Günther Scholz

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Low-frequency masking is a new method for the diagnosis of endolymphatic hydrops. A short acoustic stimulus and a low-frequency masker tone are applied to the same ear in an adjustable phase relationship. We recorded phase-dependent masked thresholds from normal-hearing subjects, and patients with Ménière's disease and sensory hearing loss without vertigo.(More)
From experiments in animals and investigations in humans it is known that the normally phase-dependent masking of a short stimulus by a low-frequency continuous tone does not occur in the case of endolymphatic hydrops. The recording of the masked threshold of short tone stimuli in a loud tone of 30 Hz is to be evaluated for the clinical diagnostics of(More)
Die Tieftonmodulation von DPOAE ist eine objektive audiometrische Methode, die zur Diagnostik eines endolymphatischen Hydrops (EH) - z. B. bei Morbus Menière—geeignet erscheint. Bei 20 Patienten mit einseitiger Menière-Symptomatik sowie 20 Hörgesunden als Kontrollgruppe wurden die supprimierten DPOAE bei den Primärtonfrequenzen f1 = 1675 und f2 = 2012,5 Hz(More)
During spermatogenesis in mammals the evolutionary early histones are replaced step by step by more species specific nucleoproteins (protamines). The protamines protect the genetic information of the male against mutagenic or other damaging influences and possibly play a role in male fertility. A method was presented to study the nucleoproteins (NP) of(More)
The diagnosis of Menière's disease is uncertain when the typical symptoms do not occur completely and definitely. A reliable finding of an endolymphatic hydrops (EH) is the base for a correct prognosis and therapy. Electrocochleography is a proven diagnostic procedure but requires a lot of time and of technical know-how. The mobility of cochlear partition(More)
Low-frequency masking is a recent clinical procedure for the differential diagnosis of sensory hearing loss. Currently this requires the recording of the phase-dependent masked subjective threshold, which is time consuming and not always accurate. As an objective method, the recording of modulated distortion product otoacoustic emissions (DPOAEs) can be(More)
The subjective recording of the masked threshold of short acoustical stimuli with a loud tone of 30 Hz (phase audiogram) has been used for the clinical diagnosis of endolymphatic hydrops (EH). In normally-hearing subjects, a marked modulation of the threshold was found, depending on the phase of the low-frequency tone. A very small dependence was found in(More)
An der Auslösung der akustisch evozierten Hirnpotentiale mittlerer Latenz (MLR) sind aufgrund der längeren Latenz und breiteren Potentialform apikale Bereiche der Kochlea stärker beteiligt als bei den frühen Hirnstammreaktionen. Bisher lagen keine genauen Informationen über die Einflüsse des Reizfrequenzspektrums auf die Amplitude und Latenz der MLR vor.(More)
Previous physiological studies investigating the transfer of low-frequency sound into the cochlea have been invasive. Predictions about the human cochlea are based on anatomical similarities with animal cochleae but no direct comparison has been possible. This paper presents a noninvasive method of observing low frequency cochlear vibration using distortion(More)
Low-frequency tones were reported to modulate the amplitude of distortion product otoacoustic emissions (DPOAEs) indicating periodic changes of the operating point of the cochlear amplifier. The present study investigates potential differences between infrasound and low-frequency sounds in their ability to modulate human DPOAEs. DPOAEs were recorded in 12(More)