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Pressure And Particle Motion Detection Thresholds In Fish: A Re-Examination Of Salient Auditory Cues In Teleosts, Craig A. Radford, John C. Montgomery, Paul Caiger, Dennis M. Higgs

Biological Sciences Publications

The auditory evoked potential technique has been used for the past 30years to evaluate the hearing ability of fish. The resulting audiograms are typically presented in terms of sound pressure (dB re. 1Pa) with the particle motion (dB re. 1ms–2) component largely ignored until recently. When audiograms have been presented in terms of particle acceleration, one of two approaches has been used for stimulus characterisation: measuring the pressure gradient between two hydrophones or using accelerometers. With rare exceptions these values are presented from experiments using a speaker as the stimulus, thus making it impossible to truly separate the contribution of …