Alain Arneodo, Jean-François Muzy and Didier Sornette 1 Centre de Recherche Paul Pascal, Av. Schweitzer, 33600 Pessac, France 2 Department of Earth and Space Science and Institute of Geophysics and Planetary Physics University of California, Los Angeles, California 90095 3 Laboratoire de Physique de la Matière Condensée, CNRS URA190 Université des Sciences, B.P. 70, Parc Valrose, 06108 Nice Ced...

Acknowledgements: We are grateful to Jeff Walker for excellent technical support and to Alain de Cheveigné for comments and discussion. Auditory objects are detected if they differ acoustically from the ongoing background. In simple cases, the appearance or disappearance of the object

ALAIN DUBOIS*, ALESSANDRO MINELLI** & ZHI-QIANG ZHANG*** * Reptiles & Amphibiens, UMR 7205 OSEB, Département de Systématique & Evolution, Muséum National d’Histoire Naturelle, CP 30, 25 rue Cuvier, 75005 Paris, France. ** Department of Biology, University of Padova, Via Ugo Bassi 58 B, 35131 Padova, Italy *** New Zealand Arthropod Collection, La...