[Directional hearing and understanding of speech in noise uith "normal hearing" people (author's transl)]

Directional hearing and the ability to understand speech against a noisy background depend among other factors on the binaural signal processing mechanisms in human hearing. In present the practical audiometry can not prove completely the operation of binaural signal processing. This fact will be shown here with three patients who complain of bad understanding speech, but in audiometric tests seem to hear normally. In free field tests of directional hearing and understanding speech against a noisy background they differ clearly from a reference group of normal hearing people.