title: Amplitude and phase equalization of stimuli for click evoked auditory brainstem responses.
abstract: Although auditory brainstem responses (ABRs), the sound-evoked brain activity in response to transient sounds, are routinely measured in humans and animals there are often differences in ABR waveform morphology across studies. One possible reason may be the method of stimulus calibration. To explore this hypothesis, click-evoked ABRs were measured from seven ears in four Mongolian gerbils (Meriones unguiculatus) using three common spectrum calibration strategies: Minimum phase filter, linear phase filter, and no filter. The results show significantly higher ABR amplitude and signal-to-noise ratio, and better waveform resolution with the minimum phase filtered click than with the other strategies.
authors.affiliation: Cluster of Excellence "Hearing4all," Animal Physiology and Behavior Group, Department of Neurosciences, School of Medicine and Health Sciences, Carl von Ossietzky University of Oldenburg, Oldenburg, Germany rainer.beutelmann@uni-oldenburg.de, genevieve.laumen@uni-oldenburg.de.
authors.forename: Rainer
authors.initials: R
authors.lastname: Beutelmann
authors.affiliation: Cluster of Excellence "Hearing4all," Animal Physiology and Behavior Group, Department of Neurosciences, School of Medicine and Health Sciences, Carl von Ossietzky University of Oldenburg, Oldenburg, Germany rainer.beutelmann@uni-oldenburg.de, genevieve.laumen@uni-oldenburg.de.
authors.forename: Geneviève
authors.initials: G
authors.lastname: Laumen
authors.affiliation: Department of Physiology and Biophysics, School of Medicine, University of Colorado, Aurora, Colorado 80045 daniel.tollin@ucdenver.edu.
authors.forename: Daniel
authors.initials: D
authors.lastname: Tollin
authors.affiliation: Cluster of Excellence "Hearing4all," Animal Physiology and Behavior Group, Department of Neurosciences, School of Medicine and Health Sciences, Carl von Ossietzky University of Oldenburg, Oldenburg, Germany georg.klump@uni-oldenburg.de.
authors.forename: Georg M
authors.initials: GM
authors.lastname: Klump
mesh_terms: D000161:Acoustic Stimulation; D000818:Animals; D002138:Calibration; D016057:Evoked Potentials, Auditory, Brain Stem / Q000502:physiology*; D005849:Gerbillinae / Q000502:physiology; D059629:Signal-To-Noise Ratio; D013016:Sound; D058067:Wavelet Analysis