Rodent Sound Localization and Spatial Hearing

Abstract

Sound localization and directional hearing are fundamental for rodents t=o successfully navigate their environment, detect predators and prey, and l=ocate conspecifics. In this chapter, the cues available to rodents for loca=lizing and discriminating sounds in space are reviewed, including interaura=l level and timing differences and spectral cues. The neural circuits suppo=rting sound localization are also introduced. Sound localization acuity and= directional hearing behavior in azimuth and elevation that have been measu=red in terrestrial and subterranean rodent species are compared. Due to the= limited scope of behavioral testing performed in most rodent species to da=te, binaural evoked potential studies that have been used to probe directio=nal hearing in rodents are also considered as an alternative to labor-inten=sive behavioral measures. Finally, the trends observed across species are s=ummarized and areas for future study are suggested.