title: [Studies on directional hearing ability by the self-recording device].
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D002648:Child; D002675:Child, Preschool; D003638:Deafness / Q000175:diagnosis; D004056:Differential Threshold; D005069:Evaluation Studies as Topic; D006320:Hearing Tests / Q000295:instrumentation / Q000379:methods*; D006801:Humans; D008875:Middle Aged