How the elephant gets its infrasound

Blowing air through a pachyderm’s larynx offers hints to low-frequency communication

Elephants don’t purr so much as sing when they unleash low-frequency rumblings at friends and foes kilometers away.

NOT PURRING African elephants (shown here in Amboseli National Park) can send long-distance, low-frequency messages that depend on vocal mechanisms that are more like people singing than like cats purring.