Abstract: The present invention concerns a method for the detection of distortion products of otoacoustic emissions (DPOAE), comprising the steps: (a) output of at least one first pair of primary tones each consisting of a first primary tone with frequency f1,1 and sound pressure level L1,1 and a second primary tone with frequency f2,1 and sound pressure level L2,1 with f2,1>f1,1, and (b) detecting evoked distortion products of otoacoustic emissions (DPOAE), characterized in that the first primary tone {f1,1, L1,1} is output with a time delay tlag after the second primary tone {f2,1, L2,1}.

Abstract: The automated determination of an individual function of a DPOAE level map with pdp,I=f(L1, L2) of human or animal hearing. The method may include reading into a main memory a model function with model parameters of a DPOAE level map, based upon a number of N DPOAE measurements of a stimulation frequency pair with respectively different level pairs in a population (p) of a population of normally hearing subjects, automatically presenting n different level pairs of a stimulation frequency pair via tone output means to an individual and detecting the corresponding DPOAE's of the individual via tone recording means, wherein at least the first level pair is predefined, iteratively adapting the model function to the measured n DPOAE's until an individual function is obtained with individual parameters of a DPOAE level map of the individual, outputting the individual function and/or its individual parameters.

Abstract: The present invention concerns a method for the detection of distortion products of otoacoustic emissions (DPOAE), comprising the steps: (a) output of at least one first pair of primary tones each consisting of a first primary tone with frequency f1,1 and sound pressure level L1,1 and a second primary tone with frequency f2,1 and sound pressure level L2,1 with f2,1>f1,1, and (b) detecting evoked distortion products of otoacoustic emissions (DPOAE), characterized in that the first primary tone {f1,1, L1,1} is output with a time delay tlag after the second primary tone {f2,1, L2,1}.

Abstract: In a method for examining the faculty of hearing for at least one ear of a mammal, in which growth curves are determined on the basis of the measurement of DPOAE's evoked by pairs of excitation signals (f1, f2) for different excitation frequencies f2, the ear is presented with first excitation signals with a first excitation frequency f1 and a first noise level L1 and secondary excitation signals with a second excitation frequency f2 and a second noise level L2. Pulse pairs with a first pulse of the first excitation signal and a second pulse of the second excitation signal are presented in the ear, and the DPOAE's evoked thereby are captured and evaluated. A set of at least two different pulse pairs with different second excitation frequencies f2 is presented in one block that is repeated several times during a measuring period.

Abstract: The automated determination of an individual function of a DPOAE level map with pdp,I=f(L1, L2) of human or animal hearing. The method may include reading into a main memory a model function with model parameters of a DPOAE level map, based upon a number of N DPOAE measurements of a stimulation frequency pair with respectively different level pairs in a population (p) of a population of normally hearing subjects, automatically presenting n different level pairs of a stimulation frequency pair via tone output means to an individual and detecting the corresponding DPOAE's of the individual via tone recording means, wherein at least the first level pair is predefined, iteratively adapting the model function to the measured n DPOAE's until an individual function is obtained with individual parameters of a DPOAE level map of the individual, outputting the individual function and/or its individual parameters.

Abstract: In a method for examining the faculty of hearing for at least one ear of a mammal, in which growth curves are determined on the basis of the measurement of DPOAE's evoked by pairs of excitation signals (f1, f2) for different excitation frequencies f2, the ear is presented with first excitation signals with a first excitation frequency f1 and a first noise level L1 and secondary excitation signals with a second excitation frequency f2 and a second noise level L2. Pulse pairs with a first pulse of the first excitation signal and a second pulse of the second excitation signal are presented in the ear, and the DPOAE's evoked thereby are captured and evaluated. A set of at least two different pulse pairs with different second excitation frequencies f2 is presented in one block that is repeated several times during a measuring period.