The responses of auditory units with limited spatial receptive fields (L-F units) were studied before and after acute monaural occlusion. The L-F units were recorded in the space-mapped region of the midbrain auditory nucleus (MLD) of the owl (Tyro alba). Excitatory receptive fields and best areas were plotted using a movable sound source under free-field conditions.
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Knudsen et al. (1980) studied this question.