Acute as a bug's ear: an informal discussion of hearing in insects / Ronald R. Hoy -- Biophysics of sound localization in insects / Axel Michelsen -- The sensory ecology of acoustic communication in insects / Heiner Römer -- Development of the insect auditory system / George S. Boyan -- Neural processing of acoustic signals / Gerald S. Pollack -- The evolutionary innovation of tympanal hearing in Diptera / Daniel Robert and Ronald R. Hoy -- The vibrational sense of spiders / Friedrich G. Barth -- The sensory coevolution of moths and bats / James H. Fullard