[The prognosis of the noise-induced permanent hearing-loss (author's transl)].
Basing on a microscopic study the question was explored whether a TTS is found in the high-frequency range after exposure to a low-frequency tone or not. Such a depression is demonstrable after several registrations with automatic audiometry. This depression is significantly higher in the average of normal-hearing persons than in noise-resistant men (having a normal threshold after working in noise for many years). Also after the exposure the spikes of the Békésy-audiogram are significantly smaller in the noise-resistant men than in the control-group. Paying attention to both parameters the significance is 1%. Therefore the investigation of the high-frequency-range after exposure to a low-frequency tone seems to be a method of prediction of PTS.
D001299:Audiometry; D006311:Hearing Disorders / Q000175:diagnosis / Q000209:etiology*; D006801:Humans; D008297:Male; D009622:Noise / Q000009:adverse effects*; D009784:Occupational Diseases / Q000175:diagnosis / Q000209:etiology; D011999:Recruitment, Neurophysiological
Zum Problem der Prognose des lärmbedingten, bleibenden Hörschadens