Method for operating an apparatus for tinnitus characterization and corresponding apparatus
A method operates an apparatus for tinnitus characterization, in which, in a first step, a broadband test signal having a number of signal frequencies is generated and compared with a tinnitus noise. The respective test signal is stored with an associated comparison result. A probability correlation for determining the tinnitus noise is established based on the stored test signals and comparison results. In a second step, the amplitudes of the individual signal frequencies of the test signal are varied. The first and second steps are performed repeatedly until the probability correlation reaches or exceeds a first threshold value. In a third step, the amplitudes of the individual signal frequencies of the test signal are varied with reference to the probability correlation.
1. A method for operating an apparatus for tinnitus characterization, which comprises the steps of:
performing a first step which comprises the substeps of:
generating, via a signal generator, a broadband test signal having a plurality of narrowband signal frequencies disposed adjacent to each other;
outputting the broadband test signal to a user for masking a tinnitus noise;
comparing the broadband test signal with the tinnitus noise to determine a masking effect the broadband test signal has on the tinnitus noise;
storing the broadband test signal with an associated comparison result in a memory of a controller; and
determining a probability correlation for determining the tinnitus noise based on stored broadband test signals and associated comparison results, wherein in a case of a positive comparison result where the tinnitus noise is masked by the broadband test signal, the probability correlation for determining the tinnitus noise based on a correlation among commonalities of all positive comparison results being determined from the stored broadband test signals and the associated comparison results;
performing a second step which varies amplitudes of individual ones of the signal frequencies of the broadband test signal via a random number generator of the controller;
repeatedly performing the first and second steps until the probability correlation reaches or exceeds a first threshold value, wherein the first threshold value corresponding to a minimum number of the positive comparison results having a minimum probability that the broadband test signal derived from the probability correlation masks the tinnitus noise;
performing a third step which varies the amplitudes of individual ones of the signal frequencies of the broadband test signal with reference to the probability correlation resulting in a modified broadband test signal; and
repeating the first and third steps with the modified broadband test signal having the signal frequencies with varied amplitudes based on the probability correlation until the probability correlation reaches or exceeds a second threshold value and storing the modified broadband test signal-in the memory.
2. The method according to claim 1 , which further comprises during the second step, setting randomly the amplitudes of individual ones of the signal frequencies of the broadband test signal.
3. The method according to claim 1 , which further comprises using a physiological model to determine the probability correlation.
4. The method according to claim 3 , which further comprises using a model of a basilar membrane as the physiological model, the probability correlation being determined on a basis of an excitation pattern of the model of the basilar membrane.
5. An apparatus for tinnitus characterization, comprising:
a signal generator;
a controller having a memory and a random number generator, said controller programmed to:
perform a first step which comprises the substeps of:
generate, via said signal generator, a broadband test signal having a plurality of narrowband signal frequencies disposed adjacent to each other;
output the broadband test signal to a user for masking a tinnitus noise;
compare the broadband test signal with the tinnitus noise to determine a masking effect the broadband test signal has on the tinnitus noise;
store the broadband test signal with an associated comparison result in said memory of said controller; and
determine a probability correlation for determining the tinnitus noise based on stored broadband test signals and associated comparison results, wherein in a case of a positive comparison result where the tinnitus noise is masked by the broadband test signal, the probability correlation for determining the tinnitus noise based on a correlation among commonalities of all positive comparison results being determined from the stored broadband test signals and the associated comparison results;
perform a second step which varies amplitudes of individual ones of the signal frequencies of the broadband test signal via said random number generator, wherein the first threshold value corresponding to a minimum number of the positive comparison results having a minimum probability that the broadband test signal derived from the probability correlation masks the tinnitus noise;
repeatedly perform the first and second steps until the probability correlation reaches or exceeds a first threshold value;
perform a third step which varies the amplitudes of individual ones of the signal frequencies of the broadband test signal with reference to the probability correlation resulting in a modified broadband test signal; and
repeating the first and third steps with the modified broadband test signal having the signal frequencies with varied amplitudes based on the probability correlation until the probability correlation reaches or exceeds a second threshold value and storing the modified broadband test signal in the memory.