The composite of the two sounds that an individual reports hearing depends on how he processes this diverse information and that, Dr Drayna believes, may well be influenced by genetics.

ECONOMIST: Twin research

In China, where Hong Kong's Hang Seng Index climbed 0.7% and the mainland's Shanghai Composite Index dropped 0.2%, investors were digesting a string of earnings reports from large Chinese companies.

WSJ: Cyprus Bailout Relief Lifts Asian Shares

In China, where Hong Kong's Hang Seng Index climbed 0.6% to 22251.15 and the mainland's Shanghai Composite Index ended down 0.1% at 2326.71, investors were digesting a string of earnings reports from large Chinese companies.

WSJ: Cyprus Bailout Relief Lifts Asian Shares