title: Free-field acoustic stimulation: a reliable, inexpensive system for positioning loudspeaker.
abstract: We describe a single mechanical system for locating a sound source anywhere on the surface of an imaginary sphere centred on an animal subject. The system has been used in neurophysiological studies of localization in guinea-pig and example neural data are shown.
mesh_terms: D000161:Acoustic Stimulation / Q000295:instrumentation*; D000818:Animals; D001307:Auditory Perception / Q000502:physiology; D001698:Biomedical Engineering; D006168:Guinea Pigs; D013477:Superior Colliculi / Q000502:physiology