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At least 685 records · Page 38Linked to original sources
PubMed1988

[Possibilities and limits of speech audiometry in non-German speaking foreigners].

The possibility of testing the discrimination for monosyllabic words in the so-called "Freiburger-Sprachtest by Hahlbrock" in foreigners, who are unable to speak or to understand the German language, is discussed in the literature with different results. Most of the authors and experts advocate the opinion, that the monosyllabic word test (with test words in German) is not valid for foreigners. In our own medical expertizing we found, that this opinion is incorrect and invalid. Foreigners unable to speak or understand German can be examined with the monosyllabic discrimination test by Hahlbrock. The results were fully comparable with the results from Germans. To safeguard these results of discrimination tests, 50 randomized foreigners without any knowledge of German were examined under exact conditions in the same way as Germans. The result of these examinations prove the possibility of testing the discrimination for monosyllabic words in foreigners, who cannot speak or understand German words, via the Hahlbrock test or whispering word test.

Adult↗
PubMed1987

[Categorizing hearing disorders based on latency deviations in the BERA (brainstem electric response audiometry)].

The dependence of latencies of EAEPs (Early Auditory Evoked Potentials) on stimulus intensity has been determined from measurements at 15 normal hearing subjects. The results are in good agreement with an exponential function, which has been empirically found and fitted to the data. The deviation from this function in case of hearing disorders can be classified in terms of a "latency deviation diagram". In the simplest case of a pure conductive hearing loss, the effect on latencies is a mere shift of all values to higher levels. The resultant latency deviation lines can be computed and the results introduced in the diagram. This has been done in Figure 5 for several values of hearing loss between 10 dB and 50 dB. These lines permit a detailed specification of hearing impairment, as is demonstrated in Figure 6: In the case of pure conduction loss, the latency deviation follows the appropriate line. Inner ear pathologies involving recruitment lead to latency deviations which are much steeper than these lines and which tend to vanish at higher stimulus levels. Retrocochlear disorders exhibit a nearly level independent latency deviation diagram.

Adult↗
PubMed1987

[Does pure-tone audiometry provide inferences for a vascular cause of sudden deafness?].

The theory that sudden hearing loss is caused by some form of vascular catastrophe has not been confirmed by pathological evidence, but it agrees with a number of clinical observations. But there are several pieces of experimental and clinical evidence that cast serious doubt upon a vascular hypothesis, especially the considerable variability in site and degree of cochlear and vestibular impairment. A review of the vascular anatomy of the inner ear makes it clear that many clinically observed audiometric patterns and associated partial vestibular deficits in idiopathic sudden hearing loss cannot be explained by assigning a site of presumed vascular occlusion. We investigated 166 pure tone audiograms of patients with idiopathic sudden hearing loss by using the statistical method of cluster analysis, which allow an explanation based on the vascular anatomy. Three types of audiograms could be found which differed not in shape but in the degree of hearing loss. None of them can be explained by the vascular anatomy. The three groups of audiograms with different degrees of hearing loss allowed investigations of the influence of age, sex, vestibular disturbance and vascular disease. Men are more often affected, the degree of the hearing loss is not dependent on age, vestibular disturbance, vascular disease, diabetes or smoking. The prognosis for sudden hearing loss is independent of all the investigated parameters. Our findings support the conclusion that a vascular hypothesis cannot adequately explain the clinical findings in idiopathic sudden hearing loss.

Audiometry↗