Benjamin D. Charlton

Vocal cues indicate level of arousal in infant African elephant roars.

Angela S. Stoeger, W. Fitch, H. Kratochvil, 2011, The Journal of the Acoustical Society of America.

Vocal cues indicate level of arousal in infant African elephant roars.

Angela S. Stoeger, H. Kratochvil, Benjamin D. Charlton, 2011, The Journal of the Acoustical Society of America.

Koalas use a novel vocal organ to produce unusually low-pitched mating calls

W. Fitch, D. Reby, R. Frey, 2013, Current Biology.

Female koalas prefer bellows in which lower formants indicate larger males

W. Fitch, B. Charlton, W. Ellis, 2012, Animal Behaviour.