The construction of a 14-story apartment bloc in front of my house in Tokyo has got me thinking about city noise. When the steel skeleton was first going up, workers strung up an elephant-grey curtain that was designed to dampen sound. I know this because bo-on -- sound-proofing -- was printed in huge Japanese kanji characters on the side facing my house. Did it work? Not well enough. I am regularly distracted by the clanking of metal or high-pitched whine of machinery, whose disonance resembles the rhythm section of an orchestra warming up backstage before a concert.