On a recent holiday in Italy, my wife and I enjoyed a piano recital in Ravello on the Amalfi coast. It took place in an old, open-sided stone building which seemed to form part of the hunting area of a small bat we saw flying around before and during the concert. At one point the bat circled above the pianist for a couple of minutes. What impact, if any, would the music have had on the bat’s sonar?
• The frequencies bats use for echolocation vary from about 14,000 hertz to 100,000 hertz, well beyond the range of the music…
