For Bluetooth noise-cancelling headphones that are so very clever, their manufacturer, Sony, doesn’t go out of its way to walk you through their operation. In the box is a reference guide, which has no instructions at all, and a set of operating instructions that are entirely pictorial, folding out into a large A2 sheet covered on both sides with pictures and arrows among which you may, once you adjust to picto-language, find the answer to any question you’re pondering.
Why, for example, is the word ‘ambient’ marked on the NC button? What are the bunch of test tones in your ears followed by the announcement ‘optimised’ when you hold the NC button for too long? Answers give they none at all, while only a separate slip of paper and a…