a suntrap and the perfect place to while away a few hours.The problem is that the square is just too popular and for many of the city's young inhabitants has become the number one venue to meet friends and hang out until the small hours.One resident said it was like living in a permanent party.Even the shops around the square reflect its reputation for late-night carousing, selling beer, pizza and little else.The situation had become unbearable for those with apartments around the square, who have lived with unacceptable noise levels for the past 20 ...