Embargoed to 1900 Thursday August 2.
Undated handout photo of African elephants in Amboseli National Park. Elephants employ the same voice mechanism as human singers to generate deep “infrasound” rumbles, scientists found. PRESS ASSOCIATION Photo. Issue date: Thursday August 2, 2012. See PA story SCIENCE Elephants. Photo credit should read: Angela S. Stoeger/PA Wire NOTE TO EDITORS: This handout photo may only be used in for editorial reporting purposes for the contemporaneous illustration of events, things or the people in the image or facts mentioned in the caption. Reuse of the picture may require further permission from the copyright holder.