Emergency sirens and wolf howls are acoustically alike
Glenn Nagel / Alamy
There is an uncanny similarity between wolf howls and emergency sirens. The sound of a siren might be effective because we evolved to be alerted by howls, suggest researchers.
Hynek Burda at the Czech University of Life Sciences and his colleagues compared several dozen recordings of wolf howls with the sounds made by various emergency sirens, such as those on ambulances and in tornado-warning systems. Their analysis looked at the most important acoustic components of these sounds – for example their initial and closing frequencies or how …