Abstract: An arrangement for electrical charge equalization after generation of stimulation current pulse(s), containing a bridge circuit, switching elements, a bridge branch between two legs of the bridge circuit, into which a load resistance is introducible, and a power source for generating a stimulation current pulse, connected to the legs of the bridge circuit that enables an electrical current via one leg through the bridge branch and through a leg connected to the other end of the bridge branch with corresponding switch position. A capacitive element is in the bridge branch for generating a current for electrical charge equalization for current introduced by stimulation current pulse(s) and is configured such that, between one or more stimulation current pulses and a discharge of the capacitive element via stimulation electrode(s), a delay time window is maintained, which is used for measuring electrical physiological signals induced as a reaction to the stimulation current pulse(s).

Abstract: An arrangement, configured for electrical charge equalization after the generation of one or more stimulation current pulses, containing a bridge circuit, switching elements, a bridge branch between two legs of the bridge circuit, into which a load resistance can be introduced, and at least one power source for generating at least one stimulation current pulse, which is connected to the legs of the bridge circuit in such a way that it enables an electrical current via one leg through the bridge branch and furthermore through a leg connected to the other end of the bridge branch with corresponding switch position.

Abstract: Electronic circuit arrangements for generating at least two different constant currents at a load resistor, including a bridge circuit (especially an H bridge=H bridge circuit) having at least (in the case of an H bridge, precisely) four legs, and switching elements and a bridge branch between the legs, in which the load resistor is inserted, and at least two current sources which are connected to the legs of the bridge circuit in such a manner that it provides for current via one of the legs through the bridge branch and through a leg, connected to the other end of the bridge branch, with a corresponding switch position, the at least two current sources being adjustable if desired. The use of the circuit arrangement for generating such stimulation currents and corresponding procedures currents and methods.

Abstract: Electronic circuit arrangements for generating at least two different constant currents at a load resistor, including a bridge circuit (especially an H bridge=H bridge circuit) having at least (in the case of an H bridge, precisely) four legs, and switching elements and a bridge branch between the legs, in which the load resistor is inserted, and at least two current sources which are connected to the legs of the bridge circuit in such a manner that it provides for current via one of the legs through the bridge branch and through a leg, connected to the other end of the bridge branch, with a corresponding switch position, the at least two current sources being adjustable if desired. The use of the circuit arrangement for generating such stimulation currents and corresponding procedures currents and methods.

Abstract: A method is described for and objective and frequency-specific determination of the audible threshold using an amplitude modulation following response (AMFR), for application in particular with infants and small children. According to the concept of the invention, instead of a single amplitude-modulated carrier, several carriers, preferably 3 or 5 carriers, having a frequency that is offset by a frequency difference &Dgr;F, preferably &Dgr;F=FMod or &Dgr;F=2 FMod, are used as a stimulus, wherein all carriers with the same modulation frequency FMod are modulated with an amplitude swing between 30% and 100%, preferably 100%. In addition, one or several of the amplitude-modulated carriers, which for an odd number of carriers are preferably the carriers located between the outermost carriers, can be frequency-modulated, wherein a frequency swing between 0% and 30%, preferably 20%, is selected.

Abstract: The invention discloses a process for the automatic determination of hearing of newborns and infants, by detecting the auditory brainstem responses (ABRs) or otacoustic emissions (OAEs), by testing in a frequency domain, by applying a predetermined initial acoustic stimulation level to a subject, pre-averaging a predetermined, sufficient, number of sweeps to yield a set of subaverages (SA), calculating a predetermined number, n, of frequency spectra based on the subaverages (SA), applying a q-sample uniform scores test or a q-sample Watson U.sup.2 test to determine phase and/or amplitude differences among the n frequency spectra. The number of frequency spectra, n, is determined by continuously averaging a predetermined number of initial sweeps to provide a predetermined number, m, of subaverages (SA), calculating m frequency spectra based on the m subaverages, and repeatedly applying the q-sample uniform scores test or the q-sample Watson U.sup.