Rolf -D. Battmer

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Die Komponente P6 der Hirnstammreizantwort ist nur auf das Hören im Hochtonbereich ≥2 kHz zu beziehen, läßt sich aber bis an die Hörschwelle verfolgen. Die Hirnrindenreizantwort N90 dagegen ist frequenzspezifisch, bis an die subjektive Hörschwelle heran jedoch kaum zu erfassen. Die langsame Hirnstammkomponente SN10 (Davis und Hirsh 1979) soll unbeeinflußt(More)
In order to reduce measurement time we have used part of the interstimulus interval of the slow cortical responses to record fast brain stem responses. For this purpose we reconstructed a programmable audiometer and preamplifier which are controlled by a computer. These, with 1/4 ms-click and tone-burst stimulation simultaneously gained fast and slow(More)
The behavior of the acoustic reflex induced by 1/4 ms clicks in rates of 10, 20, 50, and 100 Hz (3 s duration, 2 s interstimulus interval) was examined. We found that 1. only rates of > 20 Hz are able to produce a contraction of the middle ear muscle, 2. the reflex threshold for clicks with respect to the peak sound-pressure is below the reflex threshold of(More)
The preoperative audiological findings of two patients with later on confirmed cerebello-pontine angle tumor are used to demonstrate how much uncharacteristically the pure tone threshold and supra threshold tests may look like. Common to both patients is, that the tumor only affected the brain stem but not the inner ear canal.
From 60 patients with different types of sensorial hearing impairment (15 high-tone hearing losses, 15 high-tone dips, 15 middle-tone hearing losses and 15 low-tone hearing losses) we recorded the fast brainstem response P6. These data were compared with those of the pure tone threshold in the frequency range of 500–8000 cps and the differences were matched(More)
Telephone-lines suit for the transmission also of digital data along long distances. In ERA this technique is favourable, 1. because the application of a computer is necessary anyway and the primarily analogous data have to be transformed in digital ones anyhow and 2. because the expences for purchase, maintainance and operation of the complete equipment(More)
In 10 normal hearing persons we tested the following ear protectors: cotton wool, elastic ear plugs, plastic ear plugs and ear muffs. The protecting effect was determined in three ways: 1. by conventional method; 2. by measuring evoked responses of the cortex; 3. by measuring evoked responses of the brain stem. In the conventional method, we only compared(More)
Crosshearing depends on the difference of hearing loss between both ears and the level of sound intensity stimulating. From 12 unilateral deafs we recorded the fast brainstem response P6 and the slow cortical response N90 to crossheard click and tone stimulation, i.e., first we stimulated the „bad“ ear and recorded the responses with an electrode position(More)
The fast brainstem response P6 is — for the frequency range of ≥ 2000 Hz and with help of sedation — the best threshold indicator. The slow cortical response N90, indeed frequency specific, is nearly impossible to derive in sedation and, therefore, can't merely be used for estimating auditory thresholds of children. The slow brainstem response SN10 (Davis(More)
Mit Hilfe eines Audiometers, das über einen zusätzlichen seriellen Ausgang verfügt, eines Rechners (DEC PDP 11/03) sowie eines Eingabe- und Sichtgerätes (DEC VT 55) lassen sich audiometrische Meßdaten on-line speichern, digital ordnen und diagraphisch wiedergeben. Die Eingabe kann man auf dem Display jederzeit kontrollieren und wie ein Audiogramm lesen. Für(More)
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