ScienceDaily Posted January 11, 2013 Share Posted January 11, 2013 Birds can sing louder at higher frequencies and thereby make themselves heard over traffic noise. Read the full article on ScienceDaily Link to comment Share on other sites More sharing options...
PhysOrg Posted January 11, 2013 Author Share Posted January 11, 2013 (Phys.org)—Animals have developed a variety of strategies for dealing with increasing noise pollution in their habitats. It is known, for example, that many urban birds sing at a high pitch to differentiate their song from the low-frequency sound of road traffic. However, as scientists from the Max Planck Institute for Ornithology discovered, this is just a useful side effect. The real reason for this behaviour is that songs at a higher pitch are also automatically louder. The birds can make themselves heard far better in city noise by increasing the volume of their song than by raising its frequency. Read the full article on PhysOrg Link to comment Share on other sites More sharing options...
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